Based on their locations on the periodic table, which best compares the properties of the metalloids arsenic (As) and antimony (
1 answer:
You might be interested in
Explanation:
It is known that heat (Q) required to change the phase of a given sample of mass m will be as follows.
........ (1)
where, = latent heat of fusion
Similarly, = mL_{v}[/tex] ....... (2)
where, = latent heat of vaporization
As it is known that value of latent heat of fusion of water is 334 J/g and latent heat of vaporization of water is 2260 J/g.
Hence, equating both the equations as follows.
=
=
=
= 54.13 g
Hence, we can conclude that 54.13 grams of ice will melt.
Answer: norfenefrine
Explanation:
Depression in freezing point is given by:
= Depression in freezing point
i= vant hoff factor = 1 (for non electrolyte)
= freezing point constant =
m= molality
Weight of solvent (ethanol)=
Molar mass of unknown non electrolyte = M g/mol
Mass of unknown non electrolyte added = 82 mg = 0.082 g (1g=1000mg)
The molecular mass of norfenefrine is near to 154 and thus the identity of the white powder is norfenefrine .