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3 years ago

Under what conditions are two atoms different isotopes of the same element

Chemistry

1 answer:

Aloiza [94]3 years ago

8 0

<span>the number of neutrons they have</span>

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What substance can act as catalysts in the body?

pickupchik [31]

Answer:

Enzymes

Explanation:

Enzymes are proteins that can act as catalysts in the body.

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2 years ago

If one benzene molecule is placed in water, the total entropy of the water + benzene system:___________

valkas [14]

Answer:

d) increases

Explanation:

Benzene is an aromatic hydrocarbon which is obtained from the destructive distillation of coal. It is a colourless volatile liquid with a sweet smell. It boils ar 80° C (353 K) and freezes at 5°C (2278 K). It is insoluble in water but mixes in all proportions with ethanol, ethoxyethane and methylbenzene. The reason which benzene is insoluble in water is that benzene is a non-polar compound and water is polar, meanwhile only "like dissolves like". So, when the benzene molecule is placed in water. There will be distortion and disturbance between the benzene molecule and the water. Thus, the particle of each molecule will be distant from each other. This state results to change in the entropy of the system as the entropy of the system increases.

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2 years ago

How many atoms of manganese are in 1.00 g?

andriy [413]

Answer:

$\frac{1.00g}{54.9g. {mol}^{ - 1} } = 0.0182\: mol\\ \\ 6.023 \times {10}^{23} \times 0.0182 \: mol \\ = 0.109\times {10}^{23} \: atoms$

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2 years ago

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Hello I need help very bad!!!

Oksanka [162]

D. Cell membrane: surrounds a cell and allows substances to pass in and out

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3 years ago

What letter on the model titration curve corresponds to the point where ph equals the numerical value of pka for hpr? what speci

irakobra [83]

Letter C on the model titration curve corresponds to the point where pH equals the numerical value of pKa for HPr

<h3>What is a titration curve?</h3>

A titration curve is a graph of the pH of a solution against increasing volumes of an acid or a base that is added to the solution.

The pH of a solution is the negative logarithm to base ten of the hydrogen ion concentration and is a measure of the acidity or alkalinity of the solution.

The pKa is the acid dissociation constant of an acid solution.

In a titration of a strong acid and strong base, the pH at equivalence point is equal to the pKa of the acid.

The equivalence point is the point when equal moles of acids and base has reacted.

In the given titration curve, pH = pKa at point C.

In conclusion, for a titration curve of strong acid and base, at equivalence point, pH is equal to pKa of acid.

Learn more about equivalence point at: brainly.com/question/23502649

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2 years ago