ICSE Class 10 Answered
Pls solve it.
Asked by prodyumna02 | 20 Mar, 2019, 04:15: PM
Expert Answer
We know that hydrocarbon contains only hydrogen and carbon.
(a) Therefore hydrocarbon X contains hydrogen and carbon.
(b) The copper oxide acts as an oxidising agent.
(c)
(i) No. of moles of CO2
The volume of CO2 = 224 ml
We know,
1 mole = 22400 ml
So 224 ml will be
Also,
(ii) 22400 ml contains 12 gm of carbon
That is 1 mole contains 12 g of C
So 0.01 mole will contain = 0.12 g of C
(iii) Mass of hydrogen = total mass of hydrocarbon − mass of carbon
mass of hydrocarbon = 0.145 g
Mass of hydrogen = 0.145 − 0.12
= 0.025 g
(iv) Mass of carbon = 0.12 gm
Mass of hydrogen = 0.025 g
Atomic mass of carbon = 12
Atomic mass of hydrogen = 1
Multiply 2.5 and 1 by 2 to get the simplest ratio,
So, the empirical formula is C2H5
Answered by Varsha | 20 Mar, 2019, 07:20: PM
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