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What is the test for CO2 gas? Describe the overall reaction that takes place in the instance of a positive result and write its reaction equation.

The gas is passed through a container of Lime-water, if the Lime-water goes cloudy it means that the gas is CO2. The Carbon dioxide reacts with Calcium hydroxide to produce a Calcium carbonate precipitate an...
AO
Answered by Aarran O. • Chemistry tutor
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A ball is released from stationary at a great height. Explain how the forces acting on it change before it hits the ground and how these forces affect the velocity of the ball.

The initial velocity of the ball is 0, and so the only relevant force acting on it is weight pulling it downwards, so, the ball accelerates towards the ground. As the ball falls it hits air particles which c...
EC
Answered by Em C. • Physics tutor
9169 Views

Solve (x/4)-(2x/x+2)=1. Give your solutions to 2 decimal places.

Re-arrange to x^2-10x-8=0Using quadratic formula obtains two values, x=10.74 and x= -0.74
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Answered by Will H. • Maths tutor
3414 Views

How does Keats portray nature in 'Autumn'?

From the title we know that nature is going to play a dominant role in Keats' poem Autumn - not only is it the title but Autumn itself becomes a female character when Keats' personifies and apostrophises the...
ZL
24875 Views

How do I cut down my personal statement?

Character count for a personal statement quickly becomes a problem, so its important to impart what you need to efficiently. To start with consider the course you are applying to, what it is they would want ...
CB
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