Empirical and molecular formula Flashcards

1
Q

What is empirical formula?

A

Simplest whole number ratio of atoms of each element present in a compound

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2
Q

How do you calculate empirical formula?

A

Divide the mass by atomic mass tot calculate the moles. Then, divide the moles by the mallets number of moles for each element to give you the ratio

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3
Q

How do you use percentages to calculate moles?

A

Treat them as the mass

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4
Q

What is molecular formula?

A

Actual number of atoms in each element present in a molecule

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5
Q

What is the equation for molecular formula?

A

Molecular formula = molecular mass / empirical formula to find multiplier

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6
Q

How do you work out the molecular formula?

A

Work out the empirical formula then multiply this by the Mr of the compound

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