The mole & gases

Question 1

How many particles is roughly in one mole?

Answer 1

6.02x10^23 (The Avogadros constant)

Question 2

What is the formula to work out how many particles there are?

Answer 2

Number of particles = Number of moles x avogadros constant

Question 3

What equation, using moles, can you use to find out the mass or the Mr of a substance?

Answer 3

Moles = mass of substance / Mr

Question 4

What is the formula for working out the number of moles using the concentration and volume?

Answer 4

Number of moles = concentration x volume

Question 5

What is the ideal gas equation?

Answer 5

pV = nRT

Question 6

What is the p in the ideal gas equation? What are the units?

Answer 6

Pressure

Pa

Question 7

What is the V in the ideal gas equation?

Answer 7

Volume

m3

Question 8

What is the n in the ideal gas equation?

Answer 8

number of moles

Question 9

What is the R in the ideal gas equation?

Answer 9

The gas constant

Question 10

What is the T in the ideal gas equation? What are the units?

Answer 10

Temperature

K

Question 11

How do you get from kPa to Pa?

Answer 11

Multiply by 1000

Question 12

How do you get from degrees celcius to kelvin?

Answer 12

Add 273

Question 13

How do you convert cm3 to m3?

Answer 13

Multiply by 10^-6

Question 14

How do you convert dm3 to m3?

Answer 14

Multiply by 10^-3