According to the ideal gas equation, the pressure of 8.88 mole of helium gas at 20.0° C and 180 L volume is 111.97 atmospheres.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
According to the ideal gas equation , PV=nRT substitution gives P= 8.88×8.314×273/180=111.97 atmospheres.
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Positive ∆H means that the reaction tends to go forwards.
Negative ∆H means that the reaction tends to go in reverse.
Group of answer choices
True. Positive means forwards and negative means reverse.
False. Atoms want to be in the lowest energy state.
The statement "Positive ∆H means that the reaction tends to go forwards. Negative ∆H means that the reaction tends to go in reverse" is generally true.
What are the types of reactions?When the enthalpy change is positive, the reaction is endothermic, which means that heat is taken in by the system from the environment. When the reaction progresses towards a more stable state with lower energy, this often leads to a rise in the energy of the reactants and an increase in the possibility that the reaction will proceed further.A negative H, on the other hand, denotes an exothermic process, in which the system releases heat into the environment. The energy of the reactants normally decreases as a result and the possibility that the reaction will proceed in the other direction as it progresses towards a more stable state with lower energy increases.learn more about ∆H here
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PLEASE HELP! Balance the following chemical equation by adding the correct coefficients
Answer:
Zn + 2HCl => ZnCl2 + H2
Explanation:
Zn + 2HCl => ZnCl2 + H2
1 Zn +
2 HCl =>
1 ZnCl2 +
1 H2
If you increase the amount of fiber in a product, the total carbs in the product
Carbs are not negated by fibre, but high-fiber diets are normally digested more slowly, decreasing the likelihood that they will be stored as body fat.
What happens when you consume more fibre?A high-fiber diet seems to lower the chance of acquiring a number of illnesses, including colon cancer, diverticular disease, heart disease, diabetes, and diverticular disease. Fiber is crucial for decreasing cholesterol and maintaining intestinal health.
Does the sum of your carbohydrates include fibre?All three forms of carbohydrates—sugar, starch, and fiber—are listed as total carbohydrates on the label. Whether calculating your carb intake or selecting which items to include, it's critical to use the total grammes.
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Calculate the number of miles in 20g of neon
The number of moles in 20g of Ne is 1 mole.
What is a 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,
Mass of Ne = 20g
Molar mass of Ne = 20 g/mole
Moles = mass ÷ molar mass
= 20 ÷ 20
= 1 mole
Therefore, the number of moles in 20g of Ne is 1 mole.
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The question has spelling mistake. Probably the question is:
Calculate the number of moles in 20g of neon.
When carbon dioxide is dissolved in an aqueous solution of sodium hydroxide, the mixture reacts to yield aqueous sodium carbonate and liquid water. Write balanced molecular, complete ionic, and net ionic equations for this process.
Na2CO3(aq) and H2O are produced by the reactions CO2(aq) + NaOH(aq) and CO2(aq) + 2NaOH(aq). (l) When carbon dioxide is dissolved in a sodium hydroxide aqueous solution,
what is an aqueous solution?Definition. In an aqueous solution, liquid water acts as the solvent. In other words, water molecules surround and incorporate the ions and molecules that make up the solute (dissolved) into their network of links. The dissolved organisms then spread out throughout the water.
Is water a water solution?Water and one or more dissolved substances make up aqueous solutions. In an aqueous solution, solids, gases, or other liquids can all dissolve. For a combination to be taken seriously as a solution, it must be stable.
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If 10 J of heat is added to 2 g of gold, how much does the temperature increase? The specific heat of gold is 0.129 J/(g·°C)
Answer:
you can use the formula for heat capacity to calculate the change in temperature:
Q = m * c * ΔT
where Q is the heat added, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
Plugging in the values given, we get:
10 J = 0.002 kg * 0.129 J/(g·°C) * ΔT
Simplifying and solving for ΔT, we get:
ΔT = 10 J / (0.002 kg * 0.129 J/(g·°C))
ΔT = 308.53 °C
Therefore, the temperature of the gold increases by approximately 308.53 °C when 10 J of heat is added to 2 g of gold.
The gaseous production of a reaction is collected in a 25.0l container at 27c. The pressure of the container is 300.0 kpa and the gas has a mass of 96.0 g. What is the formula mass of the gas?
Answer:
To determine the formula mass of the gas, we can use the ideal gas law:
PV = nRT
where P is the pressure of the gas, V is the volume of the container, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.
First, we need to convert the given temperature of 27°C to Kelvin:
T = 27°C + 273.15 = 300.15 K
Next, we can rearrange the ideal gas law to solve for the number of moles of gas:
n = PV/RT
where P = 300.0 kPa, V = 25.0 L, R = 8.31 J/(mol·K), and T = 300.15 K.
n = (300.0 kPa)(25.0 L)/(8.31 J/(mol·K) x 300.15 K) ≈ 30.12 mol
Now, we can calculate the molar mass (formula mass) of the gas using its mass and the number of moles:
molar mass = mass / number of moles
where the mass is given as 96.0 g.
molar mass = 96.0 g / 30.12 mol ≈ 3.19 g/mol
Therefore, the formula mass of the gas is approximately 3.19 g/mol.
Explanation:
Answer:
3.19
Explanation:
What percent of glucose, C6 H 12 O6, is carbon?
Answer:
The percentage of zinc in the compound; Zn3(PO4)2 is 50.65%.
If 5.00 g of sodium chloride is dissolved in 20.0 mL of solution at room temperature, is the solution saturated,supersaturated, or unsaturated? (The molarity of a saturated NaCl solution at room temperature is 5.98 M.)
Answer:
First, we need to calculate the molarity of the solution:
Molarity = moles of solute / liters of solution
We know the mass of solute (5.00 g) and the volume of solution (20.0 mL = 0.0200 L). To find the moles of solute, we need to divide the mass by the molar mass of NaCl:
moles of NaCl = 5.00 g / 58.44 g/mol = 0.0855 mol
Now we can calculate the molarity:
Molarity = 0.0855 mol / 0.0200 L = 4.28 M
The molarity of the solution is less than the molarity of a saturated NaCl solution at room temperature (5.98 M), so the solution is unsaturated.
4. In an experiment, 170.9 g of C_{2}*H_{4} was reacted with 52.75L of , 64.1 g of C*O_{2} is produced .What is the limiting reagent? ) What is the percent yield of this reaction?
C2H4 is the limiting chemical because the ratio of C2H4 to O2 is below the stoichiometric ratio.and the reaction's percent yield is 40.7%.
What is the limiting reagent?The limiting reagent or reactant in a chemical process is the one that controls how much product is created. Because elements and compounds respond in an equilibrium chemical formula according to their mole ratios, a limiting reactant is necessary.
C2H4 + O2 CO2 + H2O can be used to calculate the limiting reagent and percent output.
C2H4 has a mass of 170.9 g.
O2 has an overall volume of 52.75 L.
The amount of CO2 generated is 64.1 g.
Calculating the amounts (in moles) of each reactant and comparing them to the stoichiometric ratio in the balanced solution will help us identify the limiting reagent.
The molecular mass of C2H4 can be used to determine how much is present:
17.9 g C2H4 divided by (2 x 12.01 g/mol + 4 x 1.01 g/mol) results in 3.58 mol C2H4.
The ideal law of gases can be used to determine the quantity of O2:
PV/RT equals (1 atm)(52.75 L)/(0.0821 L atm/mol K)(298 K) = 2.16 mol O2 for n(O2).
Then, C2H4:O2 = 3.58 mol; 2.16 mol; 1.66 mol; 1
C2H4 to O2 stoichiometric ratio is 1 to 3.
C2H4 is the limiting reactant because the ratio of C2H4 to O2 is lower than the stoichiometric ratio. This implies that the O2 will exhaust itself completely before the C2H4 does as well.
We can use the mole fraction of C2H4 to CO2 in the balanced equation to calculate the potential yield of CO2:
1 mol C2H4 results in 1 mol CO2.
Theoretically, 3.58 mol C2H4 1 mol CO2/1 mol C2H4 44.01 g/mol = 157.3 g CO2 is the output of CO2.
To determine the percent yield, multiply the result by 100% after dividing the real yield by the theoretical yield:
(Actual yield / Theoretical yield) / 100% = Percent return
The amount of CO2 that actually occurred is 64.1 g. The percent yield is therefore: Percent yield = (64.1 g/157.3 g) 100% = 40.7%
As a result, C2H4 serves as the limiting reactant, and the reaction's percent yield is 40.7%.
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how high above saturns surface is the cassini satellite?
Answer:
1,915 kilometres above Saturn's surface
The 700 meter's high above Saturn's surface is the Cassini satellite.
What is Saturn?
It is a gas giant with a typical radius that is roughly nine times that of the Earth. Although having only one-eighth the density of the Earth on average, Saturn is nearly 95 times more massive due to its enormous bulk.
What is Cassini satellite?The most ambitious planetary space exploration project ever launched is the Cassini mission to Saturn. The Cassini mission, a collaboration between NASA, the European Space Agency (ESA), and the Italian space agency Agenzia Spaziale Italiana (ASI), launched an advanced robotic spacecraft into orbit around the ringed planet.
Therefore, The 700 meter's high above Saturn's surface is the cassini satellite.
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Why are coal, oil, and natural gas all classified as "fossil" fuels? Responses They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay. They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay. Radioactive dating estimates the age of the organisms as formed from to prehistoric times. Radioactive dating estimates the age of the organisms as formed from to prehistoric times. They often contain the impressions of organisms when removed from the ground. They often contain the impressions of organisms when removed from the ground. They are all formed from ancient inorganic material that was covered by seawater for millions of years.
They are all formed from ancient organic material that was buried under many layers of sediment and not allowed to decay.
What are organic materials?
Organic materials are those that contain carbon and hydrogen atoms. These materials are typically derived from living organisms or their remains, such as plants and animals. Organic materials can be found in various forms such as solids, liquids, and gases. Some examples of organic materials include wood, paper, cotton, wool, leather, petroleum, and natural gas. These materials are used in a wide range of applications, from building construction to clothing production to energy generation.To know more about organic materials, click the link given below:
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How much water, in grams, can be made from 8.73 × 10^24 hydrogen molecules?
Explanation:
Refer to pic..........
A 75 kg Skydiver is spotted at a height of 1000 m above the Earth's surface how much GPE does the skydiver possess
Answer:
735,000
Explanation:
75 × 9.8
Please help!
(Thank you so much 2 more after this)
How many protons, neutrons,
and electrons are in this ion?
204 Hg2+
80
A. 80 pt, 124 nº, 80 e-
B. 80 pt, 124 n°, 82 e-
C. 102 p¹, 102 nº, 104 e-
D. 80 p+, 124 nº, 78 e-
Answer:
D. 80 p+, 124 nº, 78 e-
Explanation:
The atomic number of mercury (Hg) is 80, which means it has 80 protons and 80 electrons in a neutral atom. The ion given is Hg2+ which means it has lost two electrons, so the number of electrons is now 80 - 2 = 78.
The mass number of mercury is 204, which means it has 204 nucleons in its nucleus. Since the ion is Hg2+, there are two mercury atoms present. Therefore, the total number of protons is 2 × 80 = 160, and the total number of neutrons is 204 - 160 = 44.
So the answer is D) 80 p+, 124 nº, 78 e-
Determine if the following reaction is a redox reaction; if it is, select the correct overall oxidation-reduction reaction. (You may need to use Tables A-1, A-2, A-3, and A-4 in your CRG for oxidation numbers.)
N2(g) + 3H2(g) - 2NH3(g)
Indeed, 2N + 2H results from n2 + 3H2.An oxidation reaction is a process that involves chemical addition of oxygen, and a reduction reaction is a process that involves a removal of oxygen.
How can you tell if a response is redox in nature?Redox reactions are those in which there is a change in the oxidation number, with both a gain and a drop in number.The reaction called non-redox if this fails to take place.
How can a redox reaction be differentiated between oxidation and reduction?You must figure out each atom's oxidation values prior to and following the reaction in order to identify what happens toward which elements inside a redox reaction.The prospective charge of the an atom in its cationic state is represented by oxidation numbers.In a reaction, an atom is reduced if its oxidation number falls.
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Why did von Helmont think that plants get their nourishment from soil?
Von Helmont think that plants get their nourishment from soil because he concluded an experiment and watered the plant after which he came to know that.
Plant growth is the ability of a plant to develop its roots in length, sets in length, and breadth in girth. Plant growth occurs in four phases. These stages are as follows...
Plant seeding, germination, and seedling formation all increase.
John Baptista van Helmont (1580-1644) contributed to the understanding of photosynthesis. He planted a willow tree in a measured amount of dirt. After five years, he observed that the willow tree weighted around 74 kg more than it did when he first planted it. Van Helmont decided that plant development could not be solely attributable to soil minerals because the weight of the soil had scarcely altered. He assumed that the increased plant material had come only from the water.
For the first time, this invalidated the Ancient Greeks' earlier idea that plants grew bulk by absorbing minerals from the earth. Van Helmont was the first to put this theory to the test and discover it to be false.
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which of the following compounds would form precipitates in an aqueous solution? NaCN, Na2CO3, FeSO4, ZnS, Ca(OH)2, CuCO3
The compounds that would form precipitates are; CuCO3 and Ca(OH)2 and ZnS
Why do some compounds form precipitates in aqueous solution?Some compounds form precipitates in aqueous solutions because their solubility decreases as the temperature or concentration of the solution changes. When the solubility limit of the compound is reached, the excess solid particles will no longer dissolve and will start to form a solid precipitate.
Precipitation reactions can be useful in analytical chemistry for detecting and identifying ions in solution. They can also be used in industrial processes, such as the purification of metals and the removal of impurities from wastewater.
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What is the pH of a solution that has a [OH-] = 5.8 x 10^-9
A. 8.2
B. 5.8
C. 9.8
D. 4.2
The pH of a solution that has a [OH-] = 5.8 x 10⁻⁹ is 5.76.
What is pH?
A pH scale is a tool for measuring acids and bases. The scale ranges from 0-14. Range of 0-6 represents acids and range of 8-14 represents bases. The value of pH 7 represents neutral solution.
pH = -log [H+]
Also, pH = 14 - pOH
Given,
[OH-] = 5.8 x 10⁻⁹
pOH = -log [OH-]
pOH = 9 - 0.763 = 8.23
Hence, pH = 14 - 8.23 = 5.76
Therefore, the pH of a solution that has a [OH-] = 5.8 x 10⁻⁹ is 5.76.
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If there were tides on Jupiter; a. based only on the mass of its moon, which moon would have the greatest influence on the Jupiter tides?
Explanation:
If there were tides on Jupiter, the moon with the greatest influence on the Jupiter tides would be the moon with the greatest mass and closest distance to Jupiter.
please help and put explanation please
By placing a thermometer throughout the reaction mixture to observe temperature changes, endothermic and exothermic reaction can be identified.
What are endothermic and exothermic reaction?Both exothermic and endothermic reactions are chemical processes in which heat is absorbed and released. Photosynthesis is a nice example of such an endothermic process. An example of just an exothermic process is combustion.
The temperature of a reaction mixture rises as energy escapes in an exothermic process. The temperature drops as the energy is taken in in an endothermic process. Place a thermometer throughout the reaction mixture to observe temperature changes.
Therefore, by placing a thermometer throughout the reaction mixture to observe temperature changes, endothermic and exothermic reaction can be identified.
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Dicarbon heptoxide formula is…
A. C70₂
B. C₂07
C. CO
D. 2C70
Answer: B
Explanation:
dicarbon means 2 carbons
Heptoxide = hept means 7
thus C2O7
SEP Plan an Investigation Plan an investigation to determine the percentage by mass of cashews and almonds in a jar of mixed nuts
the percent by mass of cashews and almonds can be determined by the Percentage by mass of X = (mass of X / total mass of mixed nuts) x 100%
A possible plan to determine the percentage by mass of cashews and almonds in a jar of mixed nuts could be:
Obtain a sample of the mixed nuts and weigh it to determine the total mass of the sample.
Separate the cashews and almonds from the rest of the nuts in the sample.
Weigh the separated cashews and record the mass.
Weigh the separated almonds and record the mass.
Calculate the percentage by mass of cashews and almonds in the mixed nuts by using the following formulas:
Percentage by mass of cashews = (mass of cashews / total mass of mixed nuts) x 100%
Percentage by mass of almonds = (mass of almonds / total mass of mixed nuts) x 100%
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I am unable to solve this problem.
The dry hydrogen gas would occupy 0.152 L at 1 atm and 298 K when solving with the combined gas equation.
What is combined gas equation?It is a mathematical expression that states the relationship between the pressure, volume, and temperature.
The gas equation can be stated as:
(P₁V₁)/T₁ = (P₂V₂)/T₂
To solve this problem, we need to use the combined gas law:
We are given the initial pressure (707.3 Torr), but we need to calculate the initial volume and temperature of the hydrogen gas.
P_total = P_H₂ + P_H₂O
where P_H₂ is the pressure of the hydrogen gas and P_H₂O is the vapor pressure of water at 10 °C (9.21 Torr).
P_total = 707.3 Torr
P_H₂O = 9.21 Torr
So, P_H₂ = P_total - P_H₂O = 698.09 Torr
Converting the volume of hydrogen gas collected to the volume at standard temperature and pressure (STP) using the following equation:
V₂ = V₁(P₁/P₂)(T₂/T₁)
Solving for V₁ by rearranging the equation:
V₁ = V₂(P₂/P₁)(T₁/T₂)
Converting the volume of hydrogen gas collected to liters:
V₂ = 125 mL = 0.125 L
Next, we can putting in the values we know:
P₁ = 698.09 Torr
P₂ = 1 atm = 760 Torr
T₂ = 298 K
We can solve for T₁ by using the ideal gas law:
PV = nRT
T = PV/nR
Calculating the number of moles of hydrogen:
n = m/M
n = 0.4 g / 65.38 g/mol = 0.006118 mol
Now we can put in the values we know into the ideal gas law:
T₁ = (P₁V₁)/(nR)
= (698.09 Torr)(0.125 L)/(0.006118 mol)(0.08206 L·atm/mol·K)
= 343.2 K
Finally, we can solve for V₁:
V₁ = V₂(P₂/P₁)(T₁/T₂)
= (0.125 L)(760 Torr/698.09 Torr)(343.2 K/298 K) = 0.152 L
Therefore, the dry hydrogen gas would occupy 0.152 L at 1 atm and 298 K.
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How are cellular respiration and photosynthesis related?
A.
They both use ATP energy to produce radiant energy.
B.
They both use light energy to produce chemical energy.
C.
All of their chemical products are gases found in the atmosphere.
D.
The chemical products of one are the reactants of the other.
Answer:
I'm pretty sure its A
Explanation:
I hope this helps
You are given 100 grams of some unknown pure substance. You are told that that sample contains 0. 4892767658 mol of this substance. What is the substance? (Show work)
With the substance's molar mass in hand, we can use a periodic table or chemical database to look up potential candidates.
We must know the substance's molar mass in order to identify it. By dividing the mass of the sample by the number of moles in the sample, we may determine the molar mass:
Molar mass is equal to the mass of the sample divided by the number of moles.
100 g molar mass = 0.4892767658 mol
204.54 g/mol for the molar mass
With the substance's molar mass in hand, we can use a periodic table or chemical database to look up potential candidates. The substance might be sodium chloride (NaCl), calcium phosphate (Ca3(PO4)2), or many other chemicals with a comparable molar mass, depending on the molar mass.
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Restate this using moles: “I have 6.02x10 23 baseballs.”
Answer: " I have one mole of baseballs "
Explanation:
In the spring, Florida plants respond to ________.
increased daylight hours and temperature
decreased daylight hours and temperature
increased daylight hours and decreased temperatures
decreased daylight hours and increased temperatures
The answer is (A), Greater growth and activity are seen in plants during Florida's spring season, which is mainly caused by a combination of two environmental factors: longer daylight hours and warmer temperatures.
What kinds of flora can you find in Florida?The Atlas of Florida Vascular Plants estimates that Florida is home to more than 4,200 plant varieties that are not grown in cultivation. Nearly 3,000 of those 4,200 species are regarded as local. The bulk of plants are terrestrial, or land-based.
What blossom is unique to Florida?One of the cheeriest plants you can cultivate in your garden is the coreopsis, the official state flower of Florida. However, plant breeders have been hard at work and you can now find choices with single or double flowers, or blooms in hues of gold, yellow, and even orange, red, and pink.
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2KClO3 → 2KCl + 3O2
Use this balanced chemical equation (the decomposition of potassium chlorate that produces potassium chloride and oxygen gas) to solve the following problems. Show all work and answer with the correct units and significant figures.
a. How many moles of oxygen gas are produced if 4 moles of potassium chlorate decomposes?
b. If 4.50 moles of potassium chloride are produced, what mass of oxygen gas is produced?
c. If 5.0 g of potassium chlorate decomposes, how many grams of potassium chloride are produced?
Consequently, 4.50 milligrams of KCl yields 216 g of O2 from 4 moles of KClO3, which in turn produces 6 mole of O2. Potassium chloride is created in amounts of 0.0408 mol KCl.
What circumstances necessitate mole concern?A suspicious mole, on the other hand, is asymmetrical, that means that when it is split in half, its two sides have a different appearance. The typical characteristic of benign moles is circular borders. Wavy borders are frequently seen on moles that have malignancy. If the border isn't smooth, get your belongings out of there.
2 mol KClO3 / 3 mol O2, which equals 4 mol KClO3 / x.
The answer to the equation for x is: x = (3 mol O2 4 mol KClO3) / 2 mmol KClO3 = 6 mol O2.
As a result, 4 moles ions KClO3 result in 6 moles of O2.
2.50 mol KClO3 / 2.50 mol KCl = 2.50 mol KClO3 / x
The to the equation for x is: x = (2 mol KCl 4.50 mol KClO3) / 2 mol KClO3 = 4.50 mol KCl.
We can calculate the amount of O2 produced using the mole fraction of KClO3 to O2 now that we know humans have 4.50 mole of KCl:
2.50 mol KClO3/3.0 mol O2 ≈ 4.50 mol KClO3/x
In order to find x, we must divide 3 mol O2 by 4.50 mol KClO3 and 2 mol KClO3 by 6.75 mol O2.
In order to translate from moles to grams, we can utilize the molecular concentration of oxygen:
216 g O2 is produced by multiplying 6.75 mol O2 by 32.00 g/mol.
Hence, 216 g of O2 are created from 4.50 moles of KCl.
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A 1. 00-L vessel at 400 °C contains the following equilibrium concentrations: N2, 1. 00 M; H2, 0. 50 M; and NH3, 0. 25 M. How many moles of hydrogen must be removed from the vessel to increase the concentration of nitrogen to 1. 1 M? The equilibrium reaction is
N2(g)+3H2(g)⇌2NH3(g)
The number of the moles of hydrogen must be removed from the vessel to increase the concentration of nitrogen to 1. 1 M is 0.334 mol.
The chemical equation is as follows :
N₂ (g) + 3H₂ (g) ⇄ 2NH₃ (g)
Initial 1.00 M 0.50 M 0.25 M
Change + 0.1 -0.1 M
Eq. 1.1 M x 0.05 M
The equilibrium concentration is as :
Kc = [NH₃]² / [ N₂ ] [H₂]³
Kc = (0.25)² / (1) (0.50)³
of Kc = 0.50
Kc = [NH₃]² / [ N₂ ] [H₂]³
0.50 = (0.05)² / (1.1) (x)³
x = 0.166 M
The number of the moles of the hydrogen removed = 0.50 - 0.166
The number of the moles of the hydrogen removed = 0.334 mol of H₂.
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