What is the true mass of water weighed at 24°c in the air if the apparent mass is 1.0346 ± 0.0002 g? the density of air is 0.0012 ± 0.0001 g/ml and the density of balance weights is 8.0 ± 0.5 g/ml. the uncertainty in the density of water is negligible in comparison to the uncertainty in the density of air.

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.

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 :

points

explanation:

answer; 4 electrons;