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.
To test for hydrogen, burn a candle near the suspected source of hydrogen. If you hear a squeaky pop sound, hydrogen is present because when hydrogen gas burns, it makes a squeaky pop sound.
A positively charged nucleus with two protons and two neutrons hope this helps :)
<span>m1v1=m2v2
m2=(m1v1)/v2
Where m is the molarities and v is the volumes
m2=(0.500*25.0)/48.5
m2=12.5/48.5
m2=0.256 M
so it will be A: 0.256 M</span>