객관식
Nitrogen and hydrogen combine to form ammonia via the following reaction:
1 N2 (s) + 3 H2 (g) → 2 NH3 (g)
What mass of nitrogen is required to completely react with 800.0 mL H2 at STP?
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11 Gases
Standard Temperature and Pressure
1:47분문제 72
교과서 질문
What is the mass of CH₄ in a sample that occupies a volume of 16.5 L at STP?
검증된 단계별 안내1
Identify the conditions of STP (Standard Temperature and Pressure), which are 0°C (273.15 K) and 1 atm pressure.
Recall that at STP, 1 mole of any ideal gas occupies 22.4 L.
Use the volume of the CH₄ sample (16.5 L) to determine the number of moles of CH₄ using the formula: \( \text{moles of CH}_4 = \frac{\text{volume of CH}_4}{22.4 \text{ L/mol}} \).
Calculate the molar mass of CH₄. The molar mass of CH₄ is the sum of the atomic masses of one carbon atom (12.01 g/mol) and four hydrogen atoms (1.01 g/mol each).
Multiply the number of moles of CH₄ by the molar mass of CH₄ to find the mass of the sample: \( \text{mass of CH}_4 = \text{moles of CH}_4 \times \text{molar mass of CH}_4 \).
비슷한 문제에 대한 검증된 영상 답변:이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Molar Volume at STP
At standard temperature and pressure (STP), one mole of any ideal gas occupies a volume of 22.4 liters. This concept is crucial for converting between the volume of a gas and the number of moles, which is essential for calculating mass from volume.
추천 영상:
가이드 코스
00:53
Molarity
Molar Mass of CH₄
The molar mass of methane (CH₄) is the sum of the atomic masses of its constituent elements: carbon (C) and hydrogen (H). Specifically, the molar mass is approximately 16.04 g/mol, which allows for the conversion of moles of CH₄ into grams when calculating mass.
추천 영상:
가이드 코스
01:10Calculating Molar Mass
Ideal Gas Law
The ideal gas law, represented as PV = nRT, relates the pressure (P), volume (V), number of moles (n), the ideal gas constant (R), and temperature (T) of a gas. While not directly needed for this specific question, understanding this law provides a foundational framework for gas behavior and calculations involving gases.
추천 영상:
가이드 코스
01:15The Ideal Gas Law
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