A student is told the barometric pressure is known to be 1.04 atm. In her experiment she collects hydrogen gas in a graduated cylinder as described in this experiment. She finds the water level in the graduated cylinder to be 4.5 cm above the surrounding water bath. What is the total pressure inside the graduated cylinder in torr?

dip it in water

Explanation: dip it in water

answer

the ions in solute supperate from eachouthere

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