The third one down: "When barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container."
This is because an endothermic reaction [process] takes in more energy than it releases. Therefore because a decrease in energy leads to a decrease in temperature, the ice crystals forming show that it must be a endothermic reaction [process].
Hope this helps! :)
AJ
.3333333 as a repeating decimal
A machine called a barometer is what is used to measure atmospheric pressure :D
Answer:
Potassium selenide
Explanation:
Potassium selenide (K2Se)
