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Simplify sqrt(12)

12 = 4 3Therefore sqrt(12) = sqrt(4 3) The square root of the product of two numbers can the written as the product of the square roots of the numbersHence sqrt(4*3) = sqrt(4) * sqrt(3) sqrt(4) = 2 So sqrt(4...
HT
Answered by Hazel T. Maths tutor
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If we have 10 grams of Helium at a concentration of 10 mol dm-3, what volume of helium do we get.

First we need to identify that 2 equations will be in use here. 1st - moles = mass/Mr and 2nd - volume = moles/concentration This is because we need to find the volume and the only other information we have ...
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Answered by Hamaad H. Chemistry tutor
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How would you draw a Dot & Cross diagram for the ionic bonding of Potassium and Chlorine

The potassium has 1 electron on its outer shell.A chlorine atom has 7 electrons on its outer shell Potassium and Chlorine react to form Potassium Chloride The potassium and chloride ions will then have full ...
MS
Answered by Manas S. Chemistry tutor
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How do I approach an extract question?

Extract questions may seem challenging because they can require a detailed analysis of any section across an entire set text. However, despite this variability in content most of the time they can be tackled...
PK
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Solve these two equations simultaneously: 7x + y = 1 and 2x^2 - y = 3.

Equation 1: 2x 2 - y = 3 and Equation 2: 7x + y = 1. Rearrange equation 1 to make y the subject: 2x 2 - y = 3, 2x 2 - 3 = y. Substitute equation 1 into equation 2 to get equation 3: 7x + (2x 2 - 3) = 1, 7x +...
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Answered by Darcie D. Maths tutor
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