Question

question ⓘ
molar mass is the mass of 1 mole, in grams, of a given substance. this results in the units of g/mol for molar mass. the number of grams is determined by adding up the atomic masses of the individual elements on the periodic table.
what is the molar mass of butane, $\text{c}_4\text{h}_{10}$?
answer
$\bigcirc$ 10.08 g/mol
$\bigcirc$ 58.12 g/mol
$\bigcirc$ 48.04 g/mol
$\bigcirc$ 13.02 g/mol
$\bigcirc$ i dont know yet

Explanation:

Step1: Get atomic masses from table

Atomic mass of C = $12.01\ \text{g/mol}$, Atomic mass of H = $1.008\ \text{g/mol}$

Step2: Calculate total mass of C

$\text{Total mass of C} = 4 \times 12.01 = 48.04\ \text{g/mol}$

Step3: Calculate total mass of H

$\text{Total mass of H} = 10 \times 1.008 = 10.08\ \text{g/mol}$

Step4: Sum masses for molar mass

$\text{Molar mass of } \text{C}_4\text{H}_{10} = 48.04 + 10.08 = 58.12\ \text{g/mol}$

Answer:

58.12 g/mol