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LuckyWell [14K]
2 years ago
13

An oven-cleaning solution is 40.0% (by mass) NaOH.

Chemistry
1 answer:
Juliette [100K]2 years ago
8 0

The amount of NaOH by mass the jar contains will be 183.2 g

<h3>Percent composition</h3>

The percent by mass of NaOH in the oven-cleaning solution is 40.0%.

This means that for every 100 g of the cleaning solution, there would be 40 g of NaOH.

Now, the jar in question contains 458 g of this solution which is 40.0% NaOH by mass.

The amount of NaOH in the jar can be calculated as:

             40/100 x 458 = 183.2 g

This means that 458 g of the oven-cleaning solution that is present in the jar contains 183.2 g of NaOH.

More on percent composition can be found here: brainly.com/question/17505281

#SPJ1

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Polymerization

Explanation:

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Monomers are small molecules that are joined to form polymers.

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3 years ago
Is 70 degree hot or cold
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In the chemical reaction NaHCO3 + CH3COOH → CH3COONa + H2O +CO2, 83 g of sodium bicarbonate reacts with 70 g of acetic acid. Whi
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83g NaHCO₃ react with...........

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We used 70g CH₃COOH, it' too much.
So, acetic acid is excess reagent, and sodium bicarbonate is limiting reagent.
_______________________________
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4 years ago
A serving of fish contains 50 g of protein and 4 g of fat . if protein has a caloric value of 4.0kcal/g and fat has 9.1 kcal/g ,
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Answer:

2.4x10² kcal

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As the serving of fish contains 50g of protein that is 4.0kcal/g:

50g × (4.0kcal/g) = <em>200kcal</em>

<em> </em>

And in 4g of fat that is 9.1kcal/g:

4g × (9.1kcal/g) = <em>36.4kcal</em>

<em />

That means the kcal of the serving are:

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In 2 significant figures: <em>2.4x10² kcal</em>

<em></em>

I hope it helps!

<em />

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