Quarter Exam GenChem1

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

• 1,5,3,4
• 2,10,6,8
• already balanced
• 1,5,5,4

Balance this reaction: ____ BaS + ____ PtF₂ ---> ____ BaF₂ + ____ PtS

• 1,1,1,1
• 1,2,1,1
• 1,1,1,2
• 2,1,1,1

MgCl₂ represents a chemical

• Element

• Chemical Formula

• Subscript

• Coefficient

The substances listed on the right side of a chemical equation are the

• Coefficients

• Reactants

• Products

• Precipitates

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

How many different kinds of elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

How many atoms of Hydrogen are in the following formula?

3C₂H₆

• 3

• 6

• 9

• 18

Which is the Law of Conservation of Matter?

• matter cannot be created or destroyed, it only changes form
• matter can be created but it cannot be destroyed, it never changes form
• matter can be destroyed but it cannot be created, it usually just changes form
• matter is an unproven theory created by Hans Geiger

PCl₅ +H₂O --> POCl₃ +HCl. How many chlorine (Cl) atoms?

• Reactants: 5; Products: 3

• Reactants 5; Products 5

• Reactants 5: Products 4

• Reactants 3; Products 5