Help with chemistry questions plz

Question

1-Calculate the mass in grams, in 2.28 mol of H2SO4.

2-Calculate the number of moles in 144 g of P.

3-Calculate the number of moles in 11.0 grams of NaOH

4-Calculate the moles of Iron (Fe) in 3.8 x 1021 atoms of Iron.

5-Calculate the number of moles in 2.60 grams of SnO2

Answer 1

1-Calculate the mass in grams, in 2.28 mol of H2SO4.

2.28 mol of H2SO4 x (98.079g / mol) = 223.62g H2SO4

2-Calculate the number of moles in 144 g of P.

144g P x (mol / 123.88g/) = 6.03 mol P

3-Calculate the number of moles in 11.0 grams of NaOH

11.0g NaOH x (mol / 39.99g) = 0.28 mol NaOH

4-Calculate the moles of Iron (Fe) in 3.8 x 1021 atoms of Iron.

3.8 x 10²¹ atoms Fe x (1 mole Fe/ 6.02 x 10²³ atoms Fe) = 0.0063 mol Fe

5-Calculate the number of moles in 2.60 grams of SnO2

2.60g SnO2 x (mol / 150.71g) = 0.017 mol SnO2