Which of the following is true regarding phase changes?
a. condensation is the reverse of evaporation.
b. melting is the reverse of deposition.
c. freezing is the same as sublimation.
d. sublimation is the same as boiling.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as