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Work out the value of 4a + 2b when a = 4 and b = 3.

first substitute all the values you know into the formula (use brackets to make your work clear)

4(4) + 2(3)

we know that 2 numbers next to eachother means multiply so expan...

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Answered by Tom F. Maths tutor
10453 Views

Why is the Haber Process run at 450 °C instead of room temperature?

the forward reaction of the harbour process is exothermic, it gives out heat. so increasing temperature  will shift the equilibrium and decrease the yeild, however inc...

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Answered by Tom F. Chemistry tutor
11963 Views

What is empirical formula and how is it worked out?

Empirical formula is  the simplest ratio of elements in a formula. chemists use it to make big molecules easier to work with when doing calculations.

An example of a working out an empiri...

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Answered by Tom F. Chemistry tutor
3034 Views

What is the significance of Eva Smith's name in 'An Inspector Calls'?

As is often the case in tackling English questions, there is no right or wrong answer, the key is in choosing a few strong ideas which you can support with evidence from the text and which you can communi...

EH
44962 Views

What are the main themes in King Lear?

King Lear is one of those plays which Shakespeare uses to tackle a wide variety of themes, all of which can be analysed deeply individually, but also in terms of their interconnected nature. Some of the m...

EH
8582 Views

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