How are evaporation and condensation alike

Is a corroding metal a chemical and physical change

What is the pH of 0.50 M H2S (given that Ka=8.91 x 10^-8) ? A. 3.7 B. 1.7 C. 6.9 D. 3.6

In cell-level organization, different cells are specialized for different function. True or False?

In an endothermic reaction, the total energy at the beginning of the reaction is what

What two regions make up all atoms

4.05 kg + 567.95 g + 100.1 g add the correct value using the correct sig figs and or least precise degree of precision. When i did least degree of precision i got 4718.

Dinitrogen pentoxide gas is formed by the reaction of nitrogen trioxide gas and nitrogen dioxide gas balanced equation

In an experiment to test a new drug's effectiveness, one group is given a larger dosage than is typically prescribed, and a second group is given a smaller dosage than is typically prescribed.

Waves move out through the ground from the source of an earthquake. True or false

The 14C content of a wooden harpoon handle found in the remains of an Inuit encampment in western Alaska is 61.9% of the 14C content of the same type of wood from a recently cut tree. How old is the harpoon?