Snapquiz - Empirical Formula

This is the Snapquiz on Empirical Formula. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. Butene contains four carbon atoms and eight hydrogen atoms. What is its empirical formula (not its molecular formula)?

CH2
C4H8
CH
C2H4


Question 2. Which is the correct sequence of values to calculate to find the empirical formula?

Ratio, Ar values, Masses, Division.
Masses, Ar values, Division, Ratio.
Ar values, Division, Ratio, Masses.
Division, Masses, Ar values, Ratio.


Question 3. A carbon oxide is found to have a 1:1 ratio of carbon to oxygen. What is its correctly-written empirical formula?

C1O1
CO2
CO
C2O


Question 4. Sulphur has an Ar value of 32 and oxygen has an Ar value of 16. A sulphur oxide contains 6.4g of sulphur and 6.4g of oxygen. What is the empirical formula of the sulphur oxide?

SO
S2O2
S2O
SO2


Question 5. If a compound has a 1:2 ratio of carbon atoms to oxygen atoms, what is its chemical formula?

CO.
CO2.
OC2.
C2O.


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