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What is global dimming and why does it occur?

Global dimming occurs due to light being reflected off the Earth's atmosphere and back into space.Light is reflected off the Earth's atmosphere due to the build up of Soot (C).Soot (C) is a product of incomp...
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Answered by Fazna R. • Chemistry tutor
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Explain why graphite conducts electricity in terms of structure and bonding.

Graphite has a giant covalent structure where each carbon atom is covalently bonded to three other carbon atoms. Each carbon atom also has one delocalised electron which can flow freely through the structure...
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Answered by Jess B. • Chemistry tutor
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If 350gNaCl is dissolved in water and made up to a volume of 3dm^3, calculate the concentration of the solution.

Moles= Mass/Mr Mol (NaCl)= 35/(23+35.5)=350/58.5=0.6Concentration= Moles/volumeConc(NaCl)= 0.6/3=0.2mol/dm 3
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Answered by Lucy P. • Chemistry tutor
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How do I work out the formula of ionic and covalent compounds?

First, ionic compounds form bonds by transferring electrons from their outer shell. Covalent compounds form bonds by sharing electrons within their outer shell. The number of electrons in the outer shell of ...
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A compound is found to contain 37.21% carbon, 7.75% hydrogen and 55.04% chlorine. What is it's empirical formula?

Carbon: 37.21/12= 3.1Hydrogen:7.75/1=7.75Chlorine: 55.04/35.5=1.55Ratio:c:H:Cl3.1:7.75:1.552:5:1Therefore empirical formula= C 2 H 5 Cl
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Answered by Lucy P. • Chemistry tutor
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