new qu question 3 2. THow would not allowing the erucible to cool to room temper

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question 3

2. THow would not allowing the erucible to cool to room temperature before weighing the product aflect the outcome of the experiment? Will the reported Mg to O mole ration be high or low? Explainyouranswer. room ooreve befowsching Colo ledo room iomprete defore weghig h crcbe Could be less becoute he nal current on the k,alance Gnotf obl(nat 'maer demoero cuovt be /oaer Hon a Cvob Democrius told his TA that the molecular formaula of magnesium oside is threetimes Democritus told his TA that the molecular formula of magnesium oxide is three times the empirical formula. Is he correct? Show how you arrived at your answer 4. How would spilling some of the product from the crucible affect the outcome of the experiment? Would the Mg to O mole ratio be higher or lower than expected? the wel t or the

Explanation / Answer

Answer: He is wrong

Mg has valency of 2 and it forms Mg+2

O has valency of 2 and it forms O2-

They both combine to form molecule MgO

Molecular formula is MgO

Empirical formula is simlest ratio of Mg and O.Since they arealready in ratio of 1:1.

Its empirical formula is also MgO

So both emperical formula and molecular formula of MgO is same

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