Skip to content

Course home

Question bank·7.1 Carbon compounds as fuels and feedstock
Sign up

7.1 Carbon compounds as fuels and feedstock

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435
Question 21

A teacher asks a student to build a model of one molecule of an alkane. The model must contain 29 atoms in total.

The student proposes that the model should have the molecular formula C10H19\text{C}_{10}\text{H}_{19}C10​H19​.

The numbers of carbon and hydrogen atoms in an alkane are related by the general formula CnH2n+2\text{C}_n\text{H}_{2n+2}Cn​H2n+2​.

a.

Evaluate the student's proposed molecular formula.

[3]
b.

Calculate the molecular formula of the alkane whose model would contain 29 atoms in total.

[2]
Markscheme

7.1 Carbon compounds as fuels and feedstock Questions

  1. GCSE
  2. /Chemistry
  3. /7.1 Carbon compounds as fuels and feedstock

91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.

More questions