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"La piscine est située devant le club de jeunesse et derrière le phare". What directions have you been given?

La piscine is the subject and means "the pool" est is the verb and means to be, so in this phrase it means "is"devant and derrière are locations, they mean in front of and behind So the p...
SC
Answered by Sara C. • French tutor
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Simultaneous equation: (x-3y)=9,(2x+3y)=0

Using one of the equations we express either x in the form of y, or y in the form of x. We then put this expression of x/y into the other equation. This allows us to calculate the numerical values of both x ...
KT
Answered by Kerushan T. • Maths tutor
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Describe what happens to sodium and chlorine in a reaction to make Sodium cholride, you may use diagrams to help you.

As Sodium is a metal and Chlorine is a non-metal they will undergo an ionic reaction in which Sodium will lose an electron and donate it to the Chlorine atom which will gain an electron. This will create a p...
GS
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ABCD is a rhombus on a graph. B(7,10). AC: y=7-4x. Find an equation for DB in the form tx+py+r=0 where t,p&r are integers.

AC and DB must be perpendicular therefore m 1 m 2 = -1. (we can work out the gradient of DB)-4 m 2 = -1 -----> m 2 = 1/4The equation of a line is y-y 1 =m(x-x 1 ) (sub in x, y and gradient values)y - 7 = ...
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Answered by Alexander L. • Maths tutor
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An industrial process converts the alkene ethene into ethanol, according to the following reaction: C2H4 + H2O --> CH3CH20H. What mass of ethanol can be made from 53g of ethane, given that the water is in excess. (2 marks) (6-7 grade)

This question is all about using the mols equation question (mols = mass/molecular weight). It's best to break it down into steps: 1) calculate the molecular masses of the compounds that are involved in the ...
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Answered by Charlie S. • Chemistry tutor
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