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soldi70 [24.7K]
3 years ago
12

I need help with this please: How much energy would be required to vaporize 45.0 grams of water?

Chemistry
1 answer:
Darya [45]3 years ago
4 0

Answer:

The answer is 116 kJ

Explanation:

If right Branliest?

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What is the name of this molecule?<br><br> H3C - C ≡ C - CH3<br><br> Answer: 1,2,3, or 4-butyne?
Semenov [28]

Explanation:

The given molecule is

H3C - C ≡ C - CH3

The numbering order is shown below:

H3C - C ≡ C - CH3

    1     2     3     4

So, the alkyne group is in the second position.

The carbon chain has four carbons.

Hence, the IUPAC name of the given compound is:

2-butyne.

8 0
3 years ago
In a recent study, 50 males used a new weight-loss supplement, and 37 of them experienced weight loss after two weeks: In the sa
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<em>Answer:</em>

The new weight-loss supplement was less effective on females in the study. That is because only 65% of them lost weight after two weeks, whereas 74% of the males lost weight after two weeks.

<em>Explanation:</em>

37 out of 50 males lost weight after two weeks, so 74% of males lost weight ( (37 · 2)/(50 · 2) ). 13 out of 20 females lost weight after two weeks, so 65% of females lost weight ( (13 · 5)/(20 · 5) ). This means the supplement was less effective on females because males had a higher percentage of losing weight.

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7 0
2 years ago
The graph shows the amount of a gaseous product formed over time during two trials of a reaction. A different concentration of a
makkiz [27]

Trial 1 has a lower concentration of the reactant because the  because the average rate of the reaction is lower.

<h3>What is a reaction?</h3>

The term reaction has to do with the combination of reactants in order to yield products. Now we know that the reaction profile is used to show the interaction that exists between the reactants and the products.

The y-axis of the graph is for the amount while the x axis of the graph is the reaction time. The rate of reaction is the time taken for a given amount of products to appear or for a given amount of reactants to disappear.

Thus, from the graph, we can see that trial 1 has a lower concentration of the reactant because the  because the average rate of the reaction is lower.

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5 0
2 years ago
Hard water stains in sinks and showers can be caused by a buildup of solid calcium carbonate. These stains can be removed by bat
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Answer:

CaCO3 + 2HCl ---> CaCl2 + H2O + CO2

Explanation:

The reaction between solid calcium carbonate and a mineral acid such as aqueous HCl is a neutralization reaction and occurs with the evolution of CO2 gas.

The balanced equation is given below

CaCO3 + 2HCl ---> CaCl2 + H20 + CO2

The product CaCl2 is water soluble which accounts for why the stain is removed, while CO2 gas escapes away from the reaction surface.

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3 years ago
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