The atomic number tells you the number of what in one atom of an element?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?