When the reddish-brown mercury(ii) oxide (hgo) is heated, it decomposes to its elements, liquid mercury metal and oxygen gas. if 1.19 g hgo is decomposed to hg, calculate the mass of the pure hg metal produced. 2 hgo(s) 2 hg(l) + o2(g)?

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04-04-2018
Chemistry

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When the reddish-brown mercury(ii) oxide (hgo) is heated, it decomposes to its elements, liquid mercury metal and oxygen gas. if 1.19 g hgo is decomposed to hg, calculate the mass of the pure hg metal produced. 2 hgo(s) 2 hg(l) + o2(g)?

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kenmyna kenmyna · Answer 1 · 2018-04-14T20:06:34+02:00

kenmyna kenmyna

14-04-2018

2HgO-----> 2Hg + O2

find the moles of HgO,

moles=mass/molar mass

1.19g/216.59(molar mass of HgO) = 5.49 x10^-3moles

by use of mole ratio between HgO and Hg which is 2:2 or 1:1 the moles of Hg is also 5.49 x10^-3 moles

mass of Hg is therefore = (5.49 x10^-3) x 200.59 = 1.101 grams

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