Mercury(ii) oxide (hgo) decomposes to form mercury (hg) and oxygen (o2). the balanced chemical equation is shown below.

2hgo 2hg + o2

the molar mass of hgo is 216.59 g/mol. the molar mass of o2 is 32.00 g/mol. how many moles of hgo are needed to produce 250.0 g of o2?
3.906
7.813
15.63
73.87

15.63 moles of HgO are needed to produce 250.0 g of

Explanation:

According to given balanced equation, 1 mole of is produced from 2 moles of HgO.

Number of moles

So 250 g of

So moles of HgO needed

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

elements make up everything, and they combine to make compounds.

the answer is c