All categories

2 years ago

What does the latent heat of fusion measure?

Chemistry

1 answer:

myrzilka [38]2 years ago

6 0

Answer:

Explanation:

This is the quantity of heat required to raise the temperature of a unit mass of a substance from solid to liquid without change in temperature

You might be interested in

Of five different laboratory solutions, the solution with the highest acidity has a pH of

Dominik [7]

Answer:

Explanation: E. 12 because it has the highest acidity rate.

5 0

2 years ago

Part 1: A cylinder containing 20.0 L of compressed nitrogen is connected to an empty (evacuated) vessel with an unknown volume.

baherus [9]

Answer:

The volume of the vessel is 250 L

Partial pressure of hydrogen = 189 torr

Explanation:

Using Boyle's law

${P_1}\times {V_1}={P_2}\times {V_2}$

Given ,

V₁ = 20.0 L

V₂ = ?

P₁ = 25 atm

P₂ = 2 atm

Using above equation as:

${P_1}\times {V_1}={P_2}\times {V_2}$

${25}\times {20.0}={2}\times {V_2}$

${V_2}=\frac {{25}\times {20.0}}{2}\ L$

${V_2}=250\ L$

<u>The volume of the vessel is 250 L.</u>

According to Dalton's law of partial pressure:-

$P_{H_2}=Mole\ fraction\times Total\ Pressure$

So, according to definition of mole fraction:

$Mole\ fraction\ of\ H_2=\frac {n_{H_2}}{n_{H_2}+n_{He}}$

Also,

Mole fraction of H₂ = 1 - Mole fraction of He = 1 - 0.75 = 0.25

So,

Total pressure = 756 torr

Thus,

$P_{H_2}=0.25\times 756\ torr$

<u>Partial pressure of hydrogen = 189 torr.</u>

7 0

3 years ago

Elements in group 16 want to bond with elements in group ___.

Trava [24]

Answer:

Two

Explanation:

Elements in group 16 wants to bond with elements in group IIA, the group of alkaline earth metals.

The bonding will make it easier for them complete their octet.
Elements in group 16 has 6 valence electrons.
To have a complete octet, they require 2 more electrons.
Group II elements are willing donors as they are metals.
For Group II elements to fill their octets, they must lose two electrons.
So the willingness of group II elements to lose two electrons and the readiness for group 16 elements to gain the electrons makes the desire one another.

5 0

2 years ago

Which is a way that the elements are groupef on the periodic table

hammer [34]

Your answer is B because elements within the same column have equal numbers of valence electrons which determines the reactivity of an element.

8 0

2 years ago

Which force keeps the planets from floating off into space?

lesantik [10]

Answer:

Suns gravity

Explanation: