Chapter 3

Question 1

What does one mole contain

Answer 1

6.02*10^23 particles

Question 2

What is the molar mass?

Answer 2

Molar mass is the mass per mole of a substance

Question 3

How do you find out the number of moles?

Answer 3

N=m/M
N-number of moles
m-mass
M-molar mass

Question 4

What is the empirical formula?

Answer 4

Simplest whole number ratio of atoms of each element present in the compound

Question 5

What is the molecular formula?

Answer 5

The number and type of atoms of each element in a molecule

Question 6

What does anhydrous mean?

Answer 6

Substance that contains no water

Question 7

What does hydrated mean?

Answer 7

A crystalline compound contains water molecules

Question 8

What is the equation for the number of moles? (Volume)

Answer 8

n=c*v
n=number of moles
c=concentration
v=volume

Question 9

What is the gas equation?

Answer 9

n=V/vm 
n-number of moles
V-volume
vm-molar gas volume 
At RTP, vm is 24dm^-3

Question 10

What is the ideal gas equation?

Answer 10

pV=nRT
p-pressure (pa)
V-volume (m^3)
n-number of moles (mol)
R-ideal gas constant (8.31mol^K^-1)
T-temperature (K)

Question 11

What is stoichiometry?

Answer 11

Ratio of the amount in moles of each substance

Question 12

What is the percentage yield?

Answer 12

Actual yield/theoretical yield * 100

Question 13

What is atom economy?

Answer 13

Sum of molar masses of desired product/sum of molar masses of all products