Question

Calculate the molar mass of the following:

1.) H2O
2.) CO2
3.) CH4

And

Calculate the mass percent of different elements present in sodium sulphate (Na2SO4)?


#ANIKET ⭐ ✔

Answer 1

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1.) Molecular (molar) mass of H2O

=> 2(1.008)+16u

=>18.016u



2.) Molecular (molar) mass of CO2 :

=> 12.01u+2(16u)

=> 44.01 u


3.) Molecular ( molar) mass of CH4:

=>12.01u+4(1.008)u

=> 16.042u


And

For 2nd question Check out the above attachment I hope it will help you^_^


THANKS ✌☺

#HARYANVI THINKER ✔❤

Answer 2

HeLlO fRiEnD !! ⭐⭐⭐

your answer ...

1. H2O = 2 + 16 = 18 u

2. CO2 = 12 + 32 = 44 u

3. CH4 = 12 + 4 = 16 u

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Molar mass of sodium sulphate is = (2 × 23) + (32) + 4 (16)

= 142 g

Mass percent = Mass of that element in the compound / Molar mass of compound x 100

Mass percent of sodium = 46\142 x100 = 32.4%

Mass percent of sulphur

= 32/142x100

=22.6%

Mass percent of oxygen

= 64/142x100

= 45%

HOPE THIS HELPS YOU !! ❤️❤️❤️