Chapter 9 - Review Flashcards
1
Q
1 mole of Carbon atoms weighs 12.0g and has how many atoms?
A
6.022*10^23
2
Q
1 mole of Oxygen gas has how many atoms?
A
12.04*10^23 [BECAUSE TWO]
3
Q
How many moles and atoms are in 10.0g of Al? Keeping in mind that the atomic mass of Al is 26.98g.
A
- 3706 mole
2. 231*10^23
4
Q
How mnay moles and grams are in 2.23*10^23 atoms of Al?
A
- 3705 mole
9. 996g
5
Q
Find the molar mass of water, knowing the that the atomic mass of Hydrogen is 1.008g and the atomic mass of Oxygen is 16.00g.
A
18.02g
6
Q
How many moles are in 5.5*10^25 atoms of S?
A
91.331 moles
7
Q
How to find the composition percentage of a chemical in a compound?
A
Percentage = [mass of chemical/mass of compound] x 100
