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Chemistry
GCSE

What is the difference between oxidation and reduction?

Oxidation and reduction are considered opposites in terms of electrons moving. Oxidation occurs when an electron is lost, while reduction occurs when an electron is gained. It is often seen with oxygen be...

Answered by Luke P. Chemistry tutor
1601 Views

How do I balance C4H8 + O2 --> CO2 + H2O?

When balancing a reaction, you first want to count how many particles there are of each element on each side.You then want to try and make both sides the same for each element. In this case we're going to...

Answered by Aiman K. Chemistry tutor
4851 Views

Calculate the number of moles of carbon dioxide molecules in 11 g of CO2.

Use equation: mole=mass/mr Calculate Mr of CO2 = 44Moles= 11g/44= 0.25 moles

Answered by Mujahid R. Chemistry tutor
3614 Views

Polyester is a common polymer used in clothing. State the name of the chemical reaction used to form polyester by reaction of ethanedioic acid and ethane-1,2-diol. Give the name of the molecule which is lost upon condensation of these two molecules.

Name of reaction is condensation polymerisation.Water is lost upon condensation of ethanedioic acid and ethane-1,2-diol (will draw this out on the whiteboard).

Answered by Melissa W. Chemistry tutor
2892 Views

Draw the electronic structure of Sodium Chloride and explain how an ionic bond affects the melting and boiling point.

Ionic bonds are very strong, with elements involved in a compound having a full outer shell of electrons due to donating and accepting electrons, allowing them to be in a very stable state. In this case, ...

Answered by Hans D. Chemistry tutor
4166 Views

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