Skip to content

Course home

Calculations involving masses

Calculations involving masses

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139
Question 50

When green copper(II) carbonate is heated, it undergoes thermal decomposition to form black copper(II) oxide and carbon dioxide gas:

CuCO3(s)→CuO(s)+CO2(g) \text{CuCO}_3(\text{s}) \rightarrow \text{CuO}(\text{s}) + \text{CO}_2(\text{g}) CuCO3​(s)→CuO(s)+CO2​(g)

In an experiment, a student heats 6.200 g of copper(II) carbonate. After the reaction is complete, the mass of the remaining solid copper(II) oxide is 3.980 g.

Calculate the mass of carbon dioxide gas that has been released into the atmosphere. Give your answer to three significant figures.

[2]
Markscheme

Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank