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Are holidays important to you? Why, or why not?

Le vacanze sono molto importanti per me perché mi piace molto viaggiare. Ogni estate, parto in vacanza con i miei genitori per due settimane. L'anno scorso siamo andati in Italia. La mia città preferita è...

AD
Answered by Alice D. Italian tutor
1685 Views

2-chloropropanoic acid has a Ka of 1.48E-3. Write an expression for Ka and hence or otherwise, calculate the pH of a 0.35M solution of 2-chloropropanoic acid

In these multiple part questions, it is often the case that the previous part of the question will provide necessary information for answering the following parts, as hinted by the use of 'hence'. It's ve...

CM
Answered by Colin M. Chemistry tutor
7635 Views

Butane, C4H10 is burned completely in excess oxygen, write the balanced chemical formula for the reaction, name the products and type of reaction.

We need to think about the number of atoms of each element in the reactants and ensure these are the same in the products.

This is the basic UNBALANCED equation.

C4H10 ...

CJ
Answered by Callum J. Chemistry tutor
28110 Views

A cup of boiling water (100 degrees C) (0.2kg) transfers 20 000J of heat to its surrounding in 1 hour. What temperature is the water in the kettle after 1 hour?

To answer this we need to use the equation Q = MC(T1-T2)

We want to know what T2 is (ie the temperature after one hour).

So rearrange the equation to get T2 = T1 - Q/MC

No substitute ...

CJ
Answered by Callum J. Physics tutor
3345 Views

How should I properly use a semi-colon?

There are many different ways in which a semicolon can be used. 

The first, and the most common is to link two similar clauses together. For example, you could say, 'The lady had a cat. The cat was...

FO
Answered by Fern O. English tutor
2154 Views

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