CHM1025C Module One Sample Test Answers
Part
C1: Compounds and Chemical Formulas (Section3.4)
1.
State the Law of
Definite Composition:
The principle that states a compound always
contains the same elements in the same proportions by mass (also known as the
Law of Definite Proportions) (Section 3.5)
2.
Define Molecule:
A single particle composed of nonmetal atoms
(section 3.5)
3.
The chemical
formula for vitamin B3 is: C6H6N2O
In One Molecule How Many:
__6__ carbon atoms
__1__ oxygen atoms
__15__ 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:
C8H11NO3
How many
total atoms are there in one Vitamin B6 molecule?
23
5.
Citric Acid (in
citrus fruit) has the following chemical formula:
C3H4OH(COOH)3
In one
molecule of Citric Acid, How many:
__6___Carbon atoms
__7___Oxygen Atoms
__8___ Hydrogen Atoms
__21___ total atoms