# y'all got molzz

## 8 terms

### convert 1.806 x 10²³ molecules of Cl₂ to moles

1. put 1.806 x 10²³ molecules of Cl₂ over 1

2. then, put 1 mole over 6.02 x 10²³ molecules (molecules cross out and moles are left)

3. divide 1.806 x 10²³ molecules of Cl₂ by 6.02 x 10²³ molecules and you get 0.3000 moles (4 significant figures)

### convert 9.00 grams of H₂SO₄ to moles

1. put 9.00 grams over 1

2. find the molar mass of H₂SO₄ and put that under 1 mole (grams cancel out leaving you with moles)

3. divide 9.00 grams by the molar mass and get 0.0918 (4 significant figures)

### convert 4.50 moles of NaCl to mass in grams

1. put 4.50 moles of NaCl over 1

2. find the molar mass of NaCl and put that over 1 moles (moles cancel out and leave you with grams)

3. multiply 4.50 moles by the molar mass to get 263 grams

### convert 1.8 moles of PCl₃ to number of molecules

1. put 1.8 moles of PCl₃ over 1

2. put 6.02 x 10²³ molecules over 1 mole (moles cancel out leaving you with molecules)

3. multiply 1.8 by 6.02 x 10²³ to get 1.1 x 10²⁴

### find the number of atoms in 55g (C₁₂H₂₂O₁₁)

1. find molar mass of C₂H₂₂O₁₁

2. put 55g over 1

3. put 1 mole over the molar mass

4. put 6.02 x 10²³ molecules over 1 mole

5. put the number of atoms (45) over 1 molecule

### find the atoms of 42 liters of XeF₄ gas

1. 42 liters over 1

2. 1 mole over 22.4 liters

3. 6.02 x 10²³ molecules over 1 mole

4. 5 atoms over 1 molecule

### find the density of XeF₄

1. find molar mass

2. put molar mass in grams over 1 mole

3. put 1 mole over 22.4 L

### find the amount of iron in 25.0g of Fe₃O₄

1. find molar mass

2. put the mass of Fe₃ over molar mass

3. multiply by 100 grams

4. divide by 100 and multiply by number of grams (25) and get 18 g