The hormone epinephrine is released in the human body during stress and increases the body's metabolic rate. Epinephrine, like m
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Answer:
Theoretical yield = 13.7 g
% yield =76 %
Explanation:
For
Mass of = 4.07 g
Molar mass of = 101.96 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the reaction:
1 mole of on reaction produces 1 mole of
So,
0.0399 mole of on reaction produces 0.0399 mole of
Moles of obtained = 0.0399 mole
Molar mass of = 342.2 g/mol
The formula for the calculation of moles is shown below:
Thus,
<u>Theoretical yield = 13.7 g</u>
The expression for the calculation of the percentage yield for a chemical reaction is shown below as:-
Given , Values from the question:-
Theoretical yield = 13.7 g
Experimental yield = 10.4 g
Applying the values in the above expression as:-
<u>% yield =76 %</u>
Answer:
The answer is
<h2>2.7 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
From the question
mass of aluminum = 40.5 g
volume = 15 mL
Substitute the values into the above formula and solve for the density
We have
We have the final answer as
<h3>2.7 g/mL</h3>Hope this helps you
Answer:
9.47 mL
Explanation:
The reaction that takes place is:
- 2KOH + H₂SO₄ → K₂SO₄ + 2H₂O
First we <u>calculate how many KOH moles reacted</u>, using <em>the given concentration and volume of KOH solution</em>:
- 0.061 mol/L = 0.061 mmol/mL
- 0.061 mmol/mL * 26.7 mL = 1.6287 mmol KOH
Then we <u>convert KOH moles into H₂SO₄ moles</u>, using the <em>stoichiometric coefficients</em>:
- 1.6287 mmol KOH *
= 0.8144 mmol H₂SO₄
Finally we <u>calculate the required volume of the H₂SO₄ solution</u>, using<em> the number of moles and given concentration</em>:
- 0.8144 mmol ÷ 0.086 mmol/mL = 9.47 mL