Calculate the hydrogen ion concentration of a Nitric acid solution with a pH of 2.11. [H] = (round to 2 decimal places)

In which phase(s) do the molecules take the shape of the container?

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.