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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. ...

DL
Answered by Dora L. Chemistry tutor
2488 Views

explain why a lack of thiamine (vitamin B1) causes a build up of lactate in cells

Thiamine is a co-enzyme for pyruvate dehydrogenase (PHD) the enzyme that converts pyruvate into acetyl-CoA at the start of the Krebs cycle, the 2nd stage of respiration. Without thiamine the activity of P...

JO
3327 Views

How does Aeschylus contrast his presentation of the Persians and the Greeks?

In The Persians, Aeschylus' presentation of the Persians contrasts against his presentation of the Greeks. One of the primary differences between Persians and Greeks is the depiction of the notio...

EB
4495 Views

In a DNA molecule 28% of all bases found were Adenine. What are the remaining bases and their percentages in this molecule?

first remember your base pairs: Adenine binds to Thymine and then Cytosine binds to Guanine. So if 28% are Adenine then 28% must also be Thymine. 28+28= 56% so 100-56 gives you the remaining percentage wh...

JO
Answered by John O. Biology tutor
20592 Views

How can I approach this essay question: ‘MacDonald betrayed the Labour Party during his second ministry, 1929–31.’ How far do you agree?

Before getting into writing you should start by analysing the question and making sure you know what it's asking you to do. In this case, you need to have some idea of how a politician could 'betray' his ...

MR
Answered by Mark R. History tutor
3967 Views

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