Top answers

What conditions increase the likelihood of fossilisation?

Cold and low oxygen - minimises likelihood of organisms decaying
KT
Answered by Katrina T. • Biology tutor
4798 Views

2.4 g of magnesium reacts with 1.6 g of oxygen. What is the empirical formula of the oxide formed?

Ar of Magnesium = 24; Ar of Oxygen = 16 number of moles = mass divided by Ar number of moles of Mg = 2.4/24 = 0.1 number of moles of Oxgen = 1.6/16 = 0.1 ratio of Mg to O = 0.1:0.1 = 1:1 So oxide produced is...
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Answered by Katrina T. • Chemistry tutor
18643 Views

How do you analyse a source?

Analysing a source is a challenge, particularly when you'll probably be doing this analysing in the stressed environment you'll get in an exam. Though by using the same kind of formula to apply to any source...
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Answered by Luke M. • History tutor
4115 Views

How can you stop a cell culture from becoming contaminated?

Sterilising petri dishes and agar before use. Taping lid of petri dish whilst microbes are glowing. Sterilising innoculating loops before use.Carry out experiment near bunsen burner for updraft.
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Answered by Iona H. • Biology tutor
4227 Views

How do I select and memorise my quotes for the exam?

It can truly add pressure to a student when they have to remember quotes for their exam. How to go about selecting and revising them is also a struggle, however here are some step by step tips on how to do e...
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