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Chemistry

GCSE

What is a mole?

A mole is a name given to a certain number of particles. Amounts of various substances are measured in a unit known as the mole (known as mol for short, symbol

Answered by Meenakkhi B. • Chemistry tutor

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How many moles of Magnesium must react with excess Oxygen to produce 80g of Magnesium oxide?

This question looks at the reaction:
Magnesium + Oxygen goes to Magnesium Oxide
Mg + O --> MgO
The first step is to calculate the moles of MgO produced using the mass in the question and...

Answered by Thomas C. • Chemistry tutor

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Explain what happens to magnesium and oxygen atoms when they react to form Magnesium oxide.

When this reaction occurs, strong ionic bonds form between two oppositely charged particles (ions).

Magnesium is a group II metal, and therefore has two electrons in it's highest energy ...

Answered by Mathew C. • Chemistry tutor

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A titration is carried out and 0.04dm^3 of sulphuric acid neutralises 0.08dm^3 sodium hydroxide of concentration 1mol/dm^3. Calculate the concentration of the sulphuric acid.

The first thing to do with this titration calculation is write the balanced symbol equation for the reaction. Using the knowlege that when an acid and base react a salt and water is produced we can wri...

Answered by Victor A. • Chemistry tutor

3774 Views

Why does copper make a good metal to use in electrical wiring?

Copper, like all metals, is a conducter of electricity. Copper is particularly effective because of the way its electrons are arranged allows for more free movement of electrons which allows for more e...

Answered by Matthew H. • Chemistry tutor

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