객관식
A sample contains magnesium hydroxide. What is the molar mass of Mg(OH)_2?
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2. Atoms & Elements
Calculating Molar Mass
Multiple Choice
What is the molar mass of molecular hydrogen (H_2)?
A
1.01 g/mol
B
2.02 g/mol
C
16.00 g/mol
D
18.02 g/mol
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검증된 단계별 안내1
Identify the molecular formula of molecular hydrogen, 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 \(\mathrm{H_2}\) by multiplying the atomic mass of hydrogen by 2, since there are two hydrogen atoms in the molecule.
Express the calculation as: \(\text{Molar mass of } \mathrm{H_2} = 2 \times 1.01\ \mathrm{g/mol}\).
Sum the values to find the total molar mass of molecular hydrogen, which will be approximately 2.02 g/mol.
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