what is the percent composition by mass of hydrogen in NH4HCO3 (gram-formula mass = 79 grams/mole)?
Answer:The percent composition by mass of hydrogen in \(NH_4HCO_3\) is 6.32 %.
Explanation:
Molecular mass of the \(NH_4HCO_3\) = 79 g/mol
Mass of the hydrogen atom present in one formula unit of \(NH_4HCO_3\):
\(= 5\times \text{(atomic mass of hydrogen)}=5\times 1 g/mol= 5 g/mol}\)
\(\text{percentage of hydrogen}=\frac{\text{mass of the hydrogen in}NH_4HCO_3}{\text{molar mass of}NH_4HCO_3}\times 100\)
\(\text{percentage of hydrogen}=\frac{5g/mol}{79 g/mol}\times 100=6.32\%\)
The percent composition by mass of hydrogen in \(NH_4HCO_3\) is 6.32 %.