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Outline the structure of the personality according to the psychodynamic approach (4 marks)

According to psychodynamic approaches, the personality is made up of three main components. The id is focuses on the self and an individual's core needs. It is often thought to be mainly concerned with se...

Answered by Charlotte H. • Psychology tutor

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Solve the simultaneous equations, x^2+y^2=41, and y=2x-3

STEP 1) First, substitute 2x-3 into the quadratic equation, replacing y, which works out as x²+(2x-3)²=41STEP 2) Now, expand the bracket, (2x-3)

Answered by Hannah N. • Maths tutor

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The line y = 3x-4 intersects the curve y = x^2 - a, where a is an unknown constant number. Find all possible values of a.

For the line and the curve to intersect we need the for the following system of equations to have a solution. y = 3x AND y = x² - aThe solutio...

Answered by Hasnat K. • Further Mathematics tutor

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A point A lies on the line y = 2x^2 - 8x + 2. A has y-coordinate (-4). Find all possible values for the x-coordinate of A.

The point A = (x', y') lies on the line y = 2x² - 8x +2. And we are given that y' = -4.Therefore we have tha...

Answered by Hasnat K. • Maths tutor

2683 Views

50.0 g of propene reacts with hydrochloric acid to produce 1-chloropropane. Calculate the percentage yield if only 54.0g is made.

STEPS:Write the equation CH3CHCH2 + HCl -> CH3CH2CH2Cl + H2 (where 1-chloropropane made by electrophilic addition reaction)Identify number of moles of propene used. So number of moles is m/ Mr= 50.0g ...

Answered by Ravinder K. • Chemistry tutor

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