Skip to main content
Ch.10 - Gases: Their Properties & Behavior
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145당신이 사용하는 게 아니라요?교과서 변경
모든 교과서McMurry 8th EditionCh.10 - Gases: Their Properties & Behavior문제 72a
10장, 문제 72a

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s) + 2 HCl(aq) ¡ ZnCl2(aq) + H2(g) (a) How many liters of H2 would be formed at 742 mm Hg and 15 °C if 25.5 g of zinc was allowed to react?

검증된 단계별 안내
1
Determine the number of moles of zinc (Zn) using its molar mass.
Use the stoichiometry of the balanced chemical equation to find the moles of hydrogen gas (H_2) produced.
Convert the temperature from Celsius to Kelvin by adding 273.15 to the Celsius temperature.
Use the ideal gas law, PV = nRT, to solve for the volume of hydrogen gas (H_2) in liters. Remember to convert pressure from mm Hg to atm by dividing by 760.
Substitute the known values into the ideal gas law equation and solve for the volume of H_2.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
4m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced chemical equation. In this case, the balanced equation shows that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. Understanding stoichiometry allows us to determine the amount of hydrogen gas produced from a given mass of zinc.
추천 영상:
가이드 코스
01:16
Stoichiometry Concept

Ideal Gas Law

The Ideal Gas Law relates the pressure, volume, temperature, and number of moles of a gas through the equation PV = nRT. This law is essential for calculating the volume of hydrogen gas produced under specific conditions of pressure and temperature. By rearranging the equation, we can solve for volume when the number of moles of hydrogen is known.
추천 영상:
가이드 코스
01:15
Ideal Gas Law Formula

Gas Laws and Conditions

Gas laws describe the behavior of gases under various conditions. In this problem, we need to consider the pressure (742 mm Hg) and temperature (15 °C) to find the volume of hydrogen gas produced. Converting temperature to Kelvin and pressure to atmospheres may be necessary to apply the Ideal Gas Law correctly, ensuring accurate calculations.
추천 영상:
가이드 코스
01:43
Combined Gas Law
관련 실천
교과서 질문
Ammonium nitrate can decompose explosively when heated according to the equation 2 NH4NO31s2¡2 N21g2 + 4 H2O1g2 + O21g2 How many liters of gas would be formed at 450 °C and 1.00 atm pressure by explosion of 450 g of NH4NO3?
939
views
교과서 질문
The reaction of sodium peroxide 1Na2O22 with CO2 is used in space vehicles to remove CO2 from the air and generate O2 for breathing: 2 Na2O21s2 + 2 CO21g2¡2 Na2CO31s2 + O21g2 (a) Assuming that air is breathed at an average rate of 4.50 L/min (25 °C; 735 mm Hg) and that the concentration of CO2 in expelled air is 3.4% by volume, how many grams of CO2 are produced in 24 h?
921
views
교과서 질문

What are the molecular weights of the gases with the following densities: (a) 1.342 g/L at STP

470
views
교과서 질문

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn(s) + 2 HCl(aq) ¡ ZnCl2(aq) + H2(g) (b) How many grams of zinc would you start with if you wanted to prepare 5.00 L of H2 at 350 mm Hg and 30.0 °C?

960
views
교과서 질문

What are the molecular weights of the gases with the following densities: (b) 1.053 g/L at 25 °C and 752 mm Hg

506
views