Mole and reacting masses

Question 1

what is the formula and define each one for calculating Moles and when is it used for

Answer 1

N = (V x C) (divide) 1000

N - mole

V - volume

C - concentration

for solutions/liquids

Question 2

What is the Formula for Mass (Mr) and when is it used for

Answer 2

N = mass (g) (divide) relative molecular mass

or…

N = M (divide) Mr

for solids

Question 3

What is Mr for a compound for C(2)H(4)O(2) and AlCl(3)

Answer 3

1. (12x3) + (1x4) + (16x2) = 60

2. 27 + (35.5x3) = 133.5

Question 4

if water has a Mr of 18g mol (-1)

1. what does it mean
2. how many moles of water is 36g/9g/108g
3. what would be the mass of 3/0.1/0.25 mol

Answer 4

1. 19 grams per mol
2. 2/0.5/6 mol
3. 54/4.5/1.8 grams

Question 5

Define mole

Answer 5

an amount of substance by the number of atoms/molecules/ions/particles it has in it