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An industry is producing copper sulphate (CuSO4) from copper carbonate (CuCO3) and sulphuric acid (H2SO4). The company calculated that from 800 g of CuCO3 they will produce 1kg of CuSO4. However they only produced 900g. What is the percentage yield ?

The percentage yield is calculated in the following way: (Actual yield/Theoretical yield)*100 Here, the actual yield is 900g and the theoretical yield that the company calculated is 1kg. First , we have to c...
DL
Answered by Dora L. • Chemistry tutor
2882 Views

pressure = 2.3 × 10^5 Pa temperature= 200K. At a constant volume, when the temperature increases to 300K what is the pressure in Pa?

Divide pressure by temperature to get the constant = 1150. Making sure all values are in the correct units.Then multiply by 300K to get the increased pressure. 3.45 x 10^5 Pa
RP
Answered by Rebecca P. • Physics tutor
2306 Views

How do we complete the square with questions involving a number stuck with the x-squared?

Let me show you an example:Complete the square for the following equation....4x 2 + 8x - 91) Divide the whole equation by 4, as this is the easiest way to make things simple. It allows us to complete the squ...
DS
Answered by Dhruv S. • Maths tutor
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'Economic depression was the main reason Hitler came to power', to what extent do you agree? (16 marks)

When answering a GCSE 16 mark question it is important to make sure you plan the main points you are going to use in your answer. Your plan does not have to be extensive, it can be a simple list or spider di...
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Answered by Francesca S. • History tutor
4879 Views

An exam has two papers. Alan scores: 33 out of 60 on paper 1 & 75 out of 100 on paper 2. Work out his percentage score for the exam?

His total score is 33+75=108The total marks of the exam is 60+100=160His score as a fraction of the total marks is 108/160To find his percentage score, multiply 108/160 by 100 which is 67.5%
AH
Answered by Alan H. • Maths tutor
11301 Views