Which of the following is a physical change? CsF(s) + XeFo(s) → CsXeF;(s)
CO2 (s) → CO2 (g)
O N2 (g) + 3H2(g) → 2NH3 (g)
2H2(g) + O2(g) → 2H20 (1)
Zn(s) + 2MnO2(s) + H2O(l) → Zn(OH)2(s) + Mn2O3(s)

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.