10. Concepts in Chemistry: Relative Masses & Chemical Formulaes Flashcards
1
Q
What is Relative Formula Mass?
A
RFM (M) of a compound is the relative atomic masses (A) of all the atoms in its formula added together
2
Q
What are RFM of :
i) Magnesium Chloride MgCl2 and
Ii) Calcium Hydroxide Ca(OH)2
A
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3
Q
What is the M of a compound equal to?
A
- Mass in grams of 1 mole of the compound
4
Q
What is Empirical Formula?
A
Simplest / smallest whole number ratio of atoms in the compound
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5
Q
What is Empirical Formula of Glucose C6H12O6?
A
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6
Q
How do you work out the Molecular formula?
A
Empirical formula of compound, together with its M gives Molecular formula
7
Q
Compound X has empirical formula C2H6N. The M of the compound X is 88. Find molecular formula of compound X.
A
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