The Mole Flashcards
1
Q
The ____ is the SI (system international) unit for the amount of substance
A
Mole
2
Q
Avogadro’s number is:
A
6.02 x 10^23
3
Q
To calculate the molar mass of a compound ____ together the atomic molar masses of all the atoms in a compound
A
Add
4
Q
The formula to calculate molar mass is:
A
n = m/M
5
Q
What do the variables stand for:
n = m/M
A
n means number of moles (“mol” or molecules or particles)
m means mass (g)
M means molar mass (g/mol)
6
Q
What is the molar mass of:
Sodium chloride
A
58.44g/mole
7
Q
How many moles are in:
2.5g of sodium chloride
A
0.043 moles
8
Q
How many grams are in:
4.2 moles of gallium acetate
A
1036.854g —> 1036.85g
9
Q
How many molecules are there in 24 grams of FeF,3?
A
1.28 x 10^23 particles/molecules
10
Q
How many grams are there in 7.4 x 10^23 molecules of AgNO,3?
A
208.82g
