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