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Describe a simple way to distinguish between aqueous solutions of potassium nitrate (KNO3) and potassium sulfate (K2SO4) using one test tube reaction

Add one of the following: barium chloride, barium hydroxide, barium nitrateObservation with potassium nitrate: colourless solution/ or no visible change or reaction) Observation with potassium sulfate: white...
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Answered by Rebecca S. • Chemistry tutor
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How do you use the 'pluscuamperfecto' and how is it formed?

The ' pluscuamperfecto ' is equivalent to the pluperfect in English, here's an example:Ya había comido la cena cuando Juán me llamó. I had already eaten dinner when Juan rang me.So we can see that the pluscu...
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Answered by Thomas C. • Spanish tutor
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What makes the structure of Haemoglobin good for the transport of oxygen to tissues? (3 marks)

Haemoglobin (Hb) is comprised of 4 polypeptide chains (2 alpha, 2 beta). Each polypeptide chain has a prosthetic group capable of picking up oxygen, therefore one Hb molecule can transport 4 oxygen molecules...
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A curve has the equation y=7-2x^5, find dy/dx of this curve

When you differentiate with respect to x, dy/dx, you multiply the number in front of the x by the power of the x then you take one away from the power.So for this example, the 2x 5 differentiates to:(2x5)x (...
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Answered by Emily C. • Maths tutor
5273 Views

Jim doesn't like his teenage brother Ted, so decides to push him down the stairs to give him a few bruises. Ted sees Jim before the push. Ted hits the floor hard at the bottom and dies. Discuss Jim's liability for any homicide offences.

Firstly, discuss Jim's liability for murder . There are two parts to this: actus reus (guilty acts) and mens rea (guilty mind). You could argue that the actus reus has been satisfied because Jim has caused t...
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Answered by Claire H. • Law tutor
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