Answer:
energy released by a reaction is gained by the surroundings.
Explanation:
umm... I'm not 100% sure about this
Just use a solubility chart! Find the cation on the far left and the anion on the top and find where they connect. If it says "s," it is not soluble. If it says "aq," it is soluble. Here, ZnF (Zinc Fluoride) is soluble. Hope that helps! :)
P.S. Not all of the compounds above are on this particular chart. In future problems, just google "solubility chart" until you find one with all of the compounds you need to look at.
Answer:
B. The transition of heat across matter
A. True
They are formed behind an obstacle when the wind blows the sand up to it.
I might need a diagram for this, but I have a vague idea of what you are talking about.
If H20 is going left it means the temperature is going lower.
The molecules will condense to slowly become ice