Find the mass of one mole of carbon dioxide molecules in units of grams. Show how you reached your answer.

The mass if 44 g

Explanation:

CO₂ = Carbon dioxide

Molar mass is (Mass of oxygen . 2 + Mass of carbon) =

16 .2 + 12 = 44 g

This is the mass of carbon dioxide which corresponds to 1 mol

1 mol has 6.02×10²³ molecules so the mas of one mole of carbon dioxide molecules weighs 44 g

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.