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pishuonlain [190]
3 years ago
6

The troposphere is warmed by the _____.

Chemistry
1 answer:
Lana71 [14]3 years ago
8 0
The correct answer to the question stated above is the third option which is: <span>radiated heat from the Earth's surface.</span>
The troposphere<span> is the lowest layer of Earth's atmosphere.</span>
The troposphere is heated<span> from below. Sunlight warms the ground or ocean, which in turn radiates the heat into the air right above it.
</span>Therefore, the troposphere is warmed by the radiated heat from the Earth's surface.
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HS- is amphoteric; it can behave as either an acid or a base.
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Answer:

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Sphinxa [80]
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3 years ago
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What is the mole fraction of NaOH in an aqueous solution that
astraxan [27]

Answer:

The mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

Explanation:

We are given that

Aqueous solution that contains 22.9% NaOH by mass means

22.9 g NaOH in 100 g solution.

Mass of NaOH(WB)=22.9 g

Mass of water =100-22.9=77.1

Na=23

O=16

H=1.01

Molar mass of NaOH(MB)=23+16+1.01=40.01

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

Using the formula

Number of moles of  NaOH(n_B)=\frac{W_B}{M_B}=\frac{22.9}{40.01}

n_B=0.572moles

Molar mass of water=16+2(1.01)=18.02g

Number of moles of water(n_A)=\frac{77.1}{18.02}

n_A=4.279 moles

Now, mole fraction of NaOH

=\frac{n_B}{n_B+n_A}

=\frac{4.279}{0.572+4.279}

=0.882

Hence, the mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

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3 years ago
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icang [17]
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3 years ago
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