Answer to Question #157525 in General Chemistry for Meg k

Question

P + H2O = H3PO3 + PH3 number of atoms n coefficients

Answer 1

Assuming that the question requires the number of atoms of each substance involved.

First, we balance the equation as thus;

2P + 3H₂O → H₃PO₃ + PH₃

Number of P atoms = 2moles x Avogadro number

= 3 mol x 6.02214086 × 10²³ mol^-1

= 1.8066 x 10²⁴ atoms

Number of atoms of H = 12 mol x 6.02214086 × 10²³ mol^-1

= 7.829 x 10²⁴ atoms

Number atoms of O = 4 x 6.02214086 × 10²³ mol^-1

= 2.4089 x 10²³ atoms