Answer:
7.46 g
Explanation:
Equation for the reaction can be represented as:
[tex]3NH_3 +H_3PO_4 -----------> [{(NH_4)_3PO_4][/tex]
1 mole of phosphoric acid is equivalent to 1 mole of ammonium phosphate in the above reaction; and as such;
numbers of moles of phosphoric acid = numbers of moles of ammonium phosphate
Given that the mass of phosphoric acid = 4.9 g; we can determine the number of moles of phosphoric acid in the process.
[tex]number of moles = \frac{mass}{molarmass}[/tex]
mass = 4.9 g
molar mass = 98 g/mol
numbers of moles = [tex]\frac{4.9}{98}[/tex]
= 0.05 mole
Therefore, the mass of ammonium phosphate can be determine:
mass = number of moles × molar mass
mass of ammonium phosphate = 0.05 mole × 149.09 g/mol
mass of ammonium phosphate = 7.4545 g
mass of ammonium phosphate ≅ 7.46 g
