To calculate the mass of 2.20 x 10^22 formula units of NaOH, we first need to find the number of moles of NaOH using Avogadro's number (6.02 x 10^23):
Number of moles of NaOH = (2.20 x 10^22 formula units) / (6.02 x 10^23 formula units/mol)
Number of moles of NaOH = 0.0365 mol
Next, we can use the molar mass of NaOH (40.0 g/mol) to convert the number of moles to mass:
Mass of NaOH = (0.0365 mol) x (40.0 g/mol)
Mass of NaOH = 1.46 g
Therefore, the mass of 2.20 x 10^22 formula units of NaOH is 1.46 grams (rounded to three significant figures).
ILL GIVE BRAINLY HIRRYDeep ocean currents are caused by differences in ____________. (Lesson 2.09)
Question 20 options:
fish population
water density
water salinity
Coriolis affect
Answer:
water density
Explanation:
These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation
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HELP! ILL MARK YOU AS BRAINLIST
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 400.
g of pure Cu
Express your answer to three significant figures and include the appropriate
units.
To solve this problem, we need to use the molar mass of copper and the stoichiometry of the balanced equation to determine how much chalcopyrite is needed to produce 400 g of pure copper.
The molar mass of copper is 63.55 g/mol, which means that 1 mole of copper contains 63.55 grams of copper. Using this information, we can convert 400 g of copper to moles:
400 g Cu x (1 mol Cu/ 63.55 g Cu) = 6.292 mol Cu
From the balanced equation of the reaction, we know that 1 mole of chalcopyrite (CuFeS2) produces 1 mole of copper. Therefore, we need to mine the same number of moles of chalcopyrite as the number of moles of copper required.
To determine the number of moles of chalcopyrite needed, we can use the molar mass of chalcopyrite:
Molar mass of CuFeS2 = (1 x atomic mass of Cu) + (1 x atomic mass of Fe) + (2 x atomic mass of S)
= (1 x 63.55 g/mol) + (1 x 55.85 g/mol) + (2 x 32.06 g/mol)
= 183.53 g/mol
Now we can convert the moles of copper to moles of chalcopyrite:
6.292 mol CuFeS2 x (183.53 g CuFeS2/ 1 mol CuFeS2) = 1154.4 g or 1.1544 kg of CuFeS2
Therefore, we need to mine 1.1544 kg of chalcopyrite to obtain 400 g of pure copper.
Complete the reaction, balance the reaction, and indentify the gas formed
HCI + CuSO3 ------
The complete and balanced reaction equation is: CuSO3(s) -> CuO(s) + SO2(g)
Balancing chemical reactionsThe reaction between HCI (hydrochloric acid) and CuSO3 (copper(II) sulfite) is not a valid chemical equation.
Copper(II) sulfite is not a stable compound, and it decomposes readily in air to form copper(II) oxide (CuO) and sulfur dioxide (SO2) according to the following equation:
CuSO3(s) -> CuO(s) + SO2(g)
The balanced equation for this reaction is: https://brainly.com/question/14258973
CuSO3(s) -> CuO(s) + SO2(g)
The gas formed in this reaction is sulfur dioxide (SO2).
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23. Given the following equilibrium mixture of gases at 500 °C where AH is negative, what will be the effect of (a) (b) 2CO(g) + 0,2CO₂(g) adding more O, at constant pressure? increasing the temperature? (c) cooling below 100°C? (d) adding a catalyst? (e) doubling the pressure at 200 °C? (f) adding a base to absorb CO₂?
The equilibrium shifts in the direction that tends to oppose the change done.
What is Chemical equilibrium?Chemical equilibrium is the state of a system in which the rate of the forward reaction is equal to the rate of the reverse reaction.
Chemical equilibrium is a dynamic process. The forward and reverse reactions continue to occur even after equilibrium has been reached. However, because the rates of the reactions are the same, there is no change in the relative concentrations of reactants and products for a reaction that is at equilibrium.
The equilibrium reaction is given as -
2 CO + O₂ ⇒ 2CO₂
ΔH = negative
This means that the forward reaction is exothermic.
Addition of oxygen shifts the equilibrium towards the product side.
When the temperature is increased the backward reaction will be favored and the equilibrium will be shifted towards the reactant side.
Cooling below 100⁰C results into shifting the equilibrium towards product side.
Adding a catalyst does not alter the direction of equilibrium.
Doubling the pressure would shift the equilibrium towards product side.
Adding a base to absorb CO₂ would shifts the equilibrium towards the product side.
Therefore, The equilibrium shifts in the direction that tends to oppose the change done.
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Answer :Adding of oxygen shifts the equilibrium to the right side which is the product side.
increasing of the temperature will shift the equilibrium to the left side which is the reactant side
cooling below 100c will shift the equilibrium to the right side which is the product side
Adding a catalyst does not affect the chemical equilibrium
Doubling the pressure would shift the equilibrium to the right side which is the product side
Adding a base to absorb CO2 would shift the equilibrium to the product side
Explanation:
I have 1.4 moles of a gas at a pressure of 4.7 atm and a volume of 23 liters, what is the temperature in Kelvin?
write a lab report for this lesson's lab. be sure that your report includes all major elements of lab report meets your teacher's content and format expectations is clearly organized and formatted demonstrates strong scientiffic reasoning and writing
Including the title, abstract, introduction, techniques & materials, results, commentary, conclusion, & references, a lab report is divided into eight components.
What exactly is a chemistry lab?This lab is equipped with all the tools required for sample preparation as well as the standards needed for a variety of fluid and solid sample analyses. Glassware, exhaust fans, a muffled furnace, centrifuges, aggregate mills, and ovens are among the conventional equipment found in the lab.
In chemistry, how do we do labs?It gives you an opportunity to put your knowledge to use while reinforcing the topics you have studied in class. You will gain knowledge of certain crucial experimental skills that are required if you want to work as a successful chemist.
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Question 8 (2 points)
A gas occupies 50.5 mL at 72 degrees Celcius and 3 atm. Find the new volume of this gas at 5 degrees Celcius and 2 atm.
Ex: 92 cm
The 25 is the new volume of this gas at 5 degrees Celcius and 2 atm.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
What is volume ?
Space is occupied by every three-dimensional object. Its volume serves as a gauge for this area. The area contained by an object's limits in three-dimensional space is referred to as its volume. Another name for it is an object's capacity.
Therefore, 25 is the new volume of this gas at 5 degrees Celcius and 2 atm.
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I WILL MARK BRAINLIEST
Have rabbits in Australia had a negative impact on the environment?
Yes
No
Which of the following is NOT an effect that an invasive species can have on an ecosystem?
Responses
overpopulation of the invasive species due to no natural predators
reduced survival rate of native organisms
reduced resources for native organisms
introducing new organisms ALWAYS benefits the native organisms in the ecosystem
Invasive species are__accidentally transported to a new ecosystem.
always
sometimes
never
Attempts to control the rabbit population has NOT cost the Australian government (taxpayers) any money.
True
False
If people do nothing to try to control the rabbit population in Australia, over time the vegetation would decrease, which would then cause the rabbit population to __
increase
decrease
stay the same
According to the article, which of the following organisms were NOT specifically mentioned as being impacted by the rabbit population?
Humans
Pig-footed bandicoot
Humans
Pig-footed bandicoot,
Eremophila plant,
Kangaroo
Mosquitos and fleas carrying the Myxoma virus
Fencing
Releasing wolves
Trapping and Shooting
Answer:
1.yes
2.invasive species are_ accidentally transported to a new ecosystem
3.false
4.increase
5.
6.fencing
sorry I don't know the fifth one but I hope it helpful
How many moles of sodium correspond to 1.56 x 10^21 atoms of sodium?
0.0025 moles correspond to 1.56 × 10²¹ atoms of sodium.
What is Mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Atoms of sodium = 1.56 × 10²¹ atoms
we know that,
1 mole = 6.023 × 10²³ atoms
Number of moles of sodium = number of atoms ÷ 6.023 × 10²³
= 1.56 × 10²¹ atoms ÷ 6.023 × 10²³
= 0.0025 moles of sodium
Therefore, 0.0025 moles correspond to 1.56 × 10²¹ atoms of sodium.
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childrens chewable tylenol contains 80. mg acetaminophen per tablet. If the measure dosage is 10. mg of drug per tablet of body mass, then how many tablets are needed for a 42 pound child?
If the chewable contains 80. mg acetaminophen and dosage is 10. mg per body mass The tablets needed for the 42 pound child is 2.38 tablets
How to solve for the drug neededTo calculate the number of tablets needed for a 42 pound child, we need to use the recommended dosage of 10 mg of acetaminophen per kilogram of body weight.
First, we need to convert the child's weight from pounds to kilograms:
42 pounds = 19.05 kilograms
Next, we can calculate the total amount of acetaminophen that the child needs based on their weight:
19.05 kg x 10 mg/kg = 190.5 mg
Finally, we can divide the total amount of acetaminophen needed by the amount of acetaminophen per tablet:
190.5 mg ÷ 80 mg/tablet = 2.38 tablets
Since we can't give a partial tablet, we would round up to 3 tablets.
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Find the ion symbol for the atom and its charge
Answer:
Oxygen 17 isotope with neutral charge
Explanation:
The atom has 8 red protons and 8 black electrons so it is neutral. Since it has 8 protons, it has atomic number of 8, which is oxygen (O).
There are 9 blue neutrons. The mass number = #protons + #neutron = 8 + 9 = 17. Therefore it is the oxygen 17 isotope.
Which of the following combinations will result in a precipitate, according to solubility rules?
Potassium iodide (KI) and silver nitrate (AgNO3)
Ammonium chloride (NH4Cl) and sodium hydroxide (NaOH)
Sodium nitrate (Na2CrO4) and barium chloride (BaCl2)
Calcium sulfate (CaSO4) and sodium carbonate (Na2CO3)
Silver nitrate, sodium hydroxide, ammonium chloride, and potassium iodide (KI, AgNO3, NH4Cl) (NaOH).
What does chloride in a blood test indicate?One of your blood's electrolytes is chloride. Chloride blood tests verify that you have the right amounts of chloride within your blood for good health. Chloride levels in the blood can be abnormal for a variety of reasons, including dehydration, vomiting, and certain medical diseases.
What does a low chloride blood test mean?A measurement of a chloride concentration is the blood chloride value. Specifically, the number of milliequivalents of chloride per liter. Hypochloremia, then, is a condition in which your blood chloride concentration is below normal. Hyperchloremia is the medical term for having excessive levels of chloride within your blood.
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Based on the balanced chemical equation, 2Al(s) + 3H₂SO4(aq) -> Al2(SO4)3(aq) + 3H2(g), how much 4.00 M sulfuric acid is needed to produce 2 moles of aluminum sulfate?
Aluminum sulfate is very non-toxic, having acute and chronic oral LD50 values above 5,000mg/kg (5). Alum, on the other hand, can cause irritation, burns, and breathing problems.
What is Aluminium sulfate used for?
Aluminum sulfate is a crystalline (sand-like) solid that is odorless, white or colorless. It is utilized in sewage treatment, water purification, paper production, and leather tanning. Aluminum sulfate is also known as alum or papermaker's alum; however, the term "alum" refers to any double sulfate salt having the general formula XAl(SO4)212H2O, where X is a monovalent cation such as potassium or ammonium (5).
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A bubble of helium gas has a volume of 0.650 mL near the bottom of a large aquarium where the pressure is 1.54 atm
and the temperature is 12°C.
Determine the bubble's volume upon rising near the top where the pressure is 1.0l atm and
116°
The bubble's volume upon rising near the top of aquarium where the pressure is 1.01 atm and temperature is 116°C is 0.869 mL
What is meant by volume of gas?Volume of gas can be defined as the space occupied by gaseous particles at standard temperature and pressure conditions.
As we know, (P₁V₁)/T1 = (P₂ V₂)/ T₂
P₁, V₁, and T₁ are initial pressure, volume, and temperature, and P₂, V₂, and T₂ are final pressure, volume, and temperature.
T₁ = 12°C + 273.15 = 285.15 K
T₂ = 116°C + 273.15 = 389.15 K
(P₁V₁) /T₁ = (P₂V₂)/T₂
(1.54 atm × 0.650 mL) / 285.15 K = (1.01 atm × V₂) / 389.15 K
So, V₂ = (1.54 atm × 0.650 mL × 389.15 K) / (1.01 atm × 285.15 K)
V₂ = 0.869 mL
Therefore, the bubble's volume upon rising near the top of the aquarium where the pressure is 1.01 atm and the temperature is 116°C is 0.869 mL
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What is the total molar mass of oxygen in 4.000 molea of CO2
Explanation:
Refer to pic..........
What Mass of h20 reacted?
The mass of water reacted is 17.67g.
What is STP?STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.
According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -
Temperature of 0 degree celsius (273K)Pressure of 1 atmIt is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.
One mole of a gas under STP conditions occupies a volume of 22.4L.
Given,
Volume of oxygen = 11L
Since 1 mole of a gas occupies 22.4 L of volume at STP.
Moles of oxygen produced = 11 ÷ 22.4
= 0.49 moles
From the reaction,
1 mole of oxygen is produced by 2 moles of water.
Thus, 0.49 moles of oxygen is produced by 0.49 × 2 moles of water
So, moles of water = 0.98 moles
mass = moles × molar mass
= 0.98 × 18
= 17.67g
Therefore, mass of water reacted is 17.67g.
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CO(g) + Cl₂ (g) = COCh₂2 (g)
If Ke 5.0 at 600 K for this reaction, what are the equilibrium partial pressures of the three gases
if a reaction vessel initially contains a mixture of the reactants in which Pco = Pc2=0.265 atm
and there is no COCl₂?
At chemical equilibrium, the partial pressure of the three gases is 0.265 atmospheres.
What is chemical equilibrium?Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.
At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.
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How many moles of O2 are required to generate 12 moles SO2 gas?
From the balanced chemical equation:
2CuFeS2 + 5O2 → 2Cu + 2FeO + 4SO2
We can see that for every 5 moles of oxygen (O2) that react, 4 moles of sulfur dioxide (SO2) are produced. Therefore, we can use a proportion to calculate the number of moles of O2 required to produce 12 moles of SO2:
5 moles O2 : 4 moles SO2 = x moles O2 : 12 moles SO2
Cross-multiplying, we get:
5 moles O2 x 12 moles SO2 = 4 moles SO2 x (x moles O2)
60 = 4x
x = 15
Therefore, 15 moles of O2 are required to generate 12 moles of SO2 gas.
Answer:
15 was right on acellus
Explanation:
Greg's doctor has ordered a PET scan of his heart. In radiological imaging such as PET or CT scans, dosages of pharmaceuticals are based on body mass. If Greg weighs 216-lb, what is his body mass in grams? Please make sure to include the correct unit symbol with the answer choice.
The doctor would then be aware of Greg's weight of 108.6 kg.
What safety measures are necessary for a PET-CT scan?Typically, you won't be allowed to eat or drink for six hours prior to the procedure, although you can drink water. Moreover, you should refrain from intense activity for 24 hours before to your consultation. It's wise to dress comfortably and loosely.
What distinguishes a CT scan from a PET-CT scan?The internal organs and tissues of your body are depicted in great detail by a CT scan. A PET scan can be more sensitive than other imaging procedures and can detect aberrant activity. Also, it can cause your body to alter sooner. PET-CT scans are used by doctors to reveal more details about the cancer.
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Which statement describes how using solar panels on a large scale to obtain energy can negatively impact the environment
The solar energy is a massive source of energy which can generate electricity and reduce the global warming emissions. But the set up of solar panels have both positives and negatives.
What are the negative impacts of solar panels?The manufacturing process of solar panels requires hazardous chemicals and materials for cleaning the semiconductors. The chemicals include hydrofluoric acid, sulfuric acid, etc.
In addition to the release of these chemicals, the solar panel manufactures inhale silicon dust which threatens the public health. The solar energy systems require a large area of land which can lead to the loss of wildlife habitats.
The construction of solar panels also affect soil compaction and erosion.
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Why are oceans a major part of the water cycle?
A. because they are large bodies of salt water that easily evaporate salt into the air
B. because they are large bodies of salt water that fresh water can be evaporated
from
C. because the salt water condenses easily to become a gas in the air
D. because the salt water runs off onto land to fill lakes and streams
Answer:
I think it's B
Explanation:
Oceans and Seas and the Water Cycle Completed. The oceans are, by far, the largest storehouse of water on earth — over 96% of all of Earth's water exists in the oceans. Not only do the oceans provide evaporated water to the water cycle, they also allow water to move all around the globe as ocean currents.
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When something gets Cold, it gains cold energy.
When something gets cold, it absorbs energy in the form of cold energy from its environment. This energy is released as heat when the object is heated up again.
What is energy?Energy is the ability to do work. It is the capacity to cause change, move objects, and make things happen. Energy can come from different sources, such as the sun, fossil fuels, and nuclear power. Energy can also be stored, such as in batteries, food, or chemical compounds. It is a fundamental part of the universe, and it is necessary for life to exist. Energy can take many forms, such as kinetic, potential, thermal, chemical, electromagnetic, and nuclear energy. Kinetic energy is energy that is in motion, such as a moving car or a flying bird. Potential energy is energy stored in an object due to its position or composition, such as a rock at the top of a hill. Thermal energy is the energy of heat, such as the heat from a fire.
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Which one is a molecular formula Na2SO4, C6H5Cl, N2O4, Sn3(PO4)4
Answer:
The molecular formula is Sn3(PO4)4.
Explanation:
The molecular formulas are:
Na2SO4: Sodium sulfate
C6H5Cl: Chlorobenzene
N2O4: Dinitrogen tetroxide
Sn3(PO4)4: Tin(IV) phosphate
These are all chemical compounds represented by their molecular formulas.
Conclusion Using complete sentences, write a conclusion that addresses the following: • The purpose of the lab, what you explored, what you learned • An explanation of how percent yield can be affected during experimentation • A description of the sources of errors that impacted your data measurements
The purpose of this lab was to explore the concept of percent yield and to determine how it can be affected during experimentation. We learned that percent yield is the ratio of the actual yield of a product.
What is ratio?Ratio is a mathematical comparison of two related values or quantities. It is expressed as a fractional relationship, such as "2 to 4," "1:4," or "2/4." In mathematics, ratios are used to make comparisons between two or more quantities. Ratios can be used to measure how one quantity is related to another, or to compare two or more items. For example, if a person weighs 120 pounds and their height is 5 feet, the ratio of their weight to their height is 120:5 or 24:1. Ratios can also be used to compare items in different categories, such as the number of people in a group to the number of cars they own, or the number of apples to oranges in a basket.
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2.62 Predict the chemical formulas of the compounds formed by the following pairs of ions: (a) Cr3+ and Br, (b) Fe3+ and O2, (c) Hg22+ and CO2, (d) Ca2+ and CIO3, (e) NH4+ and PO³
Answer:
(a) Cr3+ and Br- will form CrBr3 (chromium(III) bromide)
(b) Fe3+ and O2- will form Fe2O3 (iron(III) oxide)
(c) Hg22+ and CO32- will form Hg2CO3 (mercury(I) carbonate)
(d) Ca2+ and ClO3- will form Ca(ClO3)2 (calcium chlorate)
(e) NH4+ and PO43- will form (NH4)3PO4 (ammonium phosphate)
Explanation:
chatGPT
The chemical formulas for the compounds formed by the given pairs of ions are: (a) CrBr3, (b) Fe2O3, (c) Hg2(CO3)2, (d) Ca(ClO3)2, and (e) (NH4)3PO4.
Explanation:(a) Cr3+ and Br- : In order to form a neutral compound, the charges of the ions must balance. The charge of Cr3+ is 3+ and the charge of Br- is 1-. To balance the charges, we need three Br- ions for every Cr3+ ion. Therefore, the chemical formula is CrBr3.
(b) Fe3+ and O2- : The charge of Fe3+ is 3+ and the charge of O2- is 2-. To balance the charges, we need two O2- ions for every Fe3+ ion. Therefore, the chemical formula is Fe2O3.
(c) Hg22+ and CO2- : The charge of Hg22+ is 2+ and the charge of CO2- is 2-. The charges are already balanced, so no extra ions are needed. Therefore, the chemical formula is Hg2(CO3)2.
(d) Ca2+ and ClO3- : The charge of Ca2+ is 2+ and the charge of ClO3- is 1-. To balance the charges, we need two ClO3- ions for every Ca2+ ion. Therefore, the chemical formula is Ca(ClO3)2.
(e) NH4+ and PO3- : The charge of NH4+ is 1+ and the charge of PO3- is 3-. To balance the charges, we need three NH4+ ions for every PO3- ion. Therefore, the chemical formula is (NH4)3PO4.
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CAN SOMEONE HELP WITH THESE QUESTIONS?✨
Hello there! Here are the answers you're looking for!
1: displacement reaction
2: (I can't really answer this one for you because i don't know what the items you used in your lab were, But ill just say Highly Toxic Chemicals)
3: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
4: (same thing here, i don't know what your lab was about! So i cant answer how it was used here.)
Sorry, i could not answer 2 of them, But hopefully, you get a good grade! Hope this helps!!
what is the volume of 225 moles of a gas at STP
Answer:
At STP (Standard Temperature and Pressure), the temperature is 273.15 K (0°C) and the pressure is 1 atm. The molar volume of any gas at STP is 22.4 L/mol.
Explanation:
Therefore, the volume of 225 moles of gas at STP would be:
V = n * V_m
where
V = volume of the gas
n = number of moles of the gas
V_m = molar volume of the gas at STP = 22.4 L/mol
Substituting the values, we get:
V = 225 mol * 22.4 L/mol
V = 5040 L
So the volume of 225 moles of a gas at STP would be 5040 liters.
Answer:
5049 L
Explanation:
got the answer correct
How much heat is transferred when the temperature of 36.4g of aluminum
is raised from 32.5°C to 71.6°C?
The amount of heat transferred would be 1269.67 J.
Heat transfer calculationTo calculate the heat transferred (q), we can use the specific heat capacity (c) of aluminum, which is 0.903 J/g°C, the mass of aluminum (m), and the change in temperature (ΔT):
q = m x c x ΔT
where ΔT = (final temperature - initial temperature)
Substituting the given values, we get:
ΔT = 71.6°C - 32.5°C = 39.1°C
m = 36.4 g
c = 0.903 J/g°C
q = 36.4 g x 0.903 J/g°C x 39.1°C
q = 1269.67 J
Therefore, the heat transferred when the temperature of 36.4g of aluminum is raised from 32.5°C to 71.6°C is 1269.67 J.
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How many grams are in 8.18 x 1023 atoms of nickel (Ni)?
Answer:
gram of Ni = 79.8g
Explanation:
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How do the types and numbers of atoms that repeat to make up a substance affect its properties?
Answer:
Explanation:
The types and numbers of atoms that repeat to make up a substance, which is also known as its chemical composition, have a significant impact on the substance's properties.
For example, the number of atoms in a molecule can affect its mass and density, as well as its reactivity with other substances. The types of atoms present can affect the chemical reactivity, melting and boiling points, and other physical properties of the substance.
Additionally, the arrangement of atoms in a molecule can also affect its properties. For example, the orientation of atoms can affect the molecule's polarity, which can affect its solubility in different solvents.
In summary, the types and numbers of atoms that repeat to make up a substance can have a significant impact on its properties, including its chemical and physical properties.