Calculate the mass of each sample.

a. 15.7 mol hno3

b. 1.04 * 10 - 3 mol h2o2

c. 72.1 mmol so2

d. 1.23 mol xenon difluoride

1 mole of any substance has Avagadro number of molecules and it's weight is equal to its molecular weight.

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Answer 1:

Molecular weight of HNO3 = 63.01 g/mol

Therefore, 1mole of HNO3 = 63.03 g

Hence, 15.7 mole of HNO3 = 63.03 X 15.7

= 989.57 g

Thus, mass of 15.7 mole of HNO3 = 989.57 g

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Answer 2:

Molecular weight of H2O2 = 34.01 g/mol

Therefore, 1mole of H2O2 = 34.01g

Hence, 0.00104 mole of H2O2 = 34.01 X 0.00104

= 0.03537 g

Thus, mass of 0.00104 mole of H2O2 is 0.03537 g

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Answer 3:

Molecular weight of SO2 = 64.07 g/mol

Therefore, 1mole of SO2 = 64.07 g

Hence, 72.1 mmole of SO2 = 64.07 X 0.0721

= 4.619 g

Thus, mass of 72.1 mm of SO2 is 4.619 g

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Answer 4:

Molecular weight of XeF2 = 169.29 g/mol

Therefore, 1mole of XeF2 = 169.29 g

Hence, 1.23 mole of XeF2 = 169.29 X 1.23

= 208.23 g

Thus, mass of 1.23 mole of XeF2 is 208.23 g