Amount of Substance

Question 1

relative atomic mass

Answer 1

mean mass of atom of element divided by 1/12 mass of C12

Question 2

acogadro’s constant

Answer 2

6.022 x 10^23

Question 3

1 mol of C12 mass?

Answer 3

12 g

Question 4

moles formula

Answer 4

mass / Mr

Question 5

moles formula (conc)

Answer 5

conc * vol

mol/dm^3 * dm^3

Question 6

1dm3

Answer 6

1000cm3

Question 7

ideal gas equation

Answer 7

pV = nRT

p = pressure/Pa
V = vol/m3
n = no. of moles
R = 8.31
T = temp/K

Question 8

K to C

Answer 8

K = C + 273

Question 9

ideal gas trends under standard conditions

Answer 9

pressure is proportional to temp

volume is proportional to temp

pressure and volume are inversely proportional

Question 10

pV = nRT = ?

Answer 10

mRT / Mr

m = mass/g

Question 11

empirical formula

Answer 11

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

Question 12

molecular formula

Answer 12

actual number of atoms of each element in a compound

Question 13

Aluminium charge

Answer 13

3 +

metal

Question 14

Ag ion

Answer 14

Ag +

Question 15

Zn ion

Answer 15

Zn 2+

Question 16

hydrogen ion

Answer 16

H +

Question 17

ammonium ion

Answer 17

NH4 +

Question 18

hydroxide ion

Answer 18

OH -

Question 19

nitrate ion

Answer 19

NO3 -

Question 20

carbonate ion

Answer 20

CO3 2-

Question 21

sulfate ion

Answer 21

SO4 2-

Question 22

improving titration method

Answer 22

160 ms

Question 23

high atom economy benefits

Answer 23

less waste; less polluting

more efficient use of raw materials; more sustainable

less money on separating products

less money on treating or disposing waste

Question 24

titration steps

Answer 24

161 ms

Question 25

substance + oxygen

Answer 25

oxide

Question 26

metal + water

Answer 26

metal hydroxide + hydrogen

Question 27

metal + acid

Answer 27

salt + hydrogen

Question 28

oxide + acid

Answer 28

salt + water

Question 29

hydroxide + acid

Answer 29

salt + water

Question 30

carbonate + acid

Answer 30

salt + water + carbon dioxide

Question 31

hydrogen carbonate + acid

Answer 31

salt + water + carbon dioxide

Question 32

ammonia + acid

Answer 32

ammonium salt

Question 33

metal carbonate

Answer 33

metal oxide + carbon dioxide (on heating)