An oxygen gas container has a volume of 20.0 l. how many grams of oxygen are in the container if the gas has a pressure of 883 mmhg at 24 ∘c? express your answer to three significant figures and include the appropriate units.

Answer : The mass of oxygen gas will be, 30.5 grams

Solution :

Using ideal gas equation,

where,

n = number of moles of gas

w = mass of gas  = ?

P = pressure of the gas =

conversion used : (1 atm = 760 mmHg)

T = temperature of the gas =

M = molar mass of oxygen gas = 32 g/mole

R = gas constant = 0.0821 Latm/moleK

V = volume of gas = 20.0 L

Now put all the given values in the above equation, we get the mass of oxygen gas.

Therefore, the mass of oxygen gas will be, 30.5 grams

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.

the answer is either b or c