Write the names of the following
compounds and deduce their
molecular masses.
Na2SO4, K2CO3,, CO2,, MgCl2,, NaOH,
AIPO4, NaHCO3
Answers
i. Na2SO4 : Sodium Sulphate
Steps for finding the molecular mass:
Molecular mass of Na2SO4 = 2(Atomic mass of Na) + 1(Atomic mass of S) + 4(Atomic mass of O)
⇒ Molecular Mass = 2(23) + 1(32) + 4(16)
= 46 + 32 + 64
= 142 g/mol
ii.K2CO3: Potassium Carbonate
Steps for finding the molecular mass:
Molecular mass of K2CO3 = 2× (Atomic mass of K) + 1× (Atomic mass of C) + 3× (Atomic mass of O)
Molecular Mass = 2× (39) + 1× (12) + 3× (16)
= 78 + 12 + 48
= 138 g/mol
iii.CO2:- Carbondioxide
Molecular mass of CO2 = 1× (Atomic mass of C) + 2× (Atomic mass of O)
Molecular Mass = 1× (12) + 2× (16)
= 12 + 32
= 44 g/mol
iv.NaOH:Sodium Hydroxide
Molecular mass of NaOH = 1× (Atomic mass of Na) + 1× (Atomic mass of O) + 1× (Atomic mass of H)
Molecular Mass = 1× (23) + 1× (16) + 1× (1)
= 23 + 16 + 1
= 40 g/mol
v.MgCl2:Magnesium Chloride
Molecular mass of MgCl2 = 1× (Atomic mass of Mg) + 2× (Atomic mass of Cl)
Molecular Mass = 1× (24) + 2× (35.5)
= 24 + 70
= 94 g/mol
vi.AlPO4:-Aluminium Phosphate
Molecular mass of AlPO4 = 1× (Atomic mass of Al) + 1× (Atomic mass of P) + 4× (Atomic mass of O)
Molecular Mass = 1× (27) + 1× (31) + 4× (16)
= 27 + 31 + 64
= 122 g/mol
vii.NaHCO3: Sodium Bicarbonate
Molecular mass of NaHCO3 = 1× (Atomic mass of Na) + 1× (Atomic mass of H) + 1× (Atomic mass of C) + 3× (Atomic mass of O)
Molecular Mass = 1× (23) + 1× (1) + 1× (12) + 3× (16)
= 23 + 1 + 12 + 48
= 84 g/mol
Answer:
here is your answer dear:
i. Na2SO4 : Sodium Sulphate
Steps for finding the molecular mass:
Molecular mass of Na2SO4 = 2(Atomic mass of Na) + 1(Atomic mass of S) + 4(Atomic mass of O)
⇒ Molecular Mass = 2(23) + 1(32) + 4(16)
= 46 + 32 + 64
= 142 g/mol
ii.K2CO3: Potassium Carbonate
Steps for finding the molecular mass:
Molecular mass of K2CO3 = 2× (Atomic mass of K) + 1× (Atomic mass of C) + 3× (Atomic mass of O)
Molecular Mass = 2× (39) + 1× (12) + 3× (16)
= 78 + 12 + 48
= 138 g/mol
iii.CO2:- Carbondioxide
Molecular mass of CO2 = 1× (Atomic mass of C) + 2× (Atomic mass of O)
Molecular Mass = 1× (12) + 2× (16)
= 12 + 32
= 44 g/mol
v.MgCl2:Magnesium Chloride
Molecular mass of MgCl2 = 1× (Atomic mass of Mg) + 2× (Atomic mass of Cl)
Molecular Mass = 1× (24) + 2× (35.5)
= 24 + 70
= 94 g/mol
vi.AlPO4:-Aluminium Phosphate
Molecular mass of AlPO4 = 1× (Atomic mass of Al) + 1× (Atomic mass of P) + 4× (Atomic mass of O)
Molecular Mass = 1× (27) + 1× (31) + 4× (16)
= 27 + 31 + 64
= 122 g/mol
vii.NaHCO3: Sodium Bicarbonate
Molecular mass of NaHCO3 = 1× (Atomic mass of Na) + 1× (Atomic mass of H) + 1× (Atomic mass of C) + 3× (Atomic mass of O)
Molecular Mass = 1× (23) + 1× (1) + 1× (12) + 3× (16)
= 23 + 1 + 12 + 48
= 84 g/m