객관식
What is the molar mass of CaCl_2?
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2. Atoms & Elements
Calculating Molar Mass
객관식
What is the molar mass of hydrogen gas (H_2)?
A
1.01 g/mol
B
2.02 g/mol
C
28.02 g/mol
D
18.02 g/mol
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검증된 단계별 안내1
Identify the chemical formula of hydrogen gas, which is \(\mathrm{H_2}\), meaning it consists of two hydrogen atoms bonded together.
Recall the atomic mass of a single hydrogen atom, which is approximately 1.01 g/mol.
Calculate the molar mass of hydrogen gas by multiplying the atomic mass of hydrogen by the number of atoms in the molecule: \(2 \times 1.01\ \mathrm{g/mol}\).
Express the molar mass as the sum of the masses of the two hydrogen atoms, which gives the total molar mass of \(\mathrm{H_2}\).
Conclude that the molar mass of hydrogen gas is approximately 2.02 g/mol based on the calculation.
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