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La France connait-elle un retour des croyances?

"Où l'homme cesse de connaitre, il commence à croire." écris F. Nietzsche dans La Naissance De La Philosophie.
Si comme le propose Nietzsche on comprend la croyance comme l'échec de la com...

Answered by Constance G. • French tutor

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If 3x =15 and x+y =7 what is (3y)^2?

First divide 15 by 3 to find xx= 15/3 = 5Now use x to find yx +y = 7 substitue x. 5+y=7y= 7-5= 2Now you know x=5 and y=2 use this to calculate the answer, remembering to do the sum within the brackets fir...

Answered by Lavana C. • Maths tutor

2977 Views

Differentiate the following equation, y = x^9 + 3x^2 + x^(-1)

dy/dx = 9x⁸+ 6x - x^-2

Answered by Emma L. • Maths tutor

3141 Views

Describe a test that could be used to distinguish between potassium sulfate (K2SO4) and potassium nitrate (KNO3)

Add a solution containing Barium ions (eg BaCl2, Ba(OH)2, etc)K2SO4 will form white precipitateKNO3 will have no visible change

Answered by Isobel W. • Chemistry tutor

15505 Views

An aldehyde CH3CH2CH2CHO reacts with potassium cyanide (KCN) to form a racemic mixture of two stereoisomers of CH3CH2CH2CH(OH)CN. A)Explain why a racemic mixture is formed and b)describe how you would distinguish between 2 samples of the stereoisomers

A) The aldehyde contains a planar carbon group which can be attacked from both sides. Each side has equal probability of being attacked resulting in a ra...

Answered by Isobel W. • Chemistry tutor

8482 Views