Search over 10,000 free study notes

We need to think about the number of atoms of each element in the reactants and ensure these are the same in the products.

This is the basic UNBALANCED equation.

C₄H₁₀ ...

To answer this we need to use the equation Q = MC(T1-T2)

We want to know what T2 is (ie the temperature after one hour).

So rearrange the equation to get T2 = T1 - Q/MC

No substitute ...

There are many different ways in which a semicolon can be used. 

The first, and the most common is to link two similar clauses together. For example, you could say, 'The lady had a cat. The cat was...

1. Start by writing the equation out again: x² + 5x + 6 = 0

2. I do it by thinking which two numbers add together to = 5 and which same two numbers multiply to = 6. The an...

i) (2sqrt(7))² = 2²  sqrt(7)² = 4 * 7 = 28      (1 mark) ii) First of all substitute the answer from above.    ((2 * sqrt(7))² + 8) / (3 + sqrt(7)) = (...