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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(OH) 2 shows that it has 2 moles...
CM
Answered by Chloe M. • Chemistry tutor
14708 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
3532 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
13633 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. Personification refers to...
IS
67997 Views

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

Differentiation can be done term-by-term, so we can treat the 5x 3 , -2x 2 and 2 separately. We can also 'take out' the coefficients: to differentiate 5x 3 , for example, differentiate x 3 first and then mul...
AK
Answered by Alex K. • Maths tutor
9759 Views