Ammonium sulfate, (NH4)2SO4, is used in fertilizers

Ammonium sulfate, (NH4)2SO4, is used in fertilizers

 

 

Ammonium sulfate, (NH4)2SO4, is used in fertilizers to provide nitrogen for the soil.

a. How many formula units are in 0.250 mole of ammonium sulfate?

b. How many H atoms are in 0.150 mole of ammonium sulfate?

c. How many moles of ammonium sulfate contain 6.2×10^25 atoms of N?

d. What is the molar mass of ammonium sulfate?

 

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a.

0.250 mol × (6.022×10^23 formula units / 1 mol)

= 1.51×10^23 formula units

 

 

b.

0.150 mol (NH4)2SO4 × (8 mol H / 1 mol (NH4)2SO4) × (6.022×10^23 atoms / 1 mol)

= 7.23×10^23 H atoms

 

 

c.

6.2×10^25 N atoms × (1 mol / 6.022×10^23 atoms) × (1 mol (NH4)2SO4 / 2 mol N)

= 51.5 mol (NH4)2SO4

 

 

d.

(NH4)2SO4의 몰질량 = 132.14 g/mol