Top answers

¿Si pudieras viajar en cualquier país de América Latina, qué país visitarías y por qué?

This is a typical A Level or Pre-U style Spanish discursive writing or oral question which requires the candidate to respond using a range of tenses and sophisticated vocabulary to talk about things relevant...
Answered by • Spanish tutor
2270 Views

Calculate the pH of a 0.025 mol dm-​3​ solution of methanoic acid. For HCOOH, Ka = 1.58 x 10-​4​ mol dm-​3

This question is an acid calculation question so it requires you to recall key formulas relating to weak acids. As the Ka of HCOOH has been given, I would start by writing an expression for Ka. Ka= [HCOO-​ ]...
RH
Answered by Radia H. • Chemistry tutor
17065 Views

How are animals adapted for effective gas exchange?

Many alveoli which provide a large surface area for rapid diffusion. The walls of the capillaries are only one cell thick which provides a short diffusion pathway, allowing rapid diffusion. Blood circulation...
RV
Answered by Rose V. • Biology tutor
3431 Views

The Tour de France is 2162miles long. A cyclist knows his average speed his 12.37 miles/hour from his previous races. For the Tour de France the cyclist knows he will cycle for 10 hours a day. Estimate how many days it will take him to complete the race.

First you must figure out your estimates, in this case you can round 2162 down to 2000 and 12.37 to 10 to make your solutions easier. First you must calculate the total number of hours it is going to take hi...
Answered by • Maths tutor
3806 Views

Discuss the ways in which Stevenson depicts male oppression in victorian society in Dr Jekyll and Mr Hyde

Stevenson challenges victorian beliefs through the use of the metaphor " So recently restrained down". This seeks to express how victorian men felt entrapped in their own state of mind, as they wer...
DL
5796 Views