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2 years ago

20 points WILL GIVE BRAINLIEST

Chemistry

1 answer:

Andru [333]2 years ago

3 0

Answer:

The answer is A.

Explanation:

Aristarchus largely underestimated the size of the sun, but he accurately measured the relative size of the earth to the moon

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What are the elements of scientific method?

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Answer:

The basic steps of the scientific method are: 1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis, and 4) draw conclusions and refine the hypothesis.

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3 years ago

Is vinegar a substance or a mixture?

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Vinegar is a mixture cause its composed of water and acetic acid.

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4 years ago

How many moles of glucose are contained in 8.3 x 10^21 molecules of glucose

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Approximitly 0.013787375 moles

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3 years ago

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The solutions that are used in this experiment have alcohols as both the solvent and the reactant. How is the excess alcohol rem

ElenaW [278]

Excess alcohol is removed by Vacuum filtration.

<h3>What is vacuum filtration?</h3>

Vacuum filtration is a methodology where a tension differential is kept up with across the channel medium by clearing the air beneath the channel paper.
Vacuum filtration gives a power on the arrangement notwithstanding that of gravity and builds the pace of filtration.
Vacuum filtration is the standard strategy utilized for isolating a strong fluid blend when the objective is to hold the strong (for instance in crystallization).

<h3>How do you dry a product after vacuum filtration?</h3>

The strong can be dried rapidly by washing the strong with an unpredictable fluid (methanol, CH3)2CO, or ether are normal) that the strong won't break up in. In the event that the filtrate is to be gathered, change the getting jar prior to washing.

To learn more about vacuum filtration from the given link

brainly.com/question/24082009

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2 years ago

Br2(l) + 2Nal(aq) — 12(s) + 2NaBr(aq)

Ganezh [65]

Iodine (I) is oxidized, and bromine (Br) is reduced. The correct option is the last option - lodine (I) is oxidized, and bromine (Br) is reduced.

To determine which elements are oxidized and reduced,

First, we will define the terms Oxidation and Reduction

<em>Oxidation </em>is simply defined as the loss of electrons. It can also be defined as increase in oxidation number.

<em>Reduction </em>is defined as the gain of electrons. It can also be defined as decrease in oxidation number.

The given chemical equation is

Br₂(l) + 2NaI(aq) → I₂(s) + 2NaBr(aq)

Oxidation number of Bromine decreased from 0 to -1.

Therefore, Bromine is reduced.

Oxidation number of Iodine increased from -1 to 0.

Therefore, Iodine is oxidized.

Oxidation number of sodium did not change.

Therefore, Sodium is neither oxidized nor reduced.

Hence, Iodine (I) is oxidized, and bromine (Br) is reduced. The correct option is the last option - lodine (I) is oxidized, and bromine (Br) is reduced.

Learn more here: brainly.com/question/12913997

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3 years ago