Top answers

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
179442 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
6840 Views

Solve the equation (2x+3)/(x-4)-(2x-8)/(2x+1)=1 and give the answer to 2 decimal places

To start off with we need to remove the two denominators (the bottom part of the fractions) on the left hand side of the equation. This can be achieved by multiplying the through the whole equation by (x-4)(...
JJ
Answered by Jake J. • Maths tutor
10129 Views

How should I structure my essay paragraphs?

Think PEEL for a clear structure! Point - State the main argument of your paragraph in the first sentence of your paragraph. Evidence - Provide some evidence that this is true - a fact or statistic. Explain ...
AM
Answered by Anna M. • History tutor
4350 Views

How do white blood cells defend against invading pathogens?

They can engulf and ingest pathogens; this is essentially the white blood 'eats' the pathogen. They secrete (release) antitoxins which counteract the toxins released by pathogens. The toxins they release are...
EM
Answered by Emily M. • Biology tutor
15458 Views