Answer:
0.027×10²³ atoms of H
Explanation:
Given data:
Mass of phosphoric acid = 0.1488 g
Number of hydrogen atoms = ?
Solution:
First of all we will calculate the number of moles of H₃PO₄.
Number of moles = mass/molar mass
Number of moles = 0.1488 g/ 98 g/mol
Number of moles = 0.0015 mol
1 mole of H₃PO₄ contain = 3 mol of H
0.0015 mol× 3= 0.0045 mol
Now we will calculate the number H atoms.
1 mole = 6.022×10²³ atoms
0.0045 mol×6.022×10²³ atoms / 1 mol
0.027×10²³ atoms of H
