Balancing Equations and Types of Reactions

In this image, what are the substances to the left known as?

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.HS-PS1-2

In this image, NaCl (in black) is a _____________.

• Product

• Reactant

• Subscript

• Coefficient

Tags

NGSS.HS-PS1-2

Read the following chemical formula: C₆H₁₂O₆. How many hydrogen atoms are in the formula?

• 12
• 6
• 4

Tags

NGSS.MS-PS1-1

The law of conservation of mass states that....

• Matter can be created

• Matter can be destroyed

• Matter can neither be created or destroyed

• Energy can neither be created or destroyed

Tags

NGSS.HS-PS1-7

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

• Coefficient 
• Subscript
• Atom
• Equation

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge

• subscript

• random number

• coefficient

Is this balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• NO!

Tags

NGSS.HS-PS1-7

How should the coefficients read when this equation is balanced? (left to right) __Al + __O₂ --> 2 Al₂O₃

• 2, 1, 2

• 4, 3, 2

• 2, 3, 2

• 4, 1, 2

Tags

NGSS.HS-PS1-7

T/F In the equation 2Mg + O₂ ---> 2MgO there are 2 magnesium AND 2 oxygen atoms in the products.

• True

• False

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7