Chapter 2- Amount of substance

Question 1

What equation links mass, moles and Mr

Answer 1

Mass= Mr*mol

Question 2

What equation links concentration volume and moles

Answer 2

Concentration= mol/volume

Question 3

What units are volume measured in?

Answer 3

dm^3

Question 4

What units are concentration measured in?

Answer 4

mol dm^-3

Question 5

State the Ideal gas equation.

Answer 5

Vp=nrt
VolumePressure=molesIdeal gas constant*Temperature

Question 6

State the ideal gas constant.

Answer 6

8.314

Question 7

State the units of the ideal gas equation.

Answer 7

Volume=m^3
Pressure=Pa
Moles-mol
Temperature=K

Question 8

How to find number of atoms

Answer 8

moles x 6.022x10^23

Question 9

What is Empirical Formula

Answer 9

the simplest whole number ratio of atoms of an element in a compound

Question 10

What do ionic equations show

Answer 10

the reacting ions in a chemical reaction

Question 11

How do you calculate Percentage Yield?

Answer 11

Actual Yield/theoretical Yield x100

Question 12

What is atom economy

Answer 12

molecular mass of desired product ×100 /sum of molecular masses of all products