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Ainat [17]
3 years ago
15

Why is it necessary to find the percent yield of a reaction? A. to determine the efficiency of the reaction B. to determine the

amount of reactants in the reaction C. to determine the amount of products in the reaction D. to determine the limiting reactant of the reaction
Chemistry
1 answer:
ANTONII [103]3 years ago
4 0

Answer:

A. to determine the efficiency of the reaction

Explanation:

  • Percentage is the ratio of the actual yield to theoretical yield as a percentage. It is calculated by dividing the actual yield by theoretical yield then multiplying by 100%.
  • Calculation of percentage yield is important as it helps in the determination of efficiency of a reaction. For example in most industries for the purpose of making the most product with the least waste.
  • Additionally, calculating the percentage yield helps in determining other products that may be formed during the reactions.
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Explanation:

I hope it'll help you.

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Answer:

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3 years ago
When methanol, CH 3 OH , is burned in the presence of oxygen gas, O 2 , a large amount of heat energy is released. For this reas
luda_lava [24]

<u>Answer:</u> The mass of methanol that must be burned is 24.34 grams

<u>Explanation:</u>

We are given:

Amount of heat produced = 581 kJ

For the given chemical equation:

CH_3OH(g)+\frac{3}{2}O_2(g)\rightarrow CO_2(g)+2H_2O(l);\Delta H=-764kJ

By Stoichiometry of the reaction:

When 764 kJ of heat is produced, the amount of methanol reacted is 1 mole

So, when 581 kJ of heat will be produced, the amount of methanol reacted will be = \frac{1}{764}\times 581=0.7605mol

To calculate mass for given number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Moles of methanol = 0.7605 moles

Molar mass of methanol = 32 g/mol

Putting values in above equation, we get:

0.7605mol=\frac{\text{Mass of methanol}}{32g/mol}\\\\\text{Mass of methanol}=(0.7605mol\times 32g/mol)=24.34g

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4 0
3 years ago
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The answer is C, because the moon does rotate it just rotates at the perfect time for us to never side the other side of it.  
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2 years ago
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A sample of the amino acid tyrosine is barely soluble in water. Would a peptide containing only a string of Tyr residues be more
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Answer:

Tyrosine is a polar and aromatic compound. its side chain acidity and basicity is neutral

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