Chemistry, 07.07.2019 07:30 danielburke24

The atoms in a sample are close together but can slide past one another. as the atoms lose energy, they move slower. the atoms become locked in place because of attractive forces between themwhich change of state is taking place?

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Answer from: carrie85

Explanation:

As we known that atoms in a liquid substance are closer to each other and they are able to slide past each other because the attractive forces between them are neither too strong or too weak.

Hence, liquid substance are able to take the shape of a vessel in which they are placed. Liquids have a fixed volume but no fixed shape.

On the other hand, atoms of a solid do not have enough kinetic energy. As they are held by strong attractive forces and they only vibrate at their mean position.

Hence, solids have fixed shape and volume.

Thus, we can conclude that in the given situation liquid to solid change of state is taking place.

Answer from: ahoney2233

When they are close together and can slide, it will be in the state of a liquid, which takes a particular volume, but not a form.

When energy is decreased, the atoms move slower, and eventually locked in place, which will give it a fixed form, i.e. a solid.

The change of state is therefore that from a liquid to a solid, i.e. freezing.

Answer from: Quest

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

Answer from: Quest

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