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What observations would I expect to make if I dropped from magnesium into some hydrochloric acid? What is the balanced chemical equation?

Effervescence and the magnesium metal would dissolve. Mg + 2HCl --> MgCl2 + H2
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Answered by Ollie W. • Chemistry tutor
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What are the major similarities between oxidative phosphorylation and non-cyclic photophosphorylation?

In terms of similarities, both processes involve generating a proton electrochemical gradient across a membrane, by pumping protons from an area of lower concentration to a higher concentration. This creates...
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Answered by Ollie W. • Biology tutor
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How do I sketch a polynomial function?

Before you start it is best to gather as much information as you can about the function. The most important things to find are any roots - as these will tell where the graph should cross the axis - and the t...
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Answered by Julu L. • Maths tutor
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A car of mass 800 kg is accelerated horizontally by constant net force of 1920 N for 9 s. It then breaks for 2 s, but drives off a 5 m high cliff. If μ = 0.85, what is the total horizontal distance travelled by car and its velocity? Ignore air resistance.

F=ma, so a=F/m giving a=2.4m/s^2. When t=9s, v=at, so v=21.6m/s. Friction force is Ff = μF(normal), which is Ff = μmg, so Ff = 6670.8N (if g = 9.81m/s^2). Frictional force always acts against the direction o...
MK
Answered by Martin K. • Physics tutor
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Why did the Red Army win the Russian Civil War?

The Red Army won due to a mixture of their strengths and the Whites' incompetence. Trotsky was a great leader and had an effective military strategy - by contrast, the Whites were disorganised and had poor e...
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Answered by Catherine W. • History tutor
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