Relative Formula Mass (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the symbol used for relative atomic mass?
What is the symbol used for relative atomic mass?
Ar
Which atom is used as the standard for comparing relative atomic mass?
Which atom is used as the standard for comparing relative atomic mass?
Carbon-12
Where can you find the Ar values for different elements?
Where can you find the Ar values for different elements?
On the periodic table
What units does relative atomic mass (Ar) have?
What units does relative atomic mass (Ar) have?
No units
What is the symbol for relative formula mass?
What is the symbol for relative formula mass?
Mr
What type of substance do we use relative formula mass (Mr) for?
What type of substance do we use relative formula mass (Mr) for?
Compounds
What is the first step in calculating the Mr of a compound?
What is the first step in calculating the Mr of a compound?
Find the chemical formula
When calculating Mr, what do you do with the Ar value of each element?
When calculating Mr, what do you do with the Ar value of each element?
Multiply by number of atoms, then add
How many oxygen atoms are in carbon dioxide ()?
How many oxygen atoms are in carbon dioxide ()?
2
What is the Mr of carbon dioxide ()? (Ar of C = 12, O = 16)
What is the Mr of carbon dioxide ()? (Ar of C = 12, O = 16)
44
How do ionic compounds like sodium chloride (NaCl) exist?
How do ionic compounds like sodium chloride (NaCl) exist?
As a lattice of ions
What units does relative formula mass (Mr) have?
What units does relative formula mass (Mr) have?
No units