The great French chemist Antoine Lavoisier discovered the Law of Conservation of
ID: 693902 • Letter: T
Question
The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this Lavoisier found that mercury(t) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. experiment chemical equation, including p I state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous 2. Suppose 46.0 mL of dioxygen gas are produced by this reaction, at a temperature of 100.0 °C and pressure of exactly 1 atm. Calculate the mass of mercuryfII) oxide that must have reacted. Round your answer to 3 significant digits. 02 O Type here to searchExplanation / Answer
1. 2HgO(s) ---> 2Hg(l) + O2(g)
2. volume of o2 gas = nRT/P
46*10^-3 = n*0.0821*(273.15+100)/(1)
n = no of mol of o2 gas = 0.0015 mol
2 mol HgO = 1 MOL o2
NO of mol of HgO REQUIRED = 2*0.0015 = 0.003 mol
mass of HgO REQUIRED = 0.003*216.6 = 0.650 grams
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