Which event would be impossible to explain by using John Dalton's model of the atom? O An iron atom emits particles when it is struck by light.
O An oxygen atom combines with two hydrogen atoms to form water.
O An acid reacts with a base to form salt and water.
O The atoms in sodium metal react with water.

Option A

Explanation: an iron atom emits particles when its struck by light.

The answer is A

Explanation:

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specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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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 :