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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(...

Answered by Chloe M. • Chemistry tutor

14126 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 llam...

Answered by RENE R. • Spanish tutor

3240 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)<...

Answered by Alex K. • Maths tutor

13000 Views

What is the difference between personification, anthropomorphism and pathetic fallacy?

These three literary devices are often misidentified and confused with one another. However, there are some easy ways to work out which one you are observing in use in a given text.

Answered by Imogen S. • English Literature tutor

64534 Views

If y = 5x^3 - 2x^2 + 2, what is dy/dx?

Differentiation can be done term-by-term, so we can treat the 5x³, -2x² and 2 separately. We can also 'take out' the coefficients: to differentiate 5x³, for example, di...

Answered by Alex K. • Maths tutor

9249 Views