Top answers

Nobody speaks Spanish at home. How can I practice on my own?

Vocab: Songs, TV, Films. To learn a word you have to see it, hear it and say it at least 5 times. Grammar: Read. Why? Because the more you see grammar in use, the more you will reproduce it in writing and sp...
FC
Answered by Felix C. • Spanish tutor
3783 Views

Explain why chlorine (Cl2) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature.

The melting/boiling point of a substance determines what state of matter it takes at a certain temperature. In Cl2 there are covalent bonds between the atoms forming simple molecules. There are weak attracti...
LW
Answered by Lily W. • Chemistry tutor
178588 Views

At what temperature does the reaction become feasible? When ΔH = 492.7 kJmol^-1 and ΔS = 542.6 JK^-1mol^-1.

When a reaction is feasible ΔG = 0. Rearrange the equation ΔG = ΔH - TΔS. So that when ΔG = 0, T = ΔH / ΔS. Must convert ΔS from JK^-1mol^-1 to kJK^-1mol^-1 by dividing it by 1000. Then plug in numbers given...
LW
Answered by Lily W. • Chemistry tutor
21420 Views

What's the best way of approaching the study of historiography?

Historiography is a term that in my experience unnecessarily frightens some people studying at A-level. In some ways it does represent a shift from simpler primary source based analysis, but in reality, the ...
RV
Answered by Ronan V. • History tutor
4888 Views

How to convert any binary number to decimal?

Let us take a binary number 10010111 . To make conversion easier let us write down numbers 0 to 7 under this binary number starting from the right side. These numbers will represent powers of 2. For each '1'...
MS
Answered by Mantas S. • Computing tutor
6628 Views