Calculate the density of He gas at 1atm of pressure and 20.00C. Explain (using your calculated results) why Helium is used in modern day blimps.

Q: What is the density of a sample of argon gas at 55°C and 765mmHg?a) 2.99 g/L b) 1.13 * 103g/Lc) 1.49…

A: The given problem can be solved by using the formula as:  dRT=PM…

Q: A plastic bag is weighed and then filled successively with two gases, X and Y. The following data…

A: Given data contains: Temperature is 0.0°C (273 K)Pressure is 1.00 atmosphereMass of empty bag is…

Q: 10. LiOH is used to condition air in spacecraft by absorbing the carbon dioxide exhaled by…

A: According to the balanced equation, 2 moles LiOH can absorb 1 mole CO2.  We can convert the mass of…

Q: Calculate the change in volume of a 3.26 L sample of Argon, at 0.999 atm, that is heated from 22 oC…

A: Given data, Initial volume(V1)=3.26LInitial pressure(P1)=0.999atmInitial…

Q: A 3.35 g sample of an unknown gas at 23 C and 1.10 atm is stored in a 3.05 L flask. What is the…

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Q: A 1.00 L flask containing gas A at 3.00 atm is connected to a 6.00 L flask containing gas B at 1.00…

A: Gas is one of the most fundamental states of matter. It neither has a definite shape nor specific…

Q: To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as…

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Q: potassium chlorate is needed to produce 20.0 mL of oxygen gas at 700. mmHg and 20. °C? 1leent dlaite

A: Volume = 20 mL = 0.020 L Pressure = 700 mm Hg     = 700/760 = 0.921 atm Temperature = 20 °c = 293 K…

Q: Define the term Standard atmospheric pressure?

A: ANSWERE IS DISCUSSED BELOW :

Q: The three main components of dry air and the percentage of each are nitrogen (78.08%), oxygen…

A: The equation is, Ptotal = PN2 + PO2 + PAr   (760 mm hg = 760 torr) a) Partial pressure of N2 is, PN2…

Q: After dissolving an unknown tablet in water, the tablet dissolves and liberates a gas. Suppose at 1…

A: Given that:            Volume of gas (V) = 360 mL = 0.360 L               Temperature (T) = 20℃ =…

Q: Reaction Stoichiometry Involving Gases 71. Consider the chemical reaction: C(s) + H2O(8) CO(g) +…

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Q: Calculate the density of SF6 gas at 27.0°C and 1.00 atm pressure.

A: The empirical relationships among the volume, the temperature, the pressure, and the amount of a gas…

Q: A 1.65 g sample of an unknown gas at 55 °C and 1.00 atm is stored in a 2.45 L flask. What is the…

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Q: calculate the density of CO2 in g/L at 0.990 atm and 55C?

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Q: partial pressure

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Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: Sulfur trioxide, SO3, is produced in enormous quantities each year for use in the synthesis of…

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Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…

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Q: A 3.95 g sample of an unknown gas at 69 °C and 1.00 atm is stored in a 1.75 L flask. What is the…

A: The ideal gas equation relates the pressure, volume, temperature, and number of moles of gases of a…

Q: 5.41 A sample of a smokestack emission was collected into a 1.25-L tank at 752 mm Hg and analyzed.…

A: For 100 g sample, Mass of CO2 = 92 g Mass of NO = 3.6 g Mass of SO2 = 1.2 g Mass of water = 4.1 g

Q: A perfect gas undergoes isothermal compression, which reduces its volume by 2.20 L. The final…

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Q: b) The absolute temperature of a gas at which 6.79 X 10 ² moles occupies 164 mL at 893 torr. c) The…

A: Solution:      Idea gas equation shows a combined empirical relationship of volume,…

Q: If equal amounts of the four inert gases Ar, Ne, Kr and Xe are released at the same time at one end…

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Q: A sample of a smoke stack emission was collected into a 1.35-L tank at 742 mm Hg and analyzed. The…

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Q: 6. Calculate the density of hydrogen bromide (HBr) gas in grams per liter at 733 mm Hg and 46°C.

A: For the ideal gas, the temperature pressure and the volume are related by the ideal gas equation.…

Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…

A: Here, we have to write the balanced chemical equation for the decomposition of solid calcium…

Q: Consider the generic reaction: 2 A(g) + B(g)》2 C(g). If a flask initially contains 1.0 atm of A and…

A: Reaction proceeds to completion implies that almost all of the reactants are converted into product.…

Q: How many liters of fluorine gas are needed to form 541 L of sulfur hexafluoride gas if the following…

A: According to the balanced equation, it is observed that three moles of F2 reacts with one mole of…

Q: Calcium carbonate, CaCO3(s), the principal compound in limestone, decomposes upon heating to CaO(s)…

A: Given, P = 1.3 atm V = 250 mL T = 310C

Q: A 1.95 g sample of an unknown gas at 61 ∘C and 1.00 atm is stored in a 1.45 L flask. What is the…

A: Given information:Mass of sample = 1.95 gTemperature = 61 °CPressure of gas = 1.00 atmVolume of…

Q: Consider three gases all at 298 K: HCl, H2, and O2. List the gases in order of increasing average…

A: Observing the average speed expression shows that average speed is inversely proportional to the…

Q: As part of the rock analysis, a student added hydrochloric acid to a rock sample and observed a…

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Q: A 20.0 g sample of mercury(II) oxide (HgO, molar mass = 216.6 g/mol) is heated strongly, causing it…

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Q: Oxygen gas reacts with powdered aluminum according to the reaction:4 Al(s) + 3 O2(g) ------->2…

A: Given: Pressure= 782 mmHg= 782760atm=1.0289 atm Temperature= 25°C=25+273.15 K=298.15 K Mass of Al=…

Q: What is the molar volume of an ideal gas at 1.00atm and 0.00deg celsius?

A: Since its asking about molar volume. Hence calculating volume of 1 mole will give us the ans. Given…

Q: A 334-mL cylinder for use in chemistry lectures contains 5.225 g of helium at 23 °C. How many grams…

A: Given,Mass = 5.225 gMolar mass of helium is = 4.0 g/molVolume = 0.334 LTemperature = 23 oC = 273.15…

Q: A 4.17 g4.17 g sample of NH3NH3 gas and a 4.17 g4.17 g sample of HClHCl gas are mixed in a 2.00…

A: GIVEN: NH3 gas sample =  4.17 g HCl gas sample = 4.17g Volume of flask =2.00 L Temperature=25oC To…

Q: If pressure is expressed in atmospheres and volume is expressed in liters, PAVhas units of Latm…

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Q: The volume of gas in a container was originally 3.24L, while at standard pressure, 1.00atm. What…

A: Given information: V1 = 3.24 L P1 = 1.00 atm P2 = 1.20 atm

Q: A 3.25 g sample of an unknown gas at 37 °C and 1.00 atm is stored in a 1.85 L flask. What is the…

A: Mass of sample = 3.25 g Volume = 1.85 L Temperature = 37 ◦C or 310.15 K Pressure = 1 atm

Q: A 1.85 g sample of an unknown gas at 47 °C and 1.00 atm is stored in a 2.85 L flask. What is the…

A: Given: Mass, m =1.85 g Volume , V =2.85 L Pressure, P = 1.00 atm Temperature, T = 47 +273 = 320 K…

Q: What pressure permits 25.0 cm3 of neon at 735 mmHg to expand to a volume of 40.0 cm3?

A: The initial volume of neon, V1=25.0 cm3 The initial pressure of neon, P1=735 mmHg The final volume…

Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…

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Q: Real gases can exist under conditions other than STP. O True O False

A: Given: Real gases can exist under conditions other than STP.  To find: whether true or false…

Q: Given the following reaction: Mg(s) + 2 HCI(aq) MgCl2(aq) + H2(g) 9.49g of magnesium solid is placed…

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Q: What mass of nitrous oxide gas (N2O) is contained in 20.0 L balloon at a pressure of 110.0 kPa and a…

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Q: Consider the following samples of gases:If the three samples are all at the same temperature,…

A: NOTE- Since you've posted multiple sub-parts, we'll solve only the first three sub-parts for you. To…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.