Amount of Substance (2.1.3) (A)

Question 1

How many mg are in a g?

Answer 1

1000mg

Question 2

How many g are in a kg?

Answer 2

1000g

Question 2

How many kg are in a tonne?

Answer 2

1000kg

Question 3

How many cm^3 are in a dm^3?

Answer 3

1000cm^3

Question 4

How many dm^3 are in a m^3?

Answer 4

1000m^3

Question 5

How many cm^3 are in a m^3?

Answer 5

1,000,000cm^3

Question 5

What is the amount of substance?

Answer 5

the quantity whose unit is the mole

Question 6

What is the mole?

Answer 6

The amount of substance containing as many particles as there are carbon atoms in 12g of carbon-12

Question 7

What is avogadro’s constant?

Answer 7

the number of particles per mole

Question 8

What is the formula to calculate the number of particles?

Answer 8

particles = moles x avogadro

Question 9

What are the other ways particles can be called?

Answer 9

molecules
atoms
ions

Question 10

If a question asks about the number of ions what do you do?

Answer 10

You need to find the ionic formulae of the substance and then calculate the number of ions

Question 11

What is the formula to calculate the number of moles using mass and Mr?

Answer 11

moles = mass / Mr

Question 12

What do you need to remember about when calculating the Mr?

Answer 12

To find the ionic formulae of any substances or to remember if a substance is diatomic

Question 13

What is the formula to calculate the density using mass and volume?

Answer 13

density = mass / volume

Question 14

What is the formula to calculate the number of moles using volume and Mr at RTP?

Answer 14

moles = volume / 24

Question 15

What is the ideal gas equation for when the reaction is NOT carried out at RTP?

Answer 15

PV = nRT

Question 16

What are the units that the various factors need to be in?

Answer 16

pressure in pascals
volume in m^3
n is moles of gas
r is 8.314
temperature is in kelvin

Question 17

How many pascals are in 1KPa

Answer 17

1000Pa

Question 18

How do you convert cm^3 to m^3

Answer 18

/ 1,000,000

Question 19

How do you convert dm^3 to m^3

Answer 19

/ 1000

Question 20

How do you convert a temperature from celsius to kelvin

Answer 20

+ 273

Question 21

How do you find moles using concentration and volume

Answer 21

moles = concentration x volume

Question 22

What unit is concentration’s answer in

Answer 22

mol dm-3

Question 23

How do you calculate the concentration in ‘conc in g dm-3’

Answer 23

conc in g dm-3 = conc in mol dm-3 x Mr