0.091 moles are contained in 2.0 L of N2 at standard temperature and pressure.
Explanation:
Data given:
volume of the nitrogen gas = 2 litres
Standard temperature = 273 K
Standard pressure = 1 atm
number of moles =?
R (gas constant) = 0.08201 L atm/mole K
Assuming nitrogen to be an ideal gas at STP, we will use Ideal Gas law
PV = nRT
rearranging the equation to calculate number of moles:
PV = nRT
n =
putting the values in the equation:
n =
n = 0.091 moles
0.091 moles of nitrogen gas is contained in a container at STP.
It creates oxygen which every living thing needs to live. i hope this helps! :)
Scientific investigations that involve some kind of testing will make use of observations. Generally speaking, making observations is the first step of the scientific method. Based on those observations, a question is asked, and then a hypothesis and prediction will be stated. A scientist will set up a test, observe the outcome, and collect data on the test. That will lead the scientist to some kind of conclusion relating to the initial question and hypothesis....