Helppp PLZ urgenttt

Question

convert

1. 1.29 x 10^24 atoms of HF to grams

2. 3.14g of H2O to molecules

3. 2.79g NH3 to atoms

4. 4.90 mol Al2O3 to grams. To atoms

5. 3.56g of Cu to atoms

6. Mass of a sample of NO2 with 1.54 x 10^24 atoms.

7. How many molecules in a sample of NaClO with a mass of 3.90g.

8. 2.4g of CO2 would have how many Oxygen atoms.

9.63 x 10^22 molecules of CH3COONa to gram.

10. 3.6g AlPO4 to moles

11. 2.4g Na2SO4 to molecules

12. 5.50 x 10^22 atoms CaSO4 to grams

13. 6.8g (NH4)3PO4 to moles

Answer 1

1- 1.29 x 10^24 atoms HF X 1 mol HF / 6.022 x 10^23 atoms HF X 20 g HF / 1 mol HF

2- 3.14 g H2O X 1 mol H2O / 18 g H2O X 6.022 x 10^23 molecules H2O / 1 mol H2O