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# molar ratios etc. need some answers checking. Watch

1. I would just like someone to check my answers for me. Im not sure my molar ratios are right. I'm going off of the info found here

http://www.ehow.com/how_8149226_calc...lar-ratio.html

The only thing im missing is the molar ratio for Potassium + Iron (II) Sulphate. Any help on that is welcome.

Write properly balanced equations for the following reactions. State the molar ratios of the reactions.

Sodium Hydroxide + Phosphoric Acid
3NaOH + H3PO4 → Na3PO4+3H2O
Molar ratio =3:1

Methane + Oxygen
CH4 + 2O2 → CO2 + 2H2O
Molar ratio = 2:1

Zinc + Sulphuric Acid
Zn + H2SO4 → ZnSO4 + H2
Molar ratio= 1:1

Ammonia + Hydrochloric Acid
NH3 + HCl → NH4Cl + H2O
Molar ratio = 3:1

Sodium bicarbonate + Phosphoric Acid
H3PO4 + 3NaHCO3 → Na3PO4 + 3CO2 + 3H2O
Molar ratio = 3:1

Potassium + Iron (II) Sulphate
MnO4- + 8H+ + 5Fe+2 → Mn+2 + 5Fe+3 + 4H2O
Molar ratio = ???

Iron + Hydrochloric Acid
Fe + 2HCl → FeCl2 + H2
Molar ratio = 2:1

Nitric Acid + Magnesium Hydroxide
2HNO3 + Mg(OH)2 → Mg(NO3)2 + 2H2O
Molar ratio = 1.5:1

Calculate the molecular weights of the following compounds
CuNO3 = 125.551 g/mol
KOH = 56.105 g/mol
Fe = 55.845 g/mol
H3PO4 = 97.995 g/mol
CO2 = 44.009 g/mol
CH4 = 16.042 g/mol
Na2SO4 = 142.042 g/mol
LiOH = 23.948 g/mol
Ca3(PO4)2 = 310.176 g/mol

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