3.00 moles of nitrogen and 4.00 moles of oxygen are placed in a 35.0 l container at a temperature of 298 k. what is the pressure of the resulting mixture of gases?
a. 345 kpa
b. 395 kpa
c. 445 kpa
d. 495 kpa

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

The biosphere of the earth is made up of what compound? organic or inorganic?

While in europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car’s gas mileage is 32.0 mi/gal? assume that 1 euro=1.26 dollars