If it takes 3 hours to drive a distance of 192km on a freeway, what would be your average speed in km/h? You can use a calculator.

The average speed in km/h would be 64km per hour.

Speed = Distance /Time

192/3 = 64

Explanation:

I hope this helps

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.

just did the assignment and the answer was #1 +2 n