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GCSE AQA Chemistry > The Equations > Flashcards

The Equations Flashcards

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1
Q

What is the formula for calculating the mass of something?

What is the formula for calculating the number of moles of something?

What is the formula for calculating the molecular mass of something?

A

Mass= Moles x Molecular Mass

Moles= Mass -:- Molecular Mass

Molecular Mass= Mass -:- Moles.

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2
Q

What is the formula for calculating the percentage mass of an element in a compound?

A

Percentage mass of an element in a compound= Ar x Number of atoms of that element -:- Mr of the compound x 100.

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3
Q

What is the formula for calculating the atom economy of a reaction?

A

Relative formula mass of desired product -:- Sum of relative formula masses of reactants x 100.

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4
Q

What is the formula for calculating the volume of any gas?

What is the formula for calculating the number of moles in a gas?

A

Volume of Gas= Mass of Gas -:- Mr of Gas x 24

Number of moles of a gas= Volume (in dm3) -:- 24 (at RTP).

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5
Q

What is the formula for calculating the concentration of a solution in g/dm3?

What is the formula for calculating the concentration of a solution in mol/dm3?

A

Concentration= Mass of Solute -:- Volume of Solvent

Concentration= Number of Moles -:- Volume of Solvent.

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6
Q

What is the formula for calculating the concentration of a substance?

What is the formula for calculating the number of moles of a substance?

What is the formula for calculating the volume of a substance?

A

Concentration= Number of Moles -:- Volume

Number of Moles= Concentration x Volume

Volume= Number of Moles -:- Concentration.

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7
Q

What is the equation used to convert mol/dm3 to g/dm3?

A

Mass= Moles x Molecular Mass.

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8
Q

What is the formula for calculating the percentage yield of a reaction?

A

Percentage Yield= Mass of product actually made -:- Maximum theoretical mass of product x 100.

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9
Q

What is the formula for calculating the number of moles in a titration experiment?

A

Number of Moles= Concentration x Volume.

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10
Q

What is the formula for calculating the retention factor of a substance?

A

Rf= Distance moved by the sample -:- Distance moved by the solvent.

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11
Q

What is the formula for calculating the rate of a reaction?

A

Rate of Reaction= Amount of reactant used or amount of product formed -:- Time.

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12
Q

What are the five types of reactions of alkenes?

A

Reactions in combustion

Addition of Hydrogen

Addition of Halogens

Addition of Hydrochloric Acid (HCL)

Addition of Water (H2O).

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GCSE AQA Chemistry (17 decks)

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