Question

calculate the molar mass of ch4 , Co2 and H20 by formula ​

Answer 1

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Formula :-

अणुभार = तत्त्वों के परमाणु द्रव्यमानों का

योग

CH4 का अणुभार = 12 + 4(1)

= 12 + 4

= 16 g/mol

CO2 का अणुभार = 12 + 2(16)

=‌ 12 + 32

= 44 g/mol

H2O का अणुभार = 2(1) + 16

= 2 + 16

= 18 g/mol

Answer 2

Answer:

hey gd morning ❤

i) CH4

The molecular mass of methane, CH4

= (1 × Atomic mass of carbon) + (4 × Atomic mass of hydrogen)

= [1(12.01) + 4 (1.0079 )]

= 12.01 + 4.032

= 16.04 amu

ii) CO2

The molecular mass of carbon dioxide, CO2

= (1 × Atomic mass of carbon) + (2 × Atomic mass of oxygen)

Use Appendix II of NCERT book at page 232

= [1(12.01 ) + 2 (16.00 )]

= 12.01 + 32.00

= 44.01 amu

iii) H2O

The molecular mass of water, H2O

= (2 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen)

Use Appendix II of NCERT book at page 232

= [2(1.0079) + 1(16.00)]

= 2.016 + 16.00

= 18.016

Approximate the value

= 18.02 amu

(hope u like it ❣)