2C The mole

Question 1

Mole

Answer 1

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

Question 2

Avogadro’s constant

Answer 2

6.02 x 10^23

Question 3

Molar mass

Answer 3

The mass per mole of substance.

Question 4

Moles equation (Using Mr)

Answer 4

moles = mass ÷ Mr

Question 5

Mass equation

Answer 5

Mass = Moles x Mr

Question 6

Mr equation

Answer 6

Mr = Mass ÷ moles

Question 7

Empirical formula

Answer 7

The simplest whole number ratio of atoms of each element present in a compound

Question 8

Molecular formula

Answer 8

The actual number. ratio and type of atoms of each element present in a molecule.

Question 9

Water of crystallisation

Answer 9

Water molecules that are bonded into a crystaline structure of a compund

Question 10

Anhydrous

Answer 10

Salt without water

Question 11

Hydrated

Answer 11

Salt with water

Question 12

When reacting masses use:

Answer 12

Equation. Moles off known. Moles off unknown. Answer

Question 13

Solute

Answer 13

A solid which can dissolve in a solvent

Question 14

Solvent

Answer 14

A liquid which can dissolve a solute

Question 15

Solution

Answer 15

A solvent with a solute dissolved in it

Question 16

Concentration

Answer 16

The amount of solute, in moles, dissolved per 1 dm^3 of solution

Question 17

Standard solution

Answer 17

A solution of known concentration

Question 18

Concentration equation

Answer 18

Concentration = Moles ÷ Volume (dm^3)

Question 19

Moles equation (using concentration)

Answer 19

Moles = concentration x volume

Question 20

Volume equation

Answer 20

Volume = Moles ÷ concentration

Question 21

1 dm^3 in cm^3

Answer 21

1000cm^3

Question 22

Molar gas volume at rtp

Answer 22

24dm^3

Question 23

Moles equation (using gas volumes)

Answer 23

Volume of gas ÷ 24

Question 24

Volume of gas

Answer 24

Moles x 24

Question 25

what does a smaller volume to do pressure

Answer 25

increase in pressure

Question 26

what does a smaller temperature to do pressure

Answer 26

Decrease in pressure

Question 27

what does more moles of gas do to pressure

Answer 27

increase in pressure

Question 28

What is the ideal gas equation?

Answer 28

PV=nRT

Question 29

How many pascals in 1 atm

Answer 29

10^5 Pa

Question 30

How many pascals in 1 Kpa

Answer 30

10^3 Pa

Question 31

0ºC in kelvin

Answer 31

273ºk (celcius to kelvin = x + 273)

Question 32

0ºk in celcius

Answer 32

-273ºc (Kelvin to celcius = x -273)

Question 33

1m^3 in cm^3

Answer 33

10^6 cm^3

Question 34

1m^3 in dm^3

Answer 34

10^3 dm^3

Question 35

Percentage error

Answer 35

(Uncertainty ÷ value measure) x 100