2.1.3 Amount of Substance

Question 1

Unit conversions
1. g -> mg
2. kg-> g
3. t -> kg

Answer 1

1. x1000
2. x1000
3. x1000

Question 2

Volume conversions
1. m^3 -> dm^3
2. dm^3 -> cm^3
3.cm^3 -> m^3

Answer 2

1. x1000
2. x1000
3. /1,000,000

Question 3

What is amount of substance?

Answer 3

The quantity whose unit is the mole.

Question 4

What is a mole?

Answer 4

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

Question 5

What is the equation for avogadro’s constant?

Answer 5

moles = No. particles/ avogradro constant

Question 6

What is molar mass?

Answer 6

The mass of 1 mole of any substance in gmol^-1

Question 7

What is the equation with mole with masses?

Answer 7

moles = mass / Mr,Are you

Question 8

What is the equation for density?

Answer 8

density = mass/volume

Question 9

What is the equation for molar gas volumes at rep (room temperature) ?

Answer 9

moles - volume (dm^3) / 24

Question 10

What is the equation for molar gas volumes when NOT at RTP (room temperature) ?

Answer 10

pressure (pa) x volume (m^3) = No. moles x gas constant (8.314) x temperature (K, +273)

PV=nRT

Question 11

What are the unit conversions for molecular gas volumes when NOT at RTP?

kPa
dm^3
cm^3
°C

Answer 11

x1000 Pa
/1000 m^3
/1,000,000 m^3
+273. K

Question 12

What is the equation that includes concentration, moles and volume?

Answer 12

concentration (moldm^3) = moles / volume