Topic 2 definitions

Question 1

How many particles in one mole

Answer 1

6.02x10^23

Question 2

Concentration formulae

Answer 2

Mol/dm^3
Mass/dm^3

Question 3

Limiting reagent

Answer 3

reactant that gets used up completely

Question 4

% yeild

Answer 4

experimental/theoretical x 100

Question 5

Unified atomic mass define

Answer 5

1/12 the mass of an atom of carbon-12

Question 6

Relative atomic mass define

Answer 6

Weighted average mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12

Question 7

Relative isotopic mass define

Answer 7

Mass of an atom of an isotope compared to 1/12 of the mass of an atom of carbon-12

Question 8

Relative molecular mass

Answer 8

Weighted average mass of one molecule of an element or compound compared with 1/12 of the mass of an atom of carbon-12

Question 9

Relative formula mass

Answer 9

The weighted average mass of one unit of a substance compared with 1/12 of the mass of an atom of carbon-12

Question 10

Define 1 mole

Answer 10

Amount of any substance that contains as many particles as there are carbon atoms in 12g of carbon-12

Question 11

Number of particles formula

Answer 11

Avogadro’s constant x mol=
number of particles

Question 12

Nitrate

Answer 12

Question 13

Zinc

Answer 13

Question 14

sulfate

Answer 14

Question 15

Hydroxide

Answer 15

Question 16

Ammonia

Answer 16

Question 17

Zinc

Answer 17

Question 19

Silver

Answer 19

Question 20

carbonate

Answer 20

Question 21

sulfate

Answer 21

Question 22

hydroxide

Answer 22

Question 23

ammonium ion

Answer 23

Question 24

bicarbonate

Answer 24

Question 25

Phosphate

Answer 25

Question 26

Empirical formula

Answer 26

simplest whole number ratio of the atoms in a molecule.

Question 27

Molecular formula

Answer 27

Actual number of each different atoms present in a molecule

Question 28

Anhydrous

Answer 28

No water of crystallisation

Question 29

Water of crystallisation

Answer 29

Specific number of moles of water associated with a crystal structure

Question 30

Hydrate compound

Answer 30

Compound which contains a definite number of moles of water in their structure

Question 31

Ideal gas law

Answer 31

PV=nRT P= Pressure V= Volume n= number of moles R= gas costant T= temperature

Question 32

what is the value of gas constant

Answer 32

= 8.314 J/mol K.

Question 33

K to celcius

Answer 33

K = C +273.15

Question 34

ethanoic acid formula

Answer 34

Question 35

Silica / silicon oxide

Answer 35

Question 37

Formula to find volume or concentration of a diluted solution

Answer 37

C1V1 = C2V2