Top answers

Why is Chlorine a gas at room temperature but Sodium Chloride is a solid?

Chlorine is a gas at room temperature due to its structure. Chlorine is made up of two chlorine atoms, held together by covalent bonds, forming simple covalent molecules. Whilst the covalent bonds within the...
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Answered by Sophie V. • Chemistry tutor
42776 Views

Give the advantages an disadvantages of building an airport to a nearby settlement.

The advantages are that it will supply a number of jobs for the local community. This will be because builders, plumbers, electricians etc will be needed for the building of the airport, and then staff will ...
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Answered by Nathan L. • Geography tutor
57903 Views

Each skin cell in a mouse has 40 chromosomes. How many chromosomes were present in each cell after dividing four times during cell culture?

When a cell divides, the number of chromosomes in that cell does not change. So if a cell had 40 chromosomes in it before it divided, it would still have 40 chromosomes in it after it had divided.
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Answered by Kelly J. • Biology tutor
14301 Views

What are indicator species and what are they used for?

Indicator species are organisms whos presence or absense may indicate something about the environement. For example, an increase in organisms that are not dependant on oxygen to survive (also known as anaero...
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Answered by Kelly J. • Biology tutor
5172 Views

When should I start revising for GCSEs and what is the best strategy for revision?

You should start you revision as soon as possible so that you have the time to put the different ideas, facts and names in order and form stable relationships between names and theories! You could even start...
DA
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