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natima [27]
3 years ago
15

Walter was heating some cubes of ice while conducting an experiment. At one point, the ice melted into water. What is the correc

t term used to describe the amount of heat required to prompt a phase change?
Chemistry
2 answers:
tatiyna3 years ago
7 0
This would be the Melting point because it is showing that at a certain heat it melts so therefore it is the point it melts and therefore called the melting point
Burka [1]3 years ago
7 0

Explanation:

At atmospheric pressure the amount of heat energy released or absorbed by a solid when it changes from solid state to liquid state at its melting point is known as latent heat of fusion.

For example, latent heat of fusion of water is 79.72 cal/g, that is, when water changes from ice to liquid state then heat released is 79.72 cal/g.

Hence, we can conclude that the correct term used to describe the amount of heat required to prompt a phase change is latent heat of fusion.

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Level 1: 2Sr + 02 &gt; 2Sro
tekilochka [14]

Answer:

Sr would be the limiting reactant

5 moles

Explanation:

Since the equation is a balanced equation, the coefficient shows how each substance relates to the other in terms of the number of moles.

Reactants would be those on the left hand side of the arrow, while the products would be found on te right and side of the arrow. In this question, the reactants would be Sr and O₂.

Limiting reactant is the reactant that is insufficient; meaning to say that there is not enough of that substance and thus the reaction cannot continue. The other reactant(s) that is not limiting is called the excess reactants.

From the balanced equation, 2 moles of Sr is needed to react with 1 mole of O₂. Thus, if we have 5 moles of each reactant, Sr would be the limiting reactant since for every 1 mole of O₂, there has to be 2 moles of Sr in order for the reaction to proceed. Thus, if we have 5 moles of O₂, we would need 10 moles of Sr.

When we work out the amount of products formed, we look at the number of moles of the limiting reactant. This is because the limiting reactant determines how much is being reacted, while the excess number of moles of the excess reactant will remain unreacted.

For every 2 moles of Sr reacted, 2 moles of SrO would be produced. This means that the mole ratio of Sr to SrO is 1:1. Thus, since 5 moles of Sr has been reacted, 5 moles of the product (SrO) would be produced.

8 0
2 years ago
Find the density of an object that has a mass of 28 grams and a volume of 2 points<br> 38.6 cm^3. *
Shtirlitz [24]

Answer:

<h2>0.73 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{28}{38.6}  \\  =0.72538...

We have the final answer as

<h3>0.73 g/cm³</h3>

Hope this helps you

4 0
2 years ago
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