Unit 3 Review

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

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-5

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

• Products
• Coefficients
• Precipitates
• Reactants

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Tags

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• Charges
• coefficients
• subscripts
• none of the answers are correct

Tags

NGSS.HS-PS1-7

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. 

Tags

NGSS.MS-PS1-5

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.MS-PS1-5

Balance this equation:

___P₄ + ___O₂ --> ___P₂O₃

• 3 P₄+ O₂ --> 2 P₂O₃

• P₄+ O₂ --> 2 P₂O₃

• P₄+ 3 O₂ --> 2 P₂O₃

• P₄+ 2 O₂ --> 3 P₂O₃

Tags

NGSS.MS-PS1-5

Balance this reaction: ____ NaF + ____ Br₂ ---> ____ NaBr + ____ F₂

• 3,1,2,1
• 1,2,3,4
• 2,1,2,1
• 1,2,1,2

Tags

NGSS.MS-PS1-5