Which of these choices is the best definition of absolute dating?

Chemistry

1 answer:

skad [1K]2 years ago

4 0

Answer:

I think it's A because the sedimentary rock is also involved in finding the fossils to determine their phenotype and their roots.

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A solution is prepared by mixing 2.88 mol of acetone with 1.45 mol of cyclohexane at 30°C. 2nd attempt Calculate the χacetone an

Volgvan

First c<span>alculate the mole fraction of each substance:
acetone: 2,88 mol </span>÷ (2,88 mol + 1,45 mol) = 0,665.
cyclohexane: 1,45 ÷ (2,88 mol + 1,45 mol) = 0,335.
Raoult's Law:
P(total) = P(acetone) · χ(acetone) + P(cyclohexane) · χ(cyclohexane).
P(total) = 229,5 torr · 0,665 + 97,6 torr · 0,335.
P(total) = 185,3 torr.
χ for acetone: 229,5 torr · 0,665 ÷ 185,3 torr = 0,823.
χ for cyclohexane: 97,6 torr · 0,335 ÷ 185,3 torr = 0,177.

8 0

3 years ago

What do we call the study of weather? A.forcasting B.meteorology

svp [43]

The correct answer is B. meteorology. The study of weather is called meteorology, derived from the Greek word for "of the atmosphere".

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3 years ago

Three of the primary components of air are

Doss [256]

Hey there,

Based on my research and my understanding, your correct answer would be exactly 760 torr. Because if you do <span>Pt = P1 + P2 + P2, that will eventaully give your 760 torr.

~Jurgen</span>

3 0

3 years ago

Determine the molality of an aqueous solution that is 15.5 percent urea by mass.

DaniilM [7]

15.5% by mass is equivalent 15.5 g urea in 100 g solution or 155 g urea in 1 kg solution. <span>

<span>we know that molality = moles solute / kg solvent

<span>moles solute = 155 g / 60 g/mol = 2.58 moles urea

</span></span></span>

Since there are 155 g urea in 1000g solution, hence the solvent is 845 g or 0.845 kg

So:<span>
<span>molality = 2.58 / 0.845 = 3.06 m</span></span>

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3 years ago

The compound iron oxide can exist with either iron(II) ions or iron(III) ions. Conduct Internet research to learn about the diff

melomori [17]

Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.

<h3>What is Iron (II) Oxide ? </h3>

The formula of the Iron II oxide is FeO. Common name of Iron (II) Oxide is Ferrous Oxide. Iron (II) Oxide is a black colored powder. The mineral form of Iron (II) oxide is known as Wustite. Iron (II) Oxide is used as a pigment. It is also used to make dyes.

<h3>What is Iron (III) Oxide ? </h3>

The formula of the Iron (III) Oxide is Fe₂O₃. Common name of Iron (III) Oxide is Ferric oxide. Iron (III) Oxide appears as Red-Brown solid. It is also known as Hematite. Iron (III) oxide is used as pigments. It is used in dental composites , cosmetics. It is also used to apply the final polish on metallic jewellery.

Thus from the above conclusion we can say that Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.

Learn more about the Iron (II) Oxide here: brainly.com/question/14143857
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7 0

2 years ago