A strip of magnesium is placed into a test tube with hydrochloric acid to form magnesium chloride and hydrogen. The mass of the reactants is measure to be 12g. After the reaction is complete, the mass of the system is 11.8g. Knowing the Law of the Conservation of Mass, what happened to the rest of the mass?

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explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

i dont know the answe

answerca air mass;