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So relative formula mass (M_r) just means the total mass of all the atoms within our molecule. So lets work out how many of each atom we have: Ba - 1, C - 1, O - 3Now we know the relative atomi...

2x-5=3x+4 Firstly, you move the +4 to the other side (-5-4=-9). The equation should now look like: 2x-9=3x. You then move the 2x to the other side (3x-2x=x) so your answer would be x=-9

The strict time conditions of a GCSE history essay are one of the most taxing aspects of the exam. The examiners want to see that you can present a clear and concise argument with specific and relevant co...

This question is asking you to choose two main characters in the novel, and pick significant actions which demonstrate to the reader their personality and attitudes. The introduction should give some cont...

Firstly, we want to start off by calculating how many litres of diesel the lorry uses when it drives for 200 miles. We know that with 1 litre of diesel, the lorry can drive for 35 miles. Knowing this, we ...