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Describe the structure, bonding and properties of diamond

Diamond has a giant covalent lattice structure. Each carbon atom forms a strong covalent bond with 4 other carbon atoms (forms 4 covalent bonds). As a result this makes diamond a hard structure.Diamond has a...
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Answered by Hannah O. • Chemistry tutor
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Max invests £2000 and gets 2.5% compound interest per year. Jade invests £1600 and gets 3.5% compound interest per year. Work out who will get the most interest by the end of 3 years.

To calculate the interest for Max we need to do 2000 multiplied by 1.025 3 To calculate the interest for Jade we need to do 1600 multiplied by 1.035 3 At the end of the three years, Max will have £2153.78 wh...
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Answered by Tutor405605 D. • Maths tutor
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How can chromatography be used to identify substances?

Chromatography can be used to determine the RF value of an unknown substance. This RF value when cross-referenced with already known RF values can then be used as a guide to find out a potential range of sub...
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Answered by Sam W. • Chemistry tutor
12450 Views

At a concert, the number of men, women and children can be expressed with the following ratio: 6:11:4 There were 6525 more women than men. How many children were at the concert?

We know there are 6525 more women than men. We can deduce that 5 'parts' = 6525 as 11-6=5If 5 parts = 6525. 1 part = 6525/5 = 1305.We know that 4 parts are children so, 1305 * 4 = 5220Alternatively, once you...
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Answered by Sandesh R. • Maths tutor
6057 Views

Solve the simultaneous equations 3x + y = 11 and 2x + y = 8.

First identify which unknown has the same coefficient. In this case it is y.Either add or subtract the two equations to eliminate y. In this case we subtract one equation from the other (can be either). 3x +...
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Answered by Natasha C. • Maths tutor
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