The mass of one mole of nitrogen gas is 28.0 g.

Question

BlackTom AI · Accepted Answer

Consider the statement about the molar mass of nitrogen gas. 
Option 1: True. The chemical formula for nitrogen gas is N2, and the atomic mass of a single nitrogen atom is about 14.01 g/mol. Doubling that for the diatomic molecule gives a molar mass of roughly 28.02 g/mol, which is commonly rounded to 28.0 g/mol when appropriate significant figures are used. Therefore, stating that the mass of one mole of nitrogen gas is 28.0 g is consistent with standard rounding conventions. 
Option 2: False. If one insisted that the molar mass must be exactly 28.02 g/mol with no rounding, this would be technically precise, but in typical chemistry contexts molar masses are given to a reasonable number of significant figures. A value of 28.0 g/mol is an acceptable rounded representation, not an incorrect one. However, if the expectation were an exact 28.02 g/mol without rounding, then 28.0 g would be considered an approximation, not an exact value. 
In summary, the statement aligns with common rounding practices for the molar mass of N2, making True the suitable choice under standard educational conventions. If precision to two decimals were mandated, one might expect 28.02 g/mol; with typical sig figs, 28.0 g/mol is acceptable.

The mass of one mole of nitrogen gas is 28.0 g.

查看解析

登录即可查看完整答案

类似问题

Which sample will have the greatest mass?

What is the mass of 91.4 moles of NH3 molecules?

The molar mass for H is 1 and for He is 4. What is the ratio of the molar mass of He to that of H2?

Find the molar mass of ethanol, C 2 H 6 O C 2 H 6 O . BlackTom题目解析

Q13 V20.0438 mol of an organic compound has a mass of 1.84 g. The compound is likely to be an:

Which of the following has the lowest mass?

3.0 g of a gas occupies the same volume as 1.0 g of methane gas, CH4, at the same temperature and pressure. The gas could be: [ Molar Masses (g mol-1) C = 12.0 H = 1.00 O = 16.0 N =14.0 ]

The molar mass of copper(II) sulfate, CuSO4, is 63.6 g.

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单