Cuantos gramos de oxigeno hay en 79 moles de oxigeno?

how many grams of oxygen are there in 79 moles of oxygen?

1264g

Explanation:

Given parameters:

Number of moles of oxygen = 79moles

Unknown:

Mass in grams of oxygen  = ?

Solution:

To find the mass, we simply use the expression below;

          Mass of Oxygen  = number of moles x molar mass

Molar mass of Oxygen  = 16g/mol

  Insert the parameters and solve;

         Mass of Oxygen  = 79 x 16  = 1264g

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :