How should I approach answering moles calculation questions?

The key to answering any moles calculation question in chemistry is working out which equation you need to use. Generally, if moles are involved it will be moles = volume x concentration or moles = mass/RFM. You should look at what measurements are mentioned in the question information and determine which of these equations should be used. Then, rearrange the equation with the two parameters you have been given so that you can calculate the unknown. Finally, you should make sure you have used the correct units and that you have considered the mole ratio between the two sides of the equation . Using the mole ratio allows you to calculate values for any of the compounds in an equation if you can work out the moles of just one of the compounds.

JS
Answered by Jonathan S. Chemistry tutor

1754 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Explain why sodium is more reactive than Lithium? (4 marks)


Name the type of reaction that takes place when calcium carbonate is heated strongly?


A compound is found to contain 37.21% carbon, 7.75% hydrogen and 55.04% chlorine. What is it's empirical formula?


describe in terms of electrons what happens when magnesium oxide is formed from magnesium and oxygen atoms?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences