When you heat a 50.0 L cylinder containing 10.0 moles of oxygen to 333 K, what is the pressure inside? Use the ideal gas law PV = nRT with R = 8.31 L-kPa/mol-K.

A. 166 kPa
B. 5.46 kPa
C. 12.5 kPa
D. 553 kPa

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