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# 4.4 Moles,Mass and Numbers homework 2

```Grade 12C:
Calculations Worksheet
Name: ___________
1.
Date:______________
What is the molar mass of an element if 8.9 moles has a mass of 61.77 g?
2. What is the mass of 2.3 moles of copper?
3. How many moles are in 10 g of nickel?
4. How many atoms are in 4.6 moles of carbon?
5. How many molecules are in 0.8 moles of carbon monoxide?
6. If you have 5.6 x 1024 atoms of Aluminium, how many moles do you have?
7. Calculate the mass of 6.7 moles of Copper.
8. Calculate the mass of 0.54 moles of Magnesium.
9. Calculate the number of atoms in 4.3 g of boron.
10. Calculate the number of molecules in 7.8 g of sodium carbonate.
11. If 3.4 g of an unknown element contains 1.86 x 1023 atoms, determine the identity of the
element.
12. For each row of values, calculate the missing information and insert it into the appropriate
spaces. Attach your rough work to this assignment.
Element
Molar Mass
1
2
40.08 g/mol
3
14.00 g/mol
4
4.00 g/mol
5
563.25 g/mol
Moles
Mass
6.32 mol
302.6 g
# of atoms or
molecules
5.3 mol
8.63 g
5.3 x 1024
59.3 g
```