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Calculate the percentage composition by mass of NH,H,PO,​

Sagot :

Solution:

Step 1: Calculate the molar mass of NH₄H₂PO₄.

molar mass = (14.01 g/mol × 1) + (1.008 g/mol × 6) + (30.97 g/mol × 1) + (16.00 g/mol × 3)

molar mass = 115.028 g/mol

Step 2: Calculate the percentage composition of NH₄H₂PO₄.

General Formula:

[tex]\text{percent composition} = \frac{\text{atomic mass of an element × number of atoms in a compound}}{\text{molar mass of compound}} × 100[/tex]

For %N

[tex]\text{\%N} = \frac{\text{14.01 g/mol × 1}}{\text{115.028 g/mol}} × 100[/tex]

[tex]\boxed{\text{\%N = 12.18\%}}[/tex]

For %H

[tex]\text{\%H} = \frac{\text{1.008 g/mol × 6}}{\text{115.028 g/mol}} × 100[/tex]

[tex]\boxed{\text{\%H = 5.26\%}}[/tex]

For %P

[tex]\text{\%P} = \frac{\text{30.97 g/mol × 1}}{\text{115.028 g/mol}} × 100[/tex]

[tex]\boxed{\text{\%P = 26.92\%}}[/tex]

For %O

[tex]\text{\%O} = \frac{\text{16.00 g/mol × 4}}{\text{115.028 g/mol}} × 100[/tex]

[tex]\boxed{\text{\%O = 55.64\%}}[/tex]

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