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What is meant by the term salt? And how would you confirm if the salt had chloride ions in?

Part 1: "A salt is is when the H + ion in an acid is replaced with a cation (e.g. a metal)" Part 2: You would use the silver nitrate test for halide ions. You add dilute nitric acid (which avoids g...
BQ
Answered by Brendan Q. • Chemistry tutor
3627 Views

Describe how giving a vaccine leads to production of antibodies against a virus

A vaccine is a weakened or dead form of a virus that contains the antigen of that virus. An antigen is a protein on the surface of the virus that allows the body to identify it. Specific T helper cells from ...
OT
Answered by Olivia T. • Biology tutor
9004 Views

Two planes have eqns r.(3i – 4j + 2k) = 5 and r = λ (2i + j + 5k) + μ(i – j – 2k), where λ and μ are scalar parameters. Find the acute angle between the planes, giving your answer to the nearest degree.

Summary of solution: To find the angle between the planes, we must find the normal vector to each plane and then use the scalar product to find the angle between these two normal vectors. Breaking this down ...
DC
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To what extent did the collapse of the League of Nations cause WW2?

It is important to emphasize there were myriad causal factors to World War Two, which began in September 1939 when Hitler invaded Poland. The collapse of the League of Nations was arguably a leading factor, ...
KS
4639 Views

Find the points that the graph "y = x^2 -4x -14" touches the x-axis

(2+3√2, 0) and (2-3√2, 0)
TC
Answered by Thomas C. • Maths tutor
3671 Views