Multiple Choice
What is the molar mass of chloroform (CHCl₃) given that a sample weighing 0.389 g is collected in a flask with a volume of 102 cm³ at 97°C and a pressure of 728 mmHg?
2. Atoms & Elements
Calculating Molar Mass
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What is the molar mass of aspirin (C9H8O4)?
A
180.16 g/mol
B
160.14 g/mol
C
150.13 g/mol
D
200.18 g/mol
Verified step by step guidance1
Identify the chemical formula of aspirin, which is C9H8O4.
Determine the atomic masses of carbon (C), hydrogen (H), and oxygen (O) from the periodic table: C = 12.01 g/mol, H = 1.01 g/mol, O = 16.00 g/mol.
Calculate the total mass of carbon in aspirin by multiplying the atomic mass of carbon by the number of carbon atoms: 9 × 12.01 g/mol.
Calculate the total mass of hydrogen in aspirin by multiplying the atomic mass of hydrogen by the number of hydrogen atoms: 8 × 1.01 g/mol.
Calculate the total mass of oxygen in aspirin by multiplying the atomic mass of oxygen by the number of oxygen atoms: 4 × 16.00 g/mol.
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