All categories

3 years ago

PLEASE HELP FAST!! How much energy (in calories) is need to melt 3.0 moles of ice?

Chemistry

1 answer:

Viktor [21]3 years ago

4 0

Answer:

Energy

Explanation:

The heat required to change the phase of a substance is given by the equation:

Q= mL (Q= Heat required, m= mass, L= Latent Heat of Fusion/Evaporation/Anything else).

So, according to your values:

Q= 3.0 kg x 333 kJ/Kg

So, Q= 999 kJ

You might be interested in

A volcano violently erupts near a small town and wildlife preserve. Which effect might occur? Some local species develop new ada

NemiM [27]

Answer:

Ash and dust fill the air and reduce sunlight.

Explanation:

Ash and dust comes out of volcanoes, and it is bad for the environment. Polluting the air and causing fogginess, it also reduces sunlight.

3 0

4 years ago

Read 2 more answers

Using the periodic tables, identify the heaviest member of each of the following groups:

Lady_Fox [76]

Answer:

(a) Alkali metals: Francium (Fr)

(b) Chalcogens: Polonium (Po)

(c) Noble gases: Radon (Rn)

(d) Alkaline earth metals: Radium (Ra)

Explanation:

In the periodic table, the atomic mass increases down the group. Therefore, the last element of a group is the heaviest element of the group.

(a) alkali metals: The chemical elements that are present in group 1 of the periodic table, except hydrogen.

The heaviest member of this group is francium (Fr)

(b) chalcogens: The chemical elements that are present in group 16 of the periodic table

The heaviest member of this group is polonium (Po)

(c) noble gases: The chemical elements that are present in group 18 of the periodic table

The heaviest member of this group is radon (Rn)

(d) alkaline earth metals: The chemical elements that are present in group 2 of the periodic table.

The heaviest member of this group is radium (Ra)

7 0

4 years ago

Sugar when dissolved into water, propose whether the compound forms atoms, molecules or lattices. Justify you answer

kirza4 [7]

Answer:

atoms

Explanation:

for sugar to dissolve in water hydaration must be equal to or greater than the lattice energy or molecular forces so when the molecular forces breaks new atoms are formed for recombination in new compound

6 0

3 years ago

Which statement is correct about the conclusions of historical events? A) Historical event conclusions can be tested using the s

BARSIC [14]

C is the correct answer I believe

4 0

3 years ago

Read 2 more answers

Scientists have discovered how to use electricity to power cars. Running cars on electricity could help

Fiesta28 [93]

Running cars on electricity would conserve gasoline because electric cars do not use the same resources.

Hope this helps!

8 0

3 years ago

Read 2 more answers