What effect will the number of particles and temperature have on the rate of diffusion of gas molecules?
a.
the rate of diffusion decreases with the increase in number of particles and temperature.
b.
the rate of diffusion increases with the increase in number of particles and temperature.
c.
the rate of diffusion increases with the increase in number of particles and decrease in temperature.
d.
the rate of diffusion decreases if the number of particles and temperature are kept constant.
e.
the rate of diffusion increases if the number of particles and temperature are kept constant.

B

Explanation:

Diffusion involves the movement of particles of a gas. They possess a kinetic energy which depends on the temperature of the gas. Increasing the temperature of the gas implies increasing the average kinetic energy of the molecules of the gas. If moregas molecules are present and their kinetic energy is increased by increasing the temperature, the rate of diffusion will definitely increase. Hence the answer.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

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