What is a mole?
A mole is a unit of measurement for the amount of a substance. One mole is 6.02 x 10^23 particles in a substance, known as Avogadro's constant. This is because this is the number of atoms in 12g of Carbon- 12(the relative atomic mass of the carbon atoms). The molar mass is always equal to the atomic mass of an atom, for example 1 mole of oxygen is equal to 16 grams.
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Related Chemistry A Level answers
All answers ▸You have 3.51g of hydrated zinc sulphate. You heat up the zinc sulphate until all the water has evaporated from it. The weight after heating is 1.97g. Find how many H2O molecules per zinc sulphate molecule there are in the hydrated form of it.
Name the type of reaction and outline the mechanism for the reaction of the alcohol (CH3)2CHOH with the acyl chloride CH3COCl. Explain which orbitals take part in the reaction.
Describe how collision theory explains an increase in the rate of a reaction at higher temperatures.
What is electronegativity?