Carbon monoxide at a pressure of 1490 mmhg reacts completely with o2 at a pressure of 745 mmhg in a sealed vessel to produce co2. what is the final pressure in the flask?

Answer : The final pressure in the flask is, 2235 mmHg

Explanation :

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

where,

= total pressure = ?

= partial pressure of = 1490 mmHg

= partial pressure of = 745 mmHg

Now put all the given values is expression, we get the total pressure in the flask.

Therefore, the final pressure in the flask is, 2235 mmHg

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 ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.