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Describe the structure and bonding of sodium chloride.

Sodium chloride has a giant ionic lattice structure with ionic bonding. There are electrostatic forces of attraction between the Na + ions and the Cl - ions.
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Answered by Amy S. • Chemistry tutor
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What is a surd? How would you go by simplifying a surd?

A surd is an irrational square root which cannot be reduced to a whole number when squared. When you think of the square root of 4, the answer is 2. When you think of the square root of 9, the answer is 3. H...
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Answered by James O. • Maths tutor
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Outline the process of eutrophication

Eutrophication occurs when nitrate fertilisers are carried by ground water into lakes and ponds. The fertliser encourages algal growth in the water, which in turn blocks out sunlight. This causes submerged p...
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Answered by India G. • Biology tutor
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Coal is a fossil fuel and in constant debates for its negative impacts on the environment. Which elements does it consist of and which products are being formed when it is burned? Give two examples for the effects on the environment.

(a) Coal contains Carbon (80%) Sulfur (9%) Oxygen (5%) Hydrogen (1%) other elements (5%) (b) Carbondioxide (CO2) Sulfurdioxide (SO2) Water (H2O) (c) Carbon dioxide: Global warming (green house effect) Sulfur...
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Answered by Thea P. • Chemistry tutor
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Bill's Diner is an American burger restaurant. There is an increase in import costs of products needed from America, and change in perceptions of fast food such as burgers, due to an increase in health warnings. Discuss the effects on the market. (6)

A decrease in supply (1) A decrease in demand (1) A reduction in overall market quantity (1) An indeterminable effect on price (1) Effect will depend upon relative size of the shifts (1) and the price elasti...
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Answered by Daanial C. • Economics tutor
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