The density of a given gas at tower temperature a) increases b) decreases c) sta

Question

The density of a given gas at tower temperature a) increases b) decreases c) stays the same The density of O_2 gas is the density of O_2 gas a) greater than b) less than c) the same as On the Kelvin temperature scale, 40 degree C is: a) - 40 b) 0 c) 233 d) 313 A barometer measures atmospheric: a) density b) pressure c) temperature d) volume Everything else being equal, when the pressure on a gas increases, the volume of the gas: a) increases b) decreases c) stays the same Everything else being equal, when the temperature of a gas increases, the volume of the gas: a) increases b) decreases c) stays of the same Which law would you use to solve this problem? A gas at a temperature of 100 degree C occupies a volume of 1.54 L. What will be the volume of the gas at 10 degree C? (You do not have to solve the problem numerically.) a) Avogadro's Law b) Boyle's Law c) Charles' Law d) Combined Gas Law I pump up the tires on my car in the garage where the temperature is 55 degree F. When I take my car out to the parking lot in winter where it's 15 degree F, will my car tires be a) slightly larger b) slightly smaller c) the same size Which of these is a unit of pressure? a) atm b. calorie c) g d) mm If the value breaks off a cylinder of gas that is not strapped down. a) a toxic gas will get out b) the tank will shoot around like a rocket c) air will contaminate the gas in the tank d) a polymer will form When weather balloon rises to 20 miles above the earth, its size: a) increases b) decreases c) stays the same Which person participated in the discovery of several radioactive elements? a) Bohr b) Curie c) roentgen d) Volta

Explanation / Answer

1)
p*V=n*R*T
p*V=(mass/molar mass)*R*T
p*molar mass=(mass/V)*R*T
p*molar mass=density*R*T

so, if T is lower, density will be higher
Answer: a

2)
p*molar mass=density*R*T

so, greater the molar mass, greater will be the density
Answer: b

3)
T = 40 oC = (40+273) K = 313 K
Answer: d

4)
Answer: b

5)
P*V = constant
increases P will decrease V
Answer: b

I am allowed to answer only 1 question at a time

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