Question

calculate molecular mass of Methane, hydrogen gas, Oxygen gas and chlorine gas.

Answer 1

Hey friend, Harish here.
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Here is your answer
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i)   Molecular formula of Methane gas -- CH₄

     C 's Atomic mass  -  12 u.
   
     H's Atomic mass  - 1 u

     So, Molecular mass of CH₄ - 12 + ( 4×1) = 12 + 4 = 16.

ii)   Molecular formula for Hydrogen gas --- H₂

      H's Atomic mass - 1u 

      So, Molecular mass of  H₂ - 2.

iii)  Molecular formula  of Oxygen gas --- 0₂
  
      O's Atomic  mass - 16 u

     So, Molecular Mass of O₂  - 2 x 16 = 32 u

iv)  Molecular formula of Chlorine gas is  - Cl

      It's Molecular mass is  -- 35.5 u.
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Hope my answer is helpful to u.

Answer 2

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here is your answer dear!!!!!!

1)molecular formula of methane is CH4

so atomic mass of carbon=12u

and atomic mass of hydrogen is 1u

molecular mass of ch4=

$12 + 4 \times 1$

$16u$

2)molecular formula of hydrogen is H2

atomic mass of hydrogen is 1

$1 \times 2$

$2$

3)molecular formula of oxygen is O2

atomic mass of oxygen is 16u

o2=

$2 \times 16$

$32$

4)molecular formation of chlorine is cl

so, it's molecular mass

$35.5u$

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