Search our library of homework questions

Top answers

All subjects

All levels

Explain how electricity is conducted through a metal. To gain full marks your answer must include a description of the structure and bonding in a metal.

Metals can be described as a lattice of close-packed positive ions in a sea of delocalised electrons. Because the electrons are delocalised, they can move freely through the metal.

Answered by Andrew B. • Chemistry tutor

13780 Views

Identify the dehydration product or products of a) ethanol, b) button-2-ol

Dehydration is a process in which an alcohol loses a molecule of water and leaves behind an alkene. The OH group is removed along with an H from any adjacent carbon atom. To work out the answer, firstl...

Answered by Andrew B. • Chemistry tutor

4489 Views

There are n sweets in a bag, 6 are orange, the rest yellow. Two sweets are taken out individually without replacement. The probability of which is 1/3. show n²-n-90=0

Firstly, you need to consider the type of problem we are dealing with. This is actually just a tree diagram type question. note that the sweets are not replaced.

Letting n = number of swe...

Answered by Joel R. • Maths tutor

3933 Views

There are n sweets in a bag. Six of the sweets are orange, the rest are yellow. One sweet is removed from the bag without replacement, then another is removed without replacement. Show that n²-n-90=0

Firstly, you need to consider the type of problem we are dealing with. This is actually just a tree diagram type question. note that the sweets are not replaced.

Letting n = number of swe...

Answered by Joel R. • Maths tutor

4479 Views

Explain two benefits to the government that falling unemployment provides.

There will be less unemployment benefits paid out by the government allowing them to spend this money elsewhere, such as improving infrastructure.
2. Less people unemployed means the government...

Answered by George B. • Economics tutor

21780 Views