mole
Directions. Choose the letter of the best answer. Write the chosen letter on the
space provided before each number.
1.) Aspirin is a compound with the molecular formula C9H804. What is its
percent composition?
A. 40 % C, 4.48 %H, 55.52 % 0
B. 50 % C, 4.48 % H, 45.52 % 0
C. 60 % C, 4.48 %H, 35.52 % 0
D. 80 % C, 4.48 % H, 15.52 %O
2.) A compound of protein called Serine has an approximate molar mass of
100 g/mole. If the percent composition is as follows, what is the molecular
W
formula of Serine?
A. C3 H7 NO3
B. C4 H7 NO3
C. Co H; NO3
D. C8 H7 NO3
3.) Find the molecular mass of glucose, which has a molecular formula
(C6H12 06)?
A. 160.16 B. 180.16
C. 190.16
D. 192.16
1mnown​