Quick questions on Formulae, Equations and Amounts of Substance (Topic 5) - Edexcel A-Level Chemistry

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

Show answer

Calculate the number of moles in

4.0\ \text{g}

of sodium hydroxide (

M_r = 40

). [1 mark]

What is q2?

Show answer

A compound contains

40\%

carbon,

6.7\%

hydrogen and

53.3\%

oxygen by mass. Determine its empirical formula. [3 marks]

Have a question we have not covered?

This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.

All ChemistryQ&A pages