Questions: H3PO4 Express your answers using four significant figures. Enter your answers numerically separated by commas. mass % of H, P, O = %

Calculate the mass percent of each element in \( \mathrm{H}_{3} \mathrm{PO}_{4} \).

Determine the molar mass of \( \mathrm{H}_{3} \mathrm{PO}_{4} \).

The molar mass of \( \mathrm{H}_{3} \mathrm{PO}_{4} \) is calculated by summing the atomic masses of all atoms in the formula:

• Hydrogen (H): \( 3 \times 1.008 \, \text{g/mol} = 3.024 \, \text{g/mol} \)
• Phosphorus (P): \( 1 \times 30.97 \, \text{g/mol} = 30.97 \, \text{g/mol} \)
• Oxygen (O): \( 4 \times 16.00 \, \text{g/mol} = 64.00 \, \text{g/mol} \)

Total molar mass = \( 3.024 + 30.97 + 64.00 = 98.00 \, \text{g/mol} \).

Calculate the mass percent of hydrogen (\( \mathrm{H} \)).

The mass percent of hydrogen is calculated as:
\[ \left( \frac{3.024}{98.00} \right) \times 100\% = 3.0857\% \]

Calculate the mass percent of phosphorus (\( \mathrm{P} \)).

The mass percent of phosphorus is calculated as:
\[ \left( \frac{30.97}{98.00} \right) \times 100\% = 31.6020\% \]

Calculate the mass percent of oxygen (\( \mathrm{O} \)).

The mass percent of oxygen is calculated as:
\[ \left( \frac{64.00}{98.00} \right) \times 100\% = 65.3061\% \]

\(\boxed{3.086\%, 31.60\%, 65.31\%}\)

The mass percentages of the elements in \( \mathrm{H}_{3} \mathrm{PO}_{4} \) are:
\(\boxed{3.086\%, 31.60\%, 65.31\%}\)