Question

now do the same for the hydrogen. convert moles h to g h. there are 0.012863485 mol h. how many grams of hydrogen are in the sample? ? g h this is not a final result. record at least six digits!

Explanation:

Step1: Recall molar mass of H

Molar mass of H is \( 1.00794 \, \text{g/mol} \).

Step2: Use mass = moles × molar mass

Mass of H \( = 0.012863485 \, \text{mol} \times 1.00794 \, \text{g/mol} \)
Calculate: \( 0.012863485 \times 1.00794 \approx 0.012965 \) (after precise calculation, keeping at least six digits: \( 0.012863485\times1.00794 = 0.012863485\times(1 + 0.00794)=0.012863485+0.012863485\times0.00794\approx0.012863485 + 0.000102136\approx0.012965621\))

Answer:

\( 0.0129656 \) (or more precise value with at least six digits, e.g., \( 0.01296562 \))