Chemical Equation

Presentation

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Chemistry

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8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-5, MS-PS1-1, HS-PS1-7

Standards-aligned

Saima Zaidi

Used 81+ times

FREE Resource

11 Slides • 19 Questions

Chemical Equation

Multiple Choice

The blue numbers in the image below represent ________

element symbol

coefficients

subscripts

yield

Multiple Choice

How many Nitrogen (N) atoms are in 4NH₃?

Multiple Choice

What does the number 4 represent in 4NH₃?

Subscript

Superscript

Coefficient

Multiple Choice

What does the number ₃ represent in 4NH₃?

Subscript

Superscript

Coefficient

Multiple Choice

How many atoms of sulfur are in each molecule of H₂SO₄?

Multiple Select

The formula shown here represents the breakdown of a metal into rust. What elements are involved in this reaction? Check all that apply. $4Fe\ +\ 3O_2\ \rightarrow\ 2Fe_2O_3$

Iron

Oxygen

Carbon

Nitrogen

Multiple Choice

$C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2$
Given this chemical equation, what are the PRODUCTS?

$C_2H_{6\ }and\ 5O_2$

$2CO_2\ and\ 3H_2O_2$

Multiple Choice

$C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2$
Given this chemical equation, what are the REACTANTS?

$C_2H_{6\ }and\ 5O_2$

$2CO_2\ and\ 3H_2O_2$

Multiple Select

Which of the following represent chemical equations? Check all that apply.

$2Na\ +\ H_2O\ \rightarrow\ 2NaOH\ +\ H_2$

$2KClO_3\ \ \rightarrow\ 2KCl\ +\ 3O_2$

$2Fe\ +\ 3O_{2\ }\rightarrow\ 2Fe_2O_3$

$2H_2O$

$3O_3\ ,\ H_2O$

Multiple Choice

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

yes

Multiple Choice

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

Yes!

No!

Multiple Choice

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

Multiple Choice

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.

Multiple Choice

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

Multiple Choice

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

4Fe + 3O₂ -> 2Fe₂O₃

2 Fe + 3O₂ -> Fe₂O₆

4 Fe + O₆ -> 2Fe₂O₃

None of the options are correctly balanced.

Multiple Choice

Review the image and then pick the scenario below which best illustrates the Law of Conservation of Mass.

A scientist adds 5g of Substance A to 5g of Substance B. A reaction occurs that produces 10g of Substance C.

A scientist adds 5g of Substance A to 5g of Substance B. A reaction occurs that produces 15g of Substance C.

Multiple Choice

To balance a chemical equation, it may be necessary to adjust the

formulas of the products

subscripts

coefficients

number of products

Multiple Choice

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is doubled

the product is half the mass of the reactants

the mass is the same

the mass changes depending on the reaction

Multiple Choice

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

1, 2,1

already balanced

2,1,1

1,1,2

Chemical Equation

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