The heat absorbed by the calorimeter is 2222.2 J when a metal object with a mass of 33.6 g is heated to 95.8°C and then transferred to a calorimeter containing 100.0 g of water at 17.4°C, with the final temperature of the water and metal being 23.8°C.
What is the heat absorbed by the calorimeter when a metal object is heated and transferred to water in a calorimeter?
To solve this problem, we can use the equation:
Q = m * c * ΔT
where Q is the heat absorbed or released, m is the substance's mass, c is the specific heat capacity, and T is the temperature change
First, we can calculate the heat absorbed by the metal object when it is heated from its initial temperature to the final temperature:
Qmetal = m * cmetal * ΔTmetal
Qmetal = 33.6 g * (0.385 J/g°C) * (23.8°C - 95.8°C)
Qmetal = -3684.4 J
Here, we have used a negative sign because the metal object loses heat to the surroundings.
Next, we can calculate the heat absorbed by the water and calorimeter when they are cooled from their initial temperature to the final temperature:
Qwater = (mwater + mcalorimeter) * cwater * ΔTwater
Qwater = (100.0 g + 50.0 g) * (4.184 J/g°C) * (23.8°C - 17.4°C)
Qwater = 1462.2 J
Here, we have used the combined mass of water and calorimeter, since they both experience the same temperature change.
Finally, we can use the principle of conservation of energy to equate the heat absorbed by the metal to the heat absorbed by the water and calorimeter:
Qmetal = -Qwater
-3684.4 J = -1462.2 J + Qcalorimeter
Solving for Qcalorimeter, we get:
Qcalorimeter = 2222.2 J
Therefore, the heat absorbed by the calorimeter is 2222.2 J.
To learn more about calorimeter, visit: https://brainly.com/question/1407669
#SPJ1
How many milliliters of an aqueous solution of 0.124 M silver fluoride is needed to obtain 17.8 grams of the salt? mL
We need 117.76 mL volume of the aqueous solution of 0.124 M silver fluoride to obtain 17.8 grams of the salt.
What is volume?
To solve this problem, we can use the formula:
mass = molarity x volume x molar mass
where mass is the mass of the solute (in grams), molarity is the concentration of the solution (in moles per liter), volume is the volume of the solution (in liters), and molar mass is the mass of one mole of the solute (in grams per mole).
First, we need to calculate the molar mass of silver fluoride (AgF):
AgF = 1 x 107.87 + 1 x 18.998 = 126.868 g/mol
Next, we can rearrange the formula above to solve for volume:
volume = mass / (molarity x molar mass)
Substituting the given values:
volume = 17.8 g / (0.124 mol/L x 126.868 g/mol)
volume = 117.76 mL
Therefore, we need 117.76 mL of the aqueous solution of 0.124 M silver fluoride to obtain 17.8 grams of the salt.
To know more about molar mass, visit:
https://brainly.com/question/22997914
#SPJ1
Complete question is: 117.76 milliliters of an aqueous solution of 0.124 M silver fluoride is needed to obtain 17.8 grams of the salt.
For the following reaction, 8.43 grams of silicon tetrafluoride are allowed to react with 7.68 grams of water . Silicon tetrafluroide (s) + water (l) -> hydrofluoric acid (aq) + silicon dioxide (s) What is the maximum amount of hydrofluoric acid that can be formed? What is the formula for the limiting reactant? What amount of the excess reactant remains after the reaction is complete?
We must identify the limiting reactant and use that information to compute the maximum amount of hydrofluoric acid that can be produced in order to provide answers to these questions. Calculating the quantity of extra reactant left behind after the reaction is finished is also necessary.
What in chemistry is a "limiting reagent"?A limiting reagent is a reactant in a chemical reaction that controls how much product is created, according to the definition of the term. Because the reactions between the elements and compounds in a balanced chemical equation depend on their mole ratios, the use of a limiting reactant is necessary.
A Limiting Reactant is what?A substance that takes part in a chemical reaction is known as a limiting reactant. It establishes the maximum product amount that
To know more about tetrafluoride visit:-
brainly.com/question/27590943
#SPJ1
If water is added to an acid, which describes how the pH of the solution will change?
A. increase
B. decrease
C. no change
D. increase then decrease
E. decrease then increase
Acid will be diluted by water, resulting in a reduction in the concentration of H+ ions. As a result, the solution's pH will rise.
What happens when acid is combined with water?The exothermic reaction that occurs when concentrated acid is mixed with water might result in burns due to the heat that is produced. On the other hand, when acid is gradually added to water while swirling continuously.
When water was added, what happened to the pH of the solution?A basic solution's pH lowers and its hydroxide ion concentration decreases when water is added to it. The pH of the solution drops gradually toward 7 as additional water is added, and it gradually becomes less alkaline.
To know more about concentration visit:-
https://brainly.com/question/10725862
#SPJ1
whoever answers all these questions gets brainliest and 35 points please help you don't have to explain it I just need answers this thing is extremely overdue.
Physical change example: Melting of ice: When ice melts, it undergoes a physical change as its state changes from solid to liquid. The chemical composition of water molecules remains the same.
Chemical change example: Burning of wood: When wood burns, it undergoes a chemical change as it reacts with oxygen in the air to produce carbon dioxide, water vapor, and ash. The chemical composition of the wood changes during the burning process.
How to explain the questionsSport example: Basketball - Friction, gravity, and inertia affect the movement of the ball and the players during the game. Friction between the ball and the court surface allows players to dribble the ball and make cuts and stops.
Gravity affects the arc of the ball when it's shot and how high it bounces. Inertia affects the movement of players when they run, jump, or change directions.
Electromagnetic energy in order of longest to shortest wavelength: Radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
Learn more about physical change on;
https://brainly.com/question/960225
#SPJ1
Cite one specific example each of a physical change and a chemical change.
Choose a sport, and then describe how friction, gravity, and inertia affect the action.
List these forms of electromagnetic energy in order from longest to shortest wavelength:
Create a “Chemical Reaction Poster” that will summarize key concepts about chemical reaction. In your poster, include
Definition of chemical reaction and balanced equation
Steps in balancing chemical equation and an example
Types of chemical reaction and an example for each
Picture/images related to chemical reaction
Other related information
Rubric:
Content ……………………25 points
Organization ……….… 25 points
Neatness/Creativity... 15 points
please help so it can bring my grade up
thank you soo much
A wire has a conductivity of 0.15 mho because because a chemical reaction is a procedure that causes one group of chemical components to change into another.
What is the crucial idea behind chemical reactions?The total mass of the reactants and products are equal in all chemical reactions. The total number and kinds of atoms in the reactants and the total number and kinds of atoms in the products are equal in all chemical reactions.
What does a student's account of a chemical reaction entail?Breaking chemical bonds between reactant molecules (particles) and creating new bonds between atoms in product particles are two aspects of chemical reactions (molecules). While there are the same number of atoms both before and after the chemical transition, there will be a change in the number of molecules.
To know more about conductivity visit:-
https://brainly.com/question/21496559
#SPJ1
Which equation would you need to rearrange to calculate the specific heat of an object?
Responses
A. ΔS=QT
delta S equals Q over T,
B. ΔU=Q+W
delta U equals Q plus W,
C. Q=mΔHf
Q equals m delta H subscript f,
D. Q=mCΔT
The answer will be option A.
Define thing or objectThings and objects are essentially different types of entities ontologically,Contrary to popular belief, merging specifics does not make an item identical.
Things have evolved.elements but not things. But objects are not onto logically harmless, whereas things are.anything is when moving.It is claimed to be moving.
An incoming jet, a leaf rustling in the breeze, or fluid trickling from such a hose could all be the source of the noise. Even the school you attend is connected to the planet Earth.
The formula for determining a substance's specific heat capacity is [tex]C= \frac{Q}{mT}[/tex]. [tex]Q[/tex] represents the energy [tex]T[/tex] stands for temperature shift and addition.
Learn more about object
https://brainly.com/question/31018199
#SPJ1
when 23ml of 0.100 m agno3 is combined with 27ml ml of 0.1000 m hcl in a coffe-cup calorimeter the temperature changes from 23.81 to 24.62 celcius calculate change in enthalkpy
The change in enthalpy for the reaction is -7.57 × 10^4 J/mol. This negative value indicates that the reaction is exothermic, meaning it releases heat to the surroundings.
To calculate the change in enthalpy, we need to use the equation:
ΔH = -q / n
where ΔH is the change in enthalpy, q is the heat absorbed or released by the reaction, and n is the number of moles of limiting reactant.
First, we need to determine the limiting reactant. This can be done by comparing the number of moles of each reactant:
moles of AgNO3 = (23 mL) x (0.100 mol/L) = 0.0023 mol
moles of HCl = (27 mL) x (0.1000 mol/L) = 0.0027 mol
Since AgNO3 has a smaller number of moles, it is the limiting reactant.
Next, we need to calculate the heat absorbed or released by the reaction. We can do this using the equation:
q = m × c × ΔT
where q is the heat absorbed or released, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the temperature change.
Assuming the specific heat capacity of the solution is 4.18 J/(g·K) and the density of the solution is 1.00 g/mL, we can calculate the mass of the solution:
mass of solution = (23 mL + 27 mL) × (1.00 g/mL) = 50 g
Substituting the values, we get:
q = (50 g) × (4.18 J/(g·K)) × (24.62°C - 23.81°C) = 174.5 J
Finally, we can calculate the change in enthalpy using the equation:
ΔH = -q / n
ΔH = -(174.5 J) / (0.0023 mol) = -7.57 × 10^4 J/mol
To learn more about enthalpy
https://brainly.com/question/13996238
#SPJ4
9. Which of the following best describes the valence electrons of a crystal that is an
excellent conductor?
The valence electrons of a crystal that is an excellent conductor are typically free to move throughout the crystal lattice.
This is because the crystal has a metallic bond, which is a type of chemical bond that occurs between atoms of metallic elements. In a metallic bond, valence electrons are delocalized and can move freely throughout the crystal structure, leading to the excellent conductivity of metals.
In contrast, materials with ionic or covalent bonds have electrons that are tightly bound to individual atoms and are not free to move throughout the crystal lattice. As a result, these materials are typically poor conductors of electricity.
Therefore, the valence electrons in a crystal that is an excellent conductor are delocalized and free to move, allowing the crystal to conduct electricity efficiently.
To know more about conductivity, visit:
https://brainly.com/question/12136944
#SPJ1
How many moles of potassium chloride form when 3 moles of potassium hydroxide react completely.
The balanced chemical equation for the reaction between potassium hydroxide (KOH) and potassium chloride (KCl) is:
KOH + HCl → KCl + H2O
From the equation,it can be seen that for every one mole of potassium hydroxide that reacts, one mole of potassium chloride is produced.
Therefore, if 3 moles of potassium hydroxide react completely, then 3 moles of potassium chloride will be produced. This is because the mole ratio of potassium hydroxide to potassium chloride is 1:1.
Thus, the answer is 3 moles of potassium chloride.
To know more about potassium chloride, visit :
https://brainly.com/question/22528097
#SPJ1
Mary Shelley wrote Frankenstein as a teenager for a ghost story contest between friends.
True
False
3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O
In the above equation, how many grams of water can be made when 6.3 moles of HNO3 are consumed?
Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0
Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:
Element Molar Mass
Hydrogen 1
Nitrogen 14
Copper 63.5
Oxygen 16
3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O
n(HNO3)=6.3mol
unknown/known=4/8=1/2
n(H2O)=n(HNO3)/2=3.15mol
m(H2O)=nxM=3.15x(1+1+16)=56.7g
Let me know if its wrong
A pure copper cube has an edge length of 3.00 cm
How many copper atoms does it contain? (volume of a cube = (edge length)^3
; density of copper = 8.96 g/cm^3)
Since this equals (edge length)3, the cube's volume is 3 * 1.12 cm, or 3.36 cm3. As a result, the cube has 3.36/8.96 g/cm3 = 0.43 grammes of copper atoms.
What is the perimeter of a volumetric cube?V= s3, where s is the length of one of the cube's edges, is the formula for a cube's volume. The length of the edge is equal to the volume's cube root, or 4 cm, if the volume is 64.
How do I figure out the atom count?To get the number of moles in an element or compound, divide the supplied mass by the element or compound's molar mass.
To know more about copper visit:-
brainly.com/question/26474177
#SPJ1
Which of the following is true for the quantum mechanical atomic model?
A. Atoms absorb or emit electrons from the nucleus when they interact with electromagnetic radiation.
B. Every atom absorbs all wavelengths of light energy or electromagnetic radiation.
C. Electrons give off electromagnetic radiation when they jump from a high to a low energy level.
D. Electrons are perfectly evenly distributed throughout the atom.
The true statement for the quantum mechanical atomic model is that Electrons give off electromagnetic radiation when they jump from a high to a low energy level.
Option c is correct.
What is e quantum mechanical atomic model?The quantum mechanical atomic model, also known as the wave mechanical model, describes the behavior of electrons in atoms as waves.
This model described that only electrons can exist only in certain discrete energy levels around the nucleus. When an electron absorbs energy, it moves to a higher energy level.
In other words, when it loses energy, it moves to a lower energy level.
Learn more about quantum mechanical atomic model at:
https://brainly.com/question/3504937
#SPJ1
a) Develop an awareness campaign using the stages of change model to sensitize expectant mothers on the dangers of alcoholism.
b) What are the likely obstacles to implementation of this programme
c) Suggest your role as a public health officer in promotion of health behaviors
Programs on substance abuse are run in schools, colleges, businesses, and communities. These program are aimed at reducing drug and alcohol usage while addicts and dependents to seek treatment.
How knowledgeable are you about the harmful effects of alcohol abuse?long-term health risks. Heavy alcohol use might eventually lead to the onset of serious conditions like high blood pressure, heart disease, strokes, liver problems, and digestive problems. cancers of the breast, oesophagus, mouth, throat, liver, and rectum.
What is the goal of alcohol education?Campaigns to raise awareness are designed to: stop young individuals from consuming alcohol before they reach 18. preventing drinking that is unhealthy. preventing alcoholism-related psychological or physical dependence.
To know more about drug visit:
https://brainly.com/question/13294633
#SPJ1
2 moles of calculate the pressure exerted by Co₂ Gas at 27°C and Volume of 4 litres: (dm³)
In order to calculate the moles of Oxygen needed to react with
5g of Diethylzinc, what other information will we need in
addition to the chemical equation?
O A The molar mass of all elements, number of atoms of
Oxygen, and the time the reaction took to complete.
O B. A balanced chemical equation and the molar mass of
all elements.
OC. The number of moles for each element and the
number of atoms in each substance.
OD. The number of atoms in each reactant and product.
B. A balanced chemical equation and the molar mass of all elements are needed in order to calculate the moles of Oxygen needed to react with 5g of Diethylzinc.
What is the moles?To calculate the moles of Oxygen needed to react with 5g of Diethylzinc, we need a balanced chemical equation and the molar mass of all elements involved. The balanced chemical equation will provide us with the stoichiometric ratio between Diethylzinc and Oxygen in the reaction, while the molar mass of Oxygen will allow us to convert the given mass of Diethylzinc into moles
Therefore, The balanced chemical equation will tell us the mole ratio of Diethylzinc and Oxygen, and the molar mass of Oxygen will be used to convert the given mass of Diethylzinc to moles.
Read more about Oxygen here:
https://brainly.com/question/26073928
#SPJ1
A solution of rubbing alcohol is 76.4% (v/v) isopropanol in water. How many milliliters of isopropanol are in a 89.6 mL sample of the rubbing alcohol solution?
The total volume of the solution is 89.6 milliliters. The percentage of isopropanol is 76.4% (v/v), so 76.4% of the total volume is isopropanol.
What is an isopropanol?Isopropanol, also known as isopropyl alcohol, is a colorless, flammable liquid with a strong odor. Isopropanol is the simplest example of a secondary alcohol, and is frequently used as a cleaning agent and disinfectant in many industries. It is also used in the production of acetone.
What is rubbing alcohol?Rubbing alcohol, which is also known as isopropyl alcohol, is a clear liquid chemical compound. It is used as a topical antiseptic because it has a strong disinfectant and antibacterial action. Rubbing alcohol is also used as an fuel additive in automobiles, as a cleaning solvent in industry, and as a solvent in chemical reactions. Additionally, it can be used as a disinfectant for medical and cosmetic purposes, including cleansing wounds and preventing infection.
To calculate the amount of isopropanol, we must multiply 89.6 milliliters by 76.4%. 89.6 milliliters x 0.764 = 68.6064 milliliters of isopropanol Therefore, there are 68.6064 milliliters of isopropanol in a 89.6 mL sample of the rubbing alcohol solution.
To know more about isopropanol, visit:
https://brainly.com/question/22284953
#SPJ1
A certain experiment generates hydrogen gas, which is collected over water. The temperature is 283 K and the atmospheric pressure is 0.97 atm. What is the partial pressure of H2?
Answer:
partial pressure of H2 = 0.9574 atm OR 727.6 mmHg
Explanation:
in case of collection of gas over water:
[tex]P_{atm} = P_{vapor} + P{gas}[/tex]
[tex]P_{atm}[/tex]: atmospheric pressure
[tex]P_{vapor}[/tex]: pressure of water vapor (must be given in the question!)
[tex]P_{gas}[/tex]: pressure of gas
in this question:
water vapor pressure at 283K (10°C) = 9.6 mmHg (again, this must be given in the question)
Given: [tex]P_{atm}[/tex] = 0.97 atm = 737.2 mmHg
by substitution in the formula:
737.2 = 9.6 + [tex]P_{H_2}[/tex]
[tex]P_{H_2}[/tex] = 727.6 mmHg = 0.9574 atm
In Experiment 2, what was the pressure of the butane gas in the Erlenmeyer flask after the addition of 40 mL of water? Note: Depending on the actual amount of water dispensed in the lab, there is a range of possible answers. Pick the value that is closest to yours.
The correct answer is d) It depends on the initial pressure and temperature of the gas, volume of the flask, and partial pressure of water vapor.
The pressure of the butane gas in the Erlenmeyer flask after the addition of 40 mL of water cannot be determined without additional information, such as the initial pressure and temperature of the gas, volume of the flask, and partial pressure of water vapor. These factors would need to be known in order to calculate the final pressure of the gas using the ideal gas law.
Therefore, it is important to have accurate experimental data and perform proper calculations to determine the pressure of the butane gas in the Erlenmeyer flask after the addition of 40 mL of water.
To learn more about butane gas visit;
https://brainly.com/question/15123098
#SPJ4
Correct question:
What is the pressure of the butane gas in the Erlenmeyer flask after the addition of 40 mL of water in Experiment 2?
a) 1 atm
b) 2 atm
c) 3 atm
d) It depends on the initial pressure and temperature of the gas, volume of the flask, and partial pressure of water vapor.
How many atoms of boron are present in 2.29 moles of boron trifluoride?
2.29 moles of boron trifluoride contain 1.38 10²⁴ atoms of boron.
The amount of atoms in boron trifluoride.One boron atom and three fluorine atoms make up the trigonal planar molecule known as boron trifluoride.
The atomic masses of boron (B) and fluorine (F), which are 10.81 g/mol and 18.99 g/mol respectively, may be added to determine the molar mass of boron trifluoride (BF3).
Molar mass of BF3 = (1 × molar mass of B) + (3 × molar mass of F)
Molar mass of BF3 = (1 × 10.81 g/mol) + (3 × 18.99 g/mol)
Molar mass of BF3 = 67.81 g/mol
Now we can calculate the number of moles of BF3 using its given mass:
Mass of BF3 / molar mass of BF3 equals moles of BF3.
moles of BF3 = 2.29 moles
1 mole of BF3 contains 1 mole of B
1 mole of B contains Avogadro's number (6.02 × 10²³) atoms of B
Therefore, the number of atoms of boron in 2.29 moles of BF3 is:
2.29 moles of BF3 x (1 mole of B / 1 mole of BF3) x (6.02 × 10²³ atoms of B / 1 mole of B) = 1.38 × 10²⁴ atoms of B.
To know more about boron trifluoride visit:-
https://brainly.com/question/9356683
#SPJ1
During the 1986 accident in Chernobyl nuclear power plant located in the former Soviet
Union, radioactive strontium was released into the environment. There was a concern that
if strontium were ingested, then this radioactive nuclide would be incorporated into parts
of the body where large amounts of Ca are deposited in the workers' bodies such as in the
bones and the teeth. Based upon of the positions of Sr and Ca in the periodic table, explain
the logic of this concern.
In the periodic table, strontium (Sr) and calcium (Ca) both belong to Group 2A, sometimes referred to as the alkaline earth metals.
What impact did the Chernobyl disaster have on the natural world?After the disaster, radioactive substances were primarily spread by contaminated rain on open surfaces like lawns, parks, roadways, and building roofs. Due to the effects of wind, rain, traffic, street washing, and cleanup since then, there is less surface contamination in metropolitan areas.
What natural factors led to the explosion at the Chernobyl power plant?At least 5% of the radioactive reactor core was discharged into the atmosphere following the steam explosion and fires.
To know more about radioactive visit:-
https://brainly.com/question/7180704
#SPJ1
Fluoride, a very stable form of fluorine, is often added to toothpaste and drinking water to prevent
tooth decay. What is the formula of this species?
a. F
b. Fl-
C. Fl+
d. F²-
HI + RbOH →→ Rbl + H₂O
-
In a titration experiment a 300 mL sample of hydrolodic acid (HI) 2.15 M is completely neutralized by 212 mL of an
aqueous solution of rubidium hydroxide (RbOH). What was the molarity of the initial RbOH?
6.45 M RbOH
(orange)
1.52 M RbOH
(magenta)
3.04 M RbOH
(aqua green)
The balanced chemical equation for the reaction between HI and RbOH is:
HI + RbOH → RbI + H2O
From the equation, we can see that 1 mole of HI reacts with 1 mole of RbOH to produce 1 mole of RbI and 1 mole of H2O.
To determine the molarity of the initial RbOH, we can use the following formula:
Molarity of RbOH = (moles of RbOH) / (volume of RbOH solution in liters)
First, let's calculate the number of moles of HI in the 300 mL sample:
moles of HI = Molarity x volume in liters
moles of HI = 2.15 mol/L x 0.3 L
moles of HI = 0.645 mol
Since 1 mole of HI reacts with 1 mole of RbOH, the number of moles of RbOH used in the titration is also 0.645 mol.
Now, we can use the volume and concentration of the RbOH solution to calculate its molarity:
Molarity of RbOH = (moles of RbOH) / (volume of RbOH solution in liters)
Molarity of RbOH = 0.645 mol / 0.212 L
Molarity of RbOH = 3.04 M
Therefore, the molarity of the initial RbOH solution was 3.04 M, which corresponds to the aqua green option.
Answer:
The balanced chemical equation for the reaction between hydriodic acid (HI) and rubidium hydroxide (RbOH) is:
HI + RbOH → RbI + H2O
From the balanced equation, we can see that the stoichiometry of the reaction is 1:1, which means that 1 mole of HI reacts with 1 mole of RbOH.
Given that a 300 mL sample of HI with a concentration of 2.15 M is completely neutralized by 212 mL of RbOH, we can use the following equation to determine the molarity of RbOH:
Molarity of HI x Volume of HI = Molarity of RbOH x Volume of RbOH
2.15 M x 0.300 L = Molarity of RbOH x 0.212 L
Molarity of RbOH = (2.15 M x 0.300 L) / 0.212 L = 3.04 M
Therefore, the molarity of the initial RbOH solution was 3.04 M, option (aqua green).
If 6.25 g of CuNO3 is dissolved in water to make a 0.840 M solution, what is the volume of the solution in milliliters?
The volume of the solution is 39.6 mL. Solutions can be formed by dissolving solids, liquids, or gases in a liquid solvent or by dissolving gases in a solid solvent.
What is Solution?
A solution is a homogeneous mixture of two or more substances in which the components are uniformly distributed on a molecular or ionic level. In a solution, the substance that is present in the largest amount is called the solvent, and the substance that is present in smaller amounts is called the solute.
We can use the following formula to calculate the volume of the solution:
Molarity (M) = moles of solute (n) / volume of solution in liters (V)
First, we need to calculate the number of moles of Cu(NO3)2:
mass of Cu(NO3)2 = 6.25 g
molar mass of Cu(NO3)2 = 187.56 g/mol (63.55 g/mol for Cu + 2x14.01 g/mol for N + 6x16.00 g/mol for O)
moles of Cu(NO3)2 = mass / molar mass = 6.25 g / 187.56 g/mol = 0.0333 mol
Next, we can rearrange the formula to solve for the volume of the solution:
V = n / M
V = 0.0333 mol / 0.840 M = 0.0396 L
Finally, we convert the volume to milliliters:
V = 0.0396 L x 1000 mL/L = 39.6 mL
Learn more about Solution from the given link
https://brainly.com/question/25326161
#SPJ1
How many moles of copper are required to replace silver from 4.0 moles of silver nitrate?
Answer: 2.0 moles of copper are required to replace silver from 4.0 moles of silver nitrate.
Explanation:
The chemical equation for the reaction between copper and silver nitrate is:
Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
From this equation, we can see that 1 mole of copper reacts with 2 moles of silver nitrate.
To find how many moles of copper are required to replace silver from 4.0 moles of silver nitrate, we need to use the mole ratio between copper and silver nitrate.
1 mole of copper reacts with 2 moles of silver nitrate, so:
1 mole Cu / 2 moles AgNO3
To calculate how many moles of copper are needed to replace 4.0 moles of silver nitrate, we can use the mole ratio as follows:
4.0 moles AgNO3 x (1 mole Cu / 2 moles AgNO3) = 2.0 moles Cu
Therefore, 2.0 moles of copper are required to replace silver from 4.0 moles of silver nitrate.
Answer:2.00 moles Cu
Explanation:4.0mol AgNO3 x 1 mol cu
/ 2 mol Ag NO3
Calculate ΔHrxn for the following reaction: Al2O3(s)+3CO(g)→2Al(s)+3CO2(g) Use the following reactions and given ΔH values: 2Al(s)+32O2(g)→Al2O3(s),ΔH CO(g)+12O2(g)→CO2(g),ΔH==−1675.7kJ−282.7kJ
The desired reaction is 2Al(s) + 3CO2 from Al2O3(s) + 3CO(g) (g) The reactions include 2 Al(s), 3/2 O2(g), and Al2O3(s), with H = 1675.7kJ. ————————— (1) CO(g) = CO2 + 1/2 O2(g) (g).
How is H inside a calculated?As a result, the enthalpies of a reactants and products are added together, and the result is used to compute the enthalpy of a reaction. This endothermic process generates and absorbs environmental heat if H is positive. This reaction is exothermic so emits heat into the environment if H is negative.
What is the H heat?A negative H indicates that heat is transferred from the a system towards its surroundings, whereas a positive H indicates that heat is transferred from the surroundings into the system. An enthalpy of reaction (Hrxn) for a chemical reaction is the difference of enthalpy between the products and reactants; Hrxn is measured in kilojoules per mole.
To know more about reaction visit:
https://brainly.com/question/28984750
#SPJ1
Chemistry Help!
1. Copper is commonly used to make electrical wires. How many moles of copper are in 5.00 grams of copper wire?
2. Our bodies synthesize protein from amino acids. One of these amino acids is glycine, which has a molecular formula of C2H5O2N. How many moles of glycine molecules are contained in 28.35 grams of glycine?
3. Vitamin C is a covalent compound with the formula of C6H8O6. The recommended daily dietary allowance of vitamin C for children aged 4-8 years is 1.42 x 10-4 mol.
a. What is the mass of this allowance in grams?
b. How many moles of carbon are in 1.42 x 10-4 mol of C6H8O6?
4. Rank the following from lowest number of particles to highest. Explain your reasoning.
2.3 mol H2O 3.5 mol H2 0.50 mol C100H202
Answer:
1. The molar mass of copper is 63.55 g/mol. To find the number of moles of copper in 5.00 grams, we divide the given mass by the molar mass:
5.00 g Cu / (63.55 g/mol Cu) = 0.0787 mol Cu
Therefore, there are 0.0787 moles of copper in 5.00 grams of copper wire.
2. The molar mass of glycine (C2H5O2N) is:
12.01 g/mol (C) + 1.01 g/mol (H) x 5 + 16.00 g/mol (O) x 2 + 14.01 g/mol (N) = 75.07 g/mol
To find the number of moles of glycine in 28.35 grams, we divide the given mass by the molar mass:
28.35 g glycine / (75.07 g/mol glycine) = 0.377 mol glycine
Therefore, there are 0.377 moles of glycine molecules in 28.35 grams of glycine.
3. a. To find the mass of 1.42 x 10^-4 mol of vitamin C, we multiply the molar mass of vitamin C (176.12 g/mol) by the number of moles:
1.42 x 10^-4 mol x 176.12 g/mol = 0.0248 g
Therefore, the mass of the recommended daily dietary allowance of vitamin C for children aged 4-8 years is 0.0248 grams.
b. The molecular formula of vitamin C is C6H8O6, so there are 6 moles of carbon for every mole of vitamin C. Therefore, there are:
1.42 x 10^-4 mol x 6 = 8.52 x 10^-4 mol of carbon
in 1.42 x 10^-4 mol of C6H8O6.
4. To rank the following from lowest number of particles to highest, we need to compare the number of particles in each of the given amounts.
2.3 mol H2O: 2.3 mol x 6.022 x 10^23 molecules/mol = 1.39 x 10^24 molecules of H2O
3.5 mol H2: 3.5 mol x 6.022 x 10^23 molecules/mol = 2.11 x 10^24 molecules of H2
0.50 mol C100H202: 0.50 mol x 6.022 x 10^23 molecules/mol = 3.01 x 10^23 molecules of C100H202
Therefore, the ranking from lowest to highest number of particles is:
0.50 mol C100H202 < 2.3 mol H2O < 3.5 mol H2.
The reasoning is based on the Avogadro's number which represents the number of particles in one mole of a substance, which is equal to 6.022 x 10^23. The substance with the smallest number of moles has the smallest number of particles, and the substance with the largest number of moles has the largest number of particles.
What is the same on the left and right side of a balanced equation?
The total number of atoms for each element in a chemical equation that is balanced is the same on both sides of the equation.
What is the same on each side of an equation that is balanced?An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.
Why is a chemical equation need to be balanced?For the chemical equation to adhere to the rule of conservation of mass, it must be balanced. A chemical equation is said to be balanced when the number of various elemental atoms on the reactants and products sides are equal.
To learn more about balanced equations visit:
brainly.com/question/2399130
#SPJ1
If water is added to a base, which describes how the pH of the solution will change?
A. increase
B. decrease
C. no change
D. increase then decrease
E. decrease then increase
Answer: the pH would decrease
Explanation:
bases are alkaline which means that thir pH would in the category between 14 and 8
Water is neutral which meand that it's pH is at 7
so if you add water to a base then the concentration the pH would eventually decrease towards a 7
hope it helps✨✨
How could an astronaut benefit from a gyroscope during their training?
Gyroscope training is advantageous for astronauts because it improves their coordination, balance, and spatial orientation in a microgravity simulation. Also, it can enhance their capacity for jobs in space and help them become less prone to motion sickness.
What function does a gyroscope serve in space?Gyroscopes in spacecraft alert the onboard computer when the craft has changed orientation (direction and pointing). The stabilising system for the spaceship receives the data from the computer after that.
What kind of training is required for astronauts to travel to space?To become a fully qualified astronaut, you may need to complete up to two years of training. The International Space Station and the Space Shuttle must be introduced to candidates.
To know more about coordination visit:-
https://brainly.com/question/27289242
#SPJ9