Atoms in Chemical Reactions

The chemical formula for sulfuric acid is H₂SO₄.

In 2H₂SO₄, the number of sulfur atoms is ___?

• 1

• 2

• 4

• 8

Tags

NGSS.MS-PS1-1

The chemical formula for sulfuric acid is H₂SO₄.

In 2H₂SO₄, the number of oxygen atoms is _____?

• 1

• 2

• 4

• 8

Tags

NGSS.MS-PS1-1

When sodium reacts with chlorine, sodium chloride is produced.

Andrew represented this reaction with this equation:

Na + Cl₂ → 2NaCl

The equation is _____________.

• balanced

• not balanced

Tags

NGSS.MS-PS1-5

When sodium reacts with chlorine, sodium chloride is produced. Andrew represented this reaction with this equation:

__Na + __Cl₂ →__NaCl

Which set balances the equation?

• 1,1,1

• 1,2,1

• 1,1,2

• 2,1,2

Tags

NGSS.MS-PS1-5

When butane burns in oxygen, it produces carbon dioxide and water. This reaction is represented in this equation:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

How many atoms of carbon (C) on each side of the equation?

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

When butane burns in oxygen, it produces carbon dioxide and water. This reaction is represented in this equation:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

How many atoms of oxygen (O) on each side of the equation?

• 2

• 13

• 15

• 26

Tags

NGSS.MS-PS1-5

When butane burns in oxygen, it produces carbon dioxide and water. This reaction is represented in this equation:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

How many atoms of hydrogen (H) on each side of the equation?

• 10

• 12

• 20

• 26

Tags

NGSS.MS-PS1-5

Iron reacts with oxygen to produce iron oxide (rust). This reaction is represented in an equation as 4Fe + xO₂ → 2Fe₂O₃.

Identify the value of x that will balance the equation.

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

The chemical formula for artificial sweetener is C₇H₅NO₃S.

Match the elements with the numbers found in one molecule of artificial sweetener.

carbon

• 1

• 3

• 5

• 7

• No Answer

Tags

NGSS.MS-PS1-1

The chemical formula for artificial sweetener is C₇H₅NO₃S.

Match the elements with the numbers found in one molecule of artificial sweetener.

hydrogen

• 1

• 3

• 5

• 7

• No Answer

Tags

NGSS.MS-PS1-1