The process by which water vapor changes to liquid water is called
a. freezing.
b. melting.
c. condensation.
d. evaporation

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

If two objects at different te,peraure are in contact with each other what happens to their temperature

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o