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Firstly, we want to make both measurements in grams. This means that we need to change 4kg (kilograms) to grams. Kilo means 1000, therefore there must be 1000 grams ( kilo gram) in 1kg. If we have 4kg, th...

Le Chatelier's principle states that if a system is disturbed - something changes - the system will tend to move in the direction that minimises the change.  3 marks from: The forw...

Potassium (K) is in group 1 of the periodic table, therefore it has 1 electron in it's outer shell. Sulfur is in group 6 so it has 6 electrons in it's outer shell. Ionic bonds occur when electrons are tra...

It can be difficult to make sure that you are answering the question that has been asked of you under the stress of exam conditions. To overcome this I would recommend that you first make a checklist at t...

The function is defined parametrically so we usually approach these questions using chain rule.Recall that: dy/dθ * dθ/dx = dy/dx So we will need to differentiate each expression individually then multipl...