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Describe the principles of how paper chromatography works

Paper chromatography separates a mixture of solutions by their various solubilities. The less soluble components have a higher affinity to the stationary phase (the paper strip) while more soluble components...
RD
Answered by Rebekah D. • Chemistry tutor
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An equation for the reaction is: NiO + C = Ni + CO Calculate the percentage atom economy for the reaction to produce nickel. Relative atomic masses (Ar): C = 12 Ni = 59 Relative formula mass (Mr): NiO = 75 Give your answer to 3 significant figures.

Atom economy is a percentage value which tells you how efficient the product is in comparison to the amount of reactant used.Equation to learn: atom economy = Ar of useful product/Ar of reactant Substitute t...
PR
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Calculate the concentration of Sodium Chloride, NaCl, if you have 0.0010 moles in 55cm^3

Most important Chem equation to know: moles = concentration x volumerearrange the equation as you want to find out the concentration: concentration = moles/volume substitute in the given values: concentratio...
PR
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A student needs 0.2 moles of hydrochloric acid to conduct a reaction. How many milliliters of a 0.5 M HCl solution does the student need?

The student needs 0.2 moles of the reactant and is supplied with the 0.5 molar solution. To work out the number of milliliters needed, the student needs to divide the number of moles by the molarity and mult...
ZG
Answered by Zuzanna G. • Chemistry tutor
1939 Views

Explain why the noble gases are inert.

Atoms in group 8 have a full outer electron shell. This means they don't have a tendency to lose, gain or share electrons with other elements to achieve a full outer shell. This explains why they don't form ...
CP
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