Chemistry Honors Unit 9 Chemical Rxns Review

A chemical reaction is a process in which:

• products change into reactants

• substances only change from one state into another

• the law of conservation of mass is applied

• all are correct

During a chemical reaction:

• new elements are produced

• atoms are rearranged

• atoms are destroyed

• elements are destroyed

Tags

NGSS.HS-PS1-7

An already written equation is balanced by:

• erasing elements

• adding elements

• changing subscripts

• adding coefficients

What are the reactants in the following chemical equation:

Zn + CuSO₄ -----> ZnSO₄ + Cu

• zinc and copper

• zinc sulfate and copper

• zinc only

• copper (II) sulfate and zinc

Predict the products that will form if aluminum oxide react with potassium metal?

• potassium aluminum oxide

• aluminum + potassium oxide

• potassium aluminum + oxygen gas

• oxygen gas + potassium metal + aluminum metal

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are the products in the equation?

Zn + CuSO₄ ------> Cu + ZnSO₄

• zinc and copper (II) sulfate

• copper and zinc sulfate

• copper and zinc

• zinc only

Tags

NGSS.MS-PS1-2

Given the following equation what are the coefficients?

___Fe + ___O₂ ----> ___Fe₂O₃

• 2,3,4

• 2,3,2

• 2,2,2

• 4,3,2

What type of reaction is the following equation?

___Fe + ___O₂ ----> ___Fe₂O₃

• single replacement

• double replacement

• combustion

• synthesis

• decomposition

What are the coefficients for the following reaction?

​ (a)   C2H6 + ___O2 ----> ___CO2 + ____H2O

• 1,2,2,3

• 2,5,4,3

• 2,7,4,6

• 1,3,2,3

When a reaction produces/gives off energy as a by-product of the reaction, it is a(n) _________ reaction.

• redox

• endothermic

• exothermic

• neutralization

• evaporation

Tags

NGSS.HS-PS1-4