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Lelechka [254]
3 years ago
13

TIMED PLS HELP ASAP AND WILL GIVE BRAINLIST

Chemistry
1 answer:
sleet_krkn [62]3 years ago
5 0

<u>Answer:</u> The theoretical yield of alum is 12.09 g

<u>Explanation:</u>

Molarity is calculated by using the equation:

\text{Molarity}=\frac{\text{Moles}}{\text{Volume}} ......(1)

We are given:  

Molarity of sulfuric acid = 9.9 M

Volume of solution = 8.3 mL = 0.0083 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

\text{Moles of sulfuric acid}=(9.9mol/L\times 0.0083L)=0.08217mol

The given chemical equation follows:

2Al+2KOH+4H_2SO_4+22H_2O\rightarrow 3H_2+2KAl(SO_4)_2.12H_2O

By the stoichiometry of the reaction:

4 moles of sulfuric acid produces 2 moles of alum

So, 0.08217 moles of sulfuric acid will produce = \frac{2}{4}\times 0.08217=0.0411mol of alum

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(2)

Molar mass of alum = 294.24 g/mol

Plugging values in equation 2:

\text{Mass of alum}=(0.0411mol\times 294.24g/mol)=12.09g

Hence, the theoretical yield of alum is 12.09 g

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<h3>Charles' law</h3>

Finally, Charles' law establishes the relationship between the volume and temperature of a gas sample at constant pressure. This law says that the volume is directly proportional to the temperature of the gas. That is, if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.

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<h3>Temperature of the gas in this case</h3>

In this case, you know:

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Learn more about Charles's law:

brainly.com/question/4147359?referrer=searchResults

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In an atom, the number of neutrons determines most specifically the isotopes of an element.

<h2>Further Explanation</h2><h3>An atom  </h3>
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Keywords: Atom, sub-atomic particles, electrons, protons, neutrons, isotopes  

<h3>Learn more about:</h3>
  • Sub-atomic particles: brainly.com/question/12762384
  • Electrons: brainly.com/question/1264222
  • Protons: brainly.com/question/1264222
  • Neutrons: brainly.com/question/1264222
  • Mass number: brainly.com/question/2152789
  • Atomic number: brainly.com/question/8100107

Level: High school

Subject: Chemistry  

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