3. Moles

Question 1

What is the unified atomic mass unit? (1)

Answer 1

A unified atomic mass unit is one twelfth of the mass of a carbon-12 atom

Question 2

What is relative atomic mass Ar? (1)

Answer 2

The relative atomic mass is the ratio of the average mass of atoms of an element to the unified atomic mass unit

Question 3

What is an isotope? (1)

Answer 3

Isotopes are atoms that have the same number of protons but different numbers of neutrons

Question 4

What is the relative isotopic mass? (1)

Answer 4

The relative isotopic mass is the ratio of the mass of a particular isotope of an element to the unified atomic mass unit

Question 5

What is a molecule? (1)

Answer 5

Covalently bonded compounds

Question 6

What is a formula? (1)

Answer 6

Ionically bonded compound

Question 7

What is relative molecular mass, Mr? (1)

Answer 7

The relative molecular mass is the ratio of the weighted average mass of a molecule of a molecular compound to the unified atomic mass unit

Question 8

What is relative formula mass, Mr? (1)

Answer 8

The relative formula mass is the ratio of the formula unit of a compound to the unified atomic mass unit.

Question 9

Zinc charge?

Answer 9

Zn +2

Question 10

Silver charge?

Answer 10

Ag +

Question 11

Ammonium

Answer 11

NH4^+

Question 12

hydroxide

Answer 12

OH^-

Question 13

Nitrate

Answer 13

NO3^-

Question 14

Nitrite

Answer 14

NO2^-

Question 15

Sulfate

Answer 15

SO4^2-

Question 16

Sulfite

Answer 16

SO3^2-

Question 17

Carbonate

Answer 17

CO3^2-

Question 18

Hydrogen Carbonate

Answer 18

HCO3^-

Question 19

Bicarbonate

Answer 19

HCO3^-

Question 20

Phosphate

Answer 20

PO4^3-

Question 21

Chromate

Answer 21

CrO4^2-

Question 22

Dichromate

Answer 22

Cr2O7 ^2-

Question 23

Permangante

Answer 23

MnO4^-

Question 24

Cyanide

Answer 24

CN^-

Question 25

Hypochlorite

Answer 25

ClO ^-

Question 26

Chlorite

Answer 26

ClO2 ^-

Question 27

Chlorate

Answer 27

ClO3^-

Question 28

Perchlorate

Answer 28

ClO4^-