객관식
What is the molar mass of hydrogen gas (H_2)?
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2. Atoms & Elements
Calculating Molar Mass
객관식
What is the molar mass of formic acid (HCOOH)?
A
46.03 g/mol
B
44.01 g/mol
C
32.04 g/mol
D
60.05 g/mol
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검증된 단계별 안내1
Identify the chemical formula of formic acid, which is HCOOH.
List the atomic masses of each element involved: Hydrogen (H) ≈ 1.01 g/mol, Carbon (C) ≈ 12.01 g/mol, and Oxygen (O) ≈ 16.00 g/mol.
Count the number of each type of atom in the formula HCOOH: 2 Hydrogens, 1 Carbon, and 2 Oxygens.
Calculate the total mass contributed by each element by multiplying the atomic mass by the number of atoms: (2 × 1.01) for H, (1 × 12.01) for C, and (2 × 16.00) for O.
Add all these contributions together to find the molar mass of formic acid: total mass = mass of H + mass of C + mass of O.
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