Question

learning: molecules and compounds calculations
question ⓘ
the empirical formula is a chemical formula that provides the smallest, whole-number ratio of elements in a compound. using the mass of each element or the mass percentage of each element in a compound, the empirical formula can be determined.
what is the empirical formula for a substance containing 0.0923 grams of carbon, c, and 0.0077 grams of hydrogen, h?
answer
○ $c_2h_2$
○ $c_3h_8$
○ $ch_4$
○ $ch$
○ i dont know yet

Explanation:

Step1: Calculate moles of C

Molar mass of C = 12.01 g/mol.
$\text{Moles of C} = \frac{0.0923}{12.01} \approx 0.00769$ mol

Step2: Calculate moles of H

Molar mass of H = 1.008 g/mol.
$\text{Moles of H} = \frac{0.0077}{1.008} \approx 0.00764$ mol

Step3: Find mole ratio

Divide moles by the smaller value (0.00764).
$\text{Ratio of C} = \frac{0.00769}{0.00764} \approx 1$
$\text{Ratio of H} = \frac{0.00764}{0.00764} = 1$

Answer:

C. CH