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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

Answered by Katrina T. • Chemistry tutor

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Explain the difference in the speed of conduction of an action potential along the length of a myelinated neurone and a non-myelinated neurone.

First, we need to explain how the action potential is conducted along the length of the axon.

An action potential is transferred along an axon by the movement of Na^+...

Answered by Catherine H. • Biology tutor

7713 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 ...

Answered by Luke M. • History tutor

3143 Views

How do you write a coherent and skilled introduction?

Writing an excellent essay, whilst naturally requiring good and convincing prose, is actually quite the regimented science. A good essay 'formula' will consist of the same kind of points and argument s...

Answered by Luke M. • History tutor

5383 Views

Can you explain what stoichometry actually is and why the ratio is not the same as the number of moles?

Stoichiometry is just a way of relating two species that react, in a ratio. EXAMPLE: 1A + 2B -> 3C Now usually this would be written as A + 2B -> 3C but I've written the 1 to exaggerate the point. N...

Answered by Michael R. • Chemistry tutor

5282 Views