Question

find out the value of molecular weight of the given compounds:

(i) CH4 (ii)H2O (iii)CO2

Answer 1

Answer:

i) 16

ii) 18

iii) 44

#hope it help uh.!!!

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Answer 2

(i)CH4 :

Molecular weight of methane, CH4

 (1 x Atomic weight of carbon) + (4 x Atomic weight of hydrogen)

= [1(12.011 u) +4 (1.008u)]

= 12.011u + 4.032 u

= 16.043 u

 

(ii) H2O :

Molecular weight of water, H2O  

= (2 x Atomic weight of hydrogen) + (1 x Atomic weight of oxygen)

= [2(1.0084) + 1(16.00 u)]

= 2.016 u +16.00 u

= 18.016u

So approximately

= 18.02 u

 

(iii) CO2 :

= Molecular weight of carbon dioxide, CO2

= (1 x Atomic weight of carbon) + (2 x Atomic weight of oxygen)

= [1(12.011 u) + 2(16.00 u)]

= 12.011 u +32.00 u

= 44.011 u