The relative atomic mass of chlorine is 35.5. When calculating relative atomic mass, which particle is the mass of a chlorine atom compared
to?
А
a neutron
B
a proton
С
an atom of carbon-12
D
an atom of hydrogen-1

Explanation:

The A r values also allow you to work out that three oxygen atoms have the same mass as two magnesium atoms. Chlorine's A r of 35.5 is an average of the masses of the different isotopes of chlorine.

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A r values of elements.

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 :

the dependant variable is spilled water

the independent is the heat