Top answers

Calculate the largest share when £400 is shared in the ratio 1 : 2 : 5.

To calculate the largest share, first we need to find out how much each part that makes up a share is worth. To find out how much the smallest part is (i.e 1 part), we divide the value £400 by the sum of the...
JS
Answered by Joseff S. • Maths tutor
26148 Views

Explain why average bond enthalpies can be used for cyclohexane but not for benzene

Benzene has a resonance structure while cyclohexane consists of only single bonds of the same length. Benzene's resonance structure means it has intermediate bond lengths and strengths. This means average bo...
CM
Answered by Chloe M. • Chemistry tutor
4389 Views

Calculate the pH of a 4.00 x 10^-2 mol dm^-3 solution of Ba(OH)2

The easiest way to answer this question is by using the equation pH + pOH = 14. Firstly, we need to work out the number of moles of OH - in the solution. As the formula for Ba(OH) 2 shows that it has 2 moles...
CM
Answered by Chloe M. • Chemistry tutor
14653 Views

In a formal situation, how do I introduce myself in spanish?

In formal contexts, such as job interviews or academic presentations, you shouldn't use slang or coloquial phrases, but a polite structure, such as: "Mi nombre es..." instead of "Me llamo...&q...
RR
Answered by RENE R. • Spanish tutor
3489 Views

How do I solve the simultaneous equations 5x - 3y = -1 and 3x + y = 5?

One method of solving these is by elimination . We can try to subtract a multiple of one equation from the other to cancel the x's (or y's). 5x - 3y = -1 (A) 3x + y = 5 (B) In this case, we can add 3*(equati...
AK
Answered by Alex K. • Maths tutor
13547 Views