How many moles of NaCl need to be dissolved in 2.50 L of water to create a 0.750 M solution of NaCl?

Which of the following statements is true about planck’s law

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

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same