Convert the following pressures to pressure in standard atmosphere 151.98 kPa 456 torr

Kpa to atm = 1.5 atm

torr to atm = 0.6 atm

Explanation:

Atmospheric pressure:

It is the pressure exerted by atmosphere at a sea level with the means value of 101.325 pascal.

It is also known as barometric pressure.

It is denoted as "atm"

The value of standard atmospheric pressure is 1.

Kpa to atm:

To convert the kilopascal into atm we would divide the given value by 101.

151.98 kpa × 1 atm /101.325 kpa

1.5 atm

torr to atm:

To convert the torr into atm we would divide the given value by 760.

456 torr  × 1 atm /760 torr

0.6 atm

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