Top answers

What is the reaction between Zinc and Sulphuric Acid?

When a metal reacts with an acid it forms a salt and hydrogen gas. The salt will be a sulphate due to the acid being H 2 SO 4 So, Zn + H 2 SO 4 --> ZnSO 4 + H 2
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Answered by Charles W. • Chemistry tutor
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What is an equilibrium?

Have you ever tried to run the wrong way down an escalator? then you have experienced a dynamic equilibrium.You are moving up, it is moving down and yet, your actual position isn't changing. In a reaction th...
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Answered by Jemma S. • Chemistry tutor
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Calculate the percentage composition by mass of Lithium Sulfate, Li2SO4.

(Taken from GCSE WJEC Additional Science Book- First Published in 2012) and I have adapted the answer given.Relative atomic masses: Li = 7 ; S= 32 ; O=161) Calculate molecular mass of lithium sulfate (Li2SO4...
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Answered by Elinor L. • Chemistry tutor
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What is the electronic configuration of Calcium?

Calcium has 20 electrons. The first ring can only contain up to 2 electrons.After that rings can only contain up to 8 electrons. Therefore the electronic configuration of Calcium would be: [2, 8, 8, 2]
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Answered by Jonny M. • Chemistry tutor
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Explain how crude oil is split into fractions? Give an example of a substance collected at the top of the column. [5 marks]

Crude oil is made up of a mixture of substances.Crude oil is vapourised before it enters the column.The column is hotter at the bottom and cooler at the top (around 350 degrees at the bottom, and 50 degrees ...
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