Commercially available cold packs are simple in design: a pouch with water on one side, isolated by a barrier from a specific salt on the other side. When the barrier is broken, the salt and water mix and the solution turns cold. Select which of the statements is true about the reaction occurring in cold packs. O The reaction between the salt and water is endothermic. O The reaction between the salt and water is exothermic. O The reaction between the salt and water is neither endothermic nor exothermic. The cold pack releases heat into the environment. #8
Answers: 3
Chemistry, 22.06.2019 04:30
Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat
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Chemistry, 22.06.2019 07:30
Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?
Answers: 2
Chemistry, 22.06.2019 10:30
Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?
Answers: 3
Chemistry, 22.06.2019 10:50
An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons
Answers: 2
Commercially available cold packs are simple in design: a pouch with water on one side, isolated by...
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