Balancing Equations 1

The diagram represents a molecule of butane. What is the correct formula for butane?

• C₂H₅

• C₄H₈

• C₄H₁₀

• C₈H₄

Tags

NGSS.MS-PS1-1

A rock sample contains three different compounds (ores). They are galena (PbS), copper pyrites (CuFeS₂), and cinnabar (HgS). How many different types of metals are in the rock sample?

• 3

• 4

• 5

• 8

How many atoms of metals and non-metals are shown in the formula Na₂SO₄?

• A

• B

• C

• D

Diagrams W, X, Y and Z represent different compounds. In the same order, W to Z, which row correctly identifies all of the compounds?

• NO₂ ; CO₂ ; H₂O ; SO₂

• NO₂ ; H₂O ; SO₂ ; CO₂

• SO₂ ; CO₂ ; NO₂ ; H₂O

• SO₂ ; NO₂ ; H₂O ; CO₂

The diagram shows a molecule of a compound. What is the correct formula of the compound?

• C₂H₃BrCl₂

• C₂H₃ClBr₂

• C₃H₂ClBr₂

• C₃H₂BrCl₂

What is the correct formula of the molecule shown here?

• OH

• H₂O₂

• (OH)₂

• 2OH

Which formula contains the most atoms?

• NaOH

• Rb₂S

• SiBr₄

• SnO₂

What do the chemical symbols N₂ and Ni represent?

• A

• B

• C

• D

What do the chemical symbols CO₂ and H₂ represent?

• A

• B

• C

• D

The element phosphorous burns in air, as shown by the balanced equation. What does the formula P₄O₁₀ show?

• A mixture of atoms of two elements.

• A mixture of molecules of two elements.

• A molecule of a compound.

• An atom of a compound.