Question

the density of liquid mercury is 13.6 gram centimetre cube how many moles of Mercury are there in 1 litre of the metal

Answer 1

it's answer is
$0.0676mol$

Answer 2

Answer:

68 moles

Explanation

Mass of mercury(Hg) in grams=density(g cm^-3)×volume(cm^3)

=13.6 g cm^-3×1000 cm^3

=136000g

Number of moles of mercury=

$mass \: of \: mercury \: in \: grams \div gram atomic \: mass \: of \: mercury$

$13600 \div 200g$

$68 \: mole$

More info. about mole

A mole is defined as the amount of a substance that contains as many atoms,molecules,iron,electrons or other elementary particles

For example:The molecular mass of ammonia is 17.031.Therefore,the mass of 1 mol of ammonia is 17.031 g