CHM1025C Module One Sample Test
Part
C1: Compounds and Chemical Formulas (Section3.4)
1.
State the Law of
Definite Composition:
2.
Define Molecule:
3.
The chemical
formula for vitamin B3 is: C6H6N2O
In One Molecule How Many:
_____ carbon
atoms
_____ oxygen
atoms
_____ total
atoms
4.
Write the
chemical formula for Vitamin B6 which has eight Carbon atoms, 11
Hydrogen atoms, one Nitrogen atom, and three Oxygen atoms:
How many
total atoms are there in one Vitamin B6 molecule?
5.
Citric Acid (in
citrus fruit) has the following chemical formula:
C3H4OH(COOH)3
In one
molecule of Citric Acid, How many:
______Carbon
atoms
______Oxygen
Atoms
______
Hydrogen Atoms
______ total atoms