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Chemistry
A Level

Calculate the mass in grams of Iron (III) Chloride in a solution of 500 cm^3 which has a concentration of 0.200 mol/dm^3

First work out the moles of Iron (III) Chloride using the equation concentration = moles/volume, rearranging the eqaution in order to calculate moles gives moles = concentration x volume. Check the units!...

Answered by Simon S. Chemistry tutor
9795 Views

Why do we use the n+1 rule in proton NMR?

The n+1 rule is used to describe the relationship between peak splitting and the number of protons a particular proton is coupled to - that is, how many protons are attached to the carbons next to the car...

Answered by Daisy R. Chemistry tutor
7986 Views

Why does a catalyst speed up a chemical reaction?

A catalyst lowers the activation energy of a reaction. It does this by providing an alternative, lower energy pathway for the reaction. An example of this - a catalyst may form a complex with the reactant...

Answered by Jack L. Chemistry tutor
5803 Views

What is electronegativity?

Electronegativity is the measure of the tendacy/ability of an atom to withdraw electron density in a chemical bonding pair of elcectrons. It is most commonly measured using the pauling scale.

Answered by James P. Chemistry tutor
2067 Views

Calculate the PH of 32 mmol of HCl in 75cm^3 solution. Assume HCl fully dissociates.

32 mmol = 0.032 mol

75cm= 0.075dm3

n = c x v    so   c = n / v

c = 0.032mol/0.075 dm3 = 0.426moldm-3

pH = -log[H+]

pH = -lo...

Answered by Annabelle P. Chemistry tutor
2180 Views

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