Question

Select the description of each substance given by each chemical formula

One molecule of O2 is made of
The compound Al2O3 is made o
one atom of oxygen.
The compound KOH is called
one atom of osmium.
two atoms of oxygen.
DONE

Answer 1

1. Two atoms of oxygen

2: Two atoms of aluminum to three atoms of oxygen

3. Potassium Hydroxide

Step-by-step explanation:

Answer 2

• One molecule of O₂ is made of ↔ two atoms of oxygen.

• The compound Al₂O₃ is made of ↔ two atoms of aluminum and three atoms of oxygen

• The compound KOH is called ↔ potassium hydroxide

• One atom of osmium ↔ Os

Step-by-step explanation:

Chemical formulas are the representation of elements or compounds using the chemical symbol of the elements and some subscripts to indicate the ratio of the elements in the compound.

1. One molecule of O₂ is made of ↔ two atoms of oxygen.

• O is the chemical symbol of oxygen
• The subscript 2 to the right of the chemical symbol indicates that two atoms of oxygen are bonded together in a molecule.

2. The compound Al₂O₃ is made of ↔ two atoms of aluminum and three atoms of oxygen

• Al is the chemical symbol of aluminum.
• O is the chemical symbol
• The subscripts to the right of each one indicates the ratio of two atoms of aluminum per 3 atoms of oxygen in the compound.

3. The compound KOH is called ↔ potassium hydroxide

• K is the chemical symbol of potassium
• The union on a metal with the ion OH⁻ are named hydroxides
• Since the oxidation state of potassium is +1 and the oxidation state of OH is -1, they both combine in a proportion 1:1

4. One atom of osmium ↔ Os

• The chemical symbol of osmium is Os.
• Os in a chemical equation means one atom of Os.