The simplest whole number formula of a compound is:
molecular formula
empirical formula
atomic formula
chemical formula
The mass of one hydrogen atom is:
1. 6 ×-10-31
1.7 × 10-24
6. 1 × 1023
2.1 × 10-28
The standard atom chosen to compare the mass of all other atom.
Fluorine
Hydrogen
Carbon
Oxygen
The amount of substance produced in an electrolytic reaction depends firstly on:
Cathode
Anode
Temperature
Quantity of electricity
The unit used to measure amount of elements and compounds.
Gram
Mole
Kilogram
Electron volt
The molecular formula of phosphorous oxide.
PO5
P2O6
P4O10
P3O4
The relative atomic mass of water is:
2
58.5
18
Hydrated copper sulphate crystal is:
CaSO4 .H2O
CaSO4. 4H2O
CuSO4.5H2O
CuSO4
Avogadro constant is:
6.02 × 1023
6.02 × 1028
7.1 × 10-31
6.02
The average mass of the naturally occurring atoms of the element, using a scale where an atom of carbon-12 has a mass of exactly 12.
Atomic mass
Molecular mass
Gram atomic mass
Relative atomic mass
