The temperature and number of moles of a gas are held constant. Which of the following is true for the pressure of the gas?

a. It is inversely proportional to the volume of the gas.

b. It is directly proportional to the volume of the gas

c. it is inversely proportional to the mass of the gas

d. It is equal to the mass of the gas

i can ! i just need to know what the paragraph is! : p

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

the volume increases

the answer is minerals.