Balancing Chemical Equations Challenge

What is the primary reason oxygen prefers to bond with hydrogen rather than itself?

• Oxygen is more stable when bonded to itself.

• Hydrogen is more abundant in nature.

• Oxygen cannot bond with other elements.

• Bonding with hydrogen results in a lower energy state.

What is the main product formed when hydrogen and oxygen react in the space shuttle?

• Water vapor

• Methane

• Carbon dioxide

• Nitrogen gas

Tags

NGSS.MS-PS1-5

In the combustion of methane, what are the products formed?

• Hydrogen and oxygen

• Carbon dioxide and water

• Methane and water

• Methane and oxygen

Why is it necessary to balance chemical equations?

• To change the products formed.

• To obey the law of conservation of mass.

• To create new atoms.

• To ensure the reaction occurs faster.

Tags

NGSS.MS-PS1-5

What does the law of conservation of mass state?

• Matter can be created or destroyed.

• Matter can only change form.

• Mass is irrelevant in chemical reactions.

• Atoms can disappear during reactions.

Tags

NGSS.MS-PS1-5

When balancing chemical equations, what can you adjust?

• Both subscripts and coefficients

• Neither subscripts nor coefficients

• Coefficients

• Subscripts

What is the first step in balancing a chemical equation?

• Remove extra atoms.

• Change the subscripts.

• Count the number of atoms of each element.

• Add coefficients randomly.

In the example of balancing magnesium and oxygen, what was the final coefficient for magnesium?

• 4

• 3

• 2

• 1

Tags

NGSS.MS-PS1-5

What should you do if an element appears in two of the products or reactants?

• Count both of them for that side of the equation.

• Ignore one of them.

• Remove one of them.

• Change the subscripts.

Tags

NGSS.MS-PS1-5

In the advanced example, what was the final coefficient for sodium (Na)?

• 4

• 3

• 2

• 1

Tags

NGSS.MS-PS1-5