1
Q
Whats does stochiometry mean?
A
It means ‘‘to measure things’’
2
Q
What is the mass of a chemical compound?
A
The mass of the sum of all its constituents
3
Q
What is the mole?
A
A macroscopic quantity
4
Q
How many g is in a mole of carbon 12?
A
exactly 12g
5
Q
What is the formula to convert from n. of atoms to n. of moles?
A
n. atoms/6.022x10^(23) = n. of moles
6
Q
What is the number (6.022x10^(23)) called?
A
Avogadro’s number
7
Q
What is the symbol for atomic mass?
A
Unity (u)
8
Q
When do you convert (g) to (u)?
A
After calculating the mass of a chemical compound
9
Q
What is the formula unit of the compound ‘‘Sodium Chloride?
A
NaCl
10
Q
What is the molar mass?
A
Mass in grammes in 1 mole
Chemistry
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