Chem Review 1

What is 50 C in Kelvin?

• 223
• 323
• 100
• 50

Which equation is a double displacement reaction?

• Cl₂ + 2KI --> 2KCl

• Fe + O₂ --> Fe₂O₃

• CaCO₃ --> CO₂ + CaO

• CaCO₃ + 2HCl --> CaCl₂ + H₂CO₃

What are the products for a reaction between KCl and AgNO₃

• KAg + ClNO₃

• KCl + AgNO₃

• KNO₃ + AgCl

• no reaction occurs

 Mg  +  ___ HCl  →   MgCl₂  +   H₂

• 1
• 2
• 3
• 4

Which side of a chemical equation is the reactant side?

• Left (before the yields sign)
• Right (after the yields sign)

Which side of a chemical equation os the product side?

• Left (before the yields sign)
• Right (after the yields sign)

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4