Writing Formula Equations

K⁺, O^-2

• KO

• K₂O

• K_-2O₂

• O₂K

Tags

NGSS.MS-PS1-1

Ca⁺², O^-2

• CaO

• OCa

• Ca_-2O₊₂

• Ca₂O₂

Tags

NGSS.MS-PS1-1

What is the correct formula for hydrochloric acid?

• HClO

• ClO₃

• HCl

• HCO₃

The chemical formula for an ionic compound of aluminum and chlorine is

• AlCl.

• ClAl.

• AlCl₃.

• Al₃Cl.

Tags

NGSS.MS-PS1-1

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• An Atom

• The Subscript

• A Molecule

• The Coefficient

How many total atoms are in this formula?

• 1

• 2

• 6

• 7

Tags

NGSS.MS-PS1-1

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• A Molecule

• The Coefficient

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

Tags

NGSS.MS-PS1-1

Drag the answers to make the chemical equation for the following:

silver nitrate plus sodium chloride yields silver chloride and sodium nitrate

​ (a)   + ​ (b)   --> ​ ​ (c)   ​ + ​ ​ ​ (d)  

• AgNO3

• NaCl

• AgCl

• NaNO3

Answer explanation

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How would you write the equation for: Solid magnesium is burned in oxygen gas to produce solid magnesium oxide?

• Mg(s) + O₂ (g) → MgO (s)

• Mg (s)+ O (g) → MgO (s)

• Mg (s) + CO₂ → MgO(s) + C(s)

• Mg + O₂→ Mg₂O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5