3 years ago

What does the law of conservation of energy state?

Chemistry

1 answer:

Anarel [89]3 years ago

4 0

Answer:

it states that the total mass of the products are the same as the total mass of the reactants in a chemical reaction.

Explanation:

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interactions between substances can produce chemical or physical changes which of the following describes a chemical change

4vir4ik [10]

Reaction that affects the original chemical fomula

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3 years ago

Louis Pasteur developed the germ theory of disease, which states that many diseases are caused by microorganisms. Had scientists

san4es73 [151]

The correct answer is it would not have become scientific consensus.

This way, it became the consensus that later led to many amazing treatments and inventions that cured many diseases.

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4 years ago

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Which of these gaseous elements is LEAST reactive?

Natali [406]

Answer:

helium

Explanation:

it has 8 valence electrons which fills its outer energy level making it have a stable arrangement of electrons hence least reactive

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3 years ago

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A solution contains 4.08 g of chloroform (CHCl3) and 9.29 g of acetone (CH3COCH3). The vapor pressures at 35 ∘C of pure chlorofo

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Explanation:

Below is an attachment containing the solution.

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3 years ago

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Ibuprofen is a drug used to manage mild pain, fever, and inflammation. It is a chiral drug, and only the S enantiomer, whose spe

madam [21]

Answer:

Specific Rotation = 105º

S% in mixture = 92%

Explanation:

Specific rotation in organic compounds varies linearly, then the enantiomeric excess can be express as:

$e.e. = \frac{\alpha }{\alpha pure}$

Where alpha is the specific rotation of the mixture and alpha pure is the specific rotation of the excess enantiomer.

Then, knowing that the S enantiomer is in excess you can calculate the specific rotation of that mixture:

$84=\frac{\alpha }{125.0}*100$

$\alpha =105 Degrees$

For calculating the percentage of S you should remember that the enantiometric excess is the percentage of excess of a certain enantiomer, for example in this case:

$84 = S-R$

Since S is in Excess

Also, it is true:

$100=S+R$

Then you can solve the system of linear equations, finding:

$8=R\\92=S$

Hope it helps!

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3 years ago