Answer:
Density, solubility, melting point, boiling point, polarity, etc.
Density - Mass divided by volume = density (scale and beaker can be used)
Boiling point- Can be determined by the capillary method (where an inverted capillary is put in the liquid you’re finding out for and the liquid is heated)
3.00097 x 
atoms are contained in 100.0 g of mercury.
<h3>What is moles?</h3>
The mole is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 12 g of carbon-12.”
Number of moles of mercury = 
Number of moles of mercury = 
= 0.4985 moles
Number of moles of mercury = Number of atoms = moles of Hg x 
= 0.4985 x
= 3.00097 x atoms.
Hence, 3.00097 x atoms are contained in 100.0 g of mercury.
Learn more about the moles here:
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Answer:
C. 101.2 L
Explanation:
N2 + H2= NH3
Balancing it,
N2 + 3 H2 = 2.NH3
(1 mol) (3 mol) (2 mol)
which means
1 molecule of nitrogen reacts with 3 molecule of hydrogen to form ammonia.
Likewise,
50.6 l of nitrogen reacts with 50.6 × 3= 151.8 l of hydrogrn to form 50.6 × 2= 101.2 l of ammonia.
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