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(i) What property does Magnesium Oxide have that makes it useful to create heat-resistant bricks to line furnaces? (ii) Explain why H2S exists as a gas and H2O exists as a liquid (at r.t.p).

 (i)  Magnesium oxide is an ionic compound meaning the elements reside in a lattice held together by very strong electrostatic forces of attraction between their oppositely charged ions. Since bonds are b...

SN
Answered by Shahaab N. Chemistry tutor
16622 Views

How can we calculate product yield using reactants and reaction stoichiometry?

If we know the chemistry for a reaction we only need to know quantities from one of our reactants to calculate a product yield. For instance, in a reaction to make hydrogen peroxide, we can calculate the ...

JP
Answered by Joshua P. Chemistry tutor
2603 Views

Why don't Hydrocarbons and Water Molecules mix, and why might an emulsifier fix this?

Hydrocarbons are long chained, non-polar molecules of Carbon and Hydrogen. As the chain length increases the boiling point of oil increases and the intermolecular forces get stronger. At smaller chain len...

JP
Answered by Joshua P. Chemistry tutor
6587 Views

64% of an audience are female. Work out the ratio females : males Give your answer in its simplest form.

64% are female. This 64% out of 100%.

36% are male  

So the ratio is 64 : 36 or 32 : 18


Can then be simplified to 16 : 9

JQ
Answered by Jordan Q. Maths tutor
3298 Views

Why is globalisation a contentious term?

The notion of globalisation, or increasing interconnectivity, is, broadly speaking, the idea that the international order has become more interdependent in a range of areas pertaining to economic, social,...

RA
3801 Views

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