A substance composed of 2 or more elements in a fixed, definite proportion is considered
A) a homogeneous mixture.
B) a heterogeneous mixture.
C) a compound.
D) a solution.
E) an alloy.
Question 2
What is the empirical formula for C4H10O2?
A) C2H5O
B) CHO
C) C2H4O
D) CHO2
E) CH2O