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Mila [183]
3 years ago
12

Maple has a sample of graphite, which is made up of carbon atoms. She has 1.810 x 1024 atoms of carbon. What is the mass of this

sample?
Chemistry
2 answers:
Lera25 [3.4K]3 years ago
4 0

Answer:

  about 36.10 g

Explanation:

The proportion of interest is ...

  mass/atoms = x/(1.810·10^24) = (12.0107 g)/(6.02214076·10^23)

Multiplying by 1.810·10^24, we find the mass of the sample to be ...

  x = 36.0991 g

The mass of the sample is about 36.10 grams (to 4 s.f.).

zysi [14]3 years ago
3 0

Answer:

<h2> <u>about</u><u> </u><u>3</u><u>6</u><u>.</u><u>1</u><u>0</u><u> </u><u>g</u></h2>

  • <em>the</em><em> </em><em>mass</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>given</em><em> </em><em>maple</em><em> </em><em>which</em><em> </em><em>she</em><em> </em><em>has</em><em> </em><em>1</em><em>.</em><em>8</em><em>1</em><em>0</em><em>×</em><em>1</em><em>0</em><em>2</em><em>5</em><em> </em><em>atoms</em><em> </em><em>of</em><em> </em><em>carbon</em><em> </em><em>is</em><em> </em><em>equal</em><em> </em><em>of</em><em> </em><em><u>about</u></em><em><u> </u></em><em><u>3</u></em><em><u>6</u></em><em><u>.</u></em><em><u>1</u></em><em><u>0</u></em><em><u> </u></em><em><u>G</u></em><em><u>/</u></em><em><u>grams</u></em><em><u>.</u></em>
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How many liters of 0.37 M solution can be made with 29.53 grams of lithium fluoride.<br> (LiF)?
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Answer:

V = 3.1 L      

Explanation:

Given data:

Molarity of solution = 0.37 M

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Volume of solution = ?

Solution:

Number of moles of LiF:

Number of moles = mass/molar mass

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Number of moles = 1.14 mol

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9.2

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Let's do an equilibrium chart of this reaction:

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4.9 atm    5.1 atm    0       Initial

-2x             -x           +2x    Reacts (stoichiometry is 2:1:2)

4.9-2x      5.1-x        2x      Equilibrium

The mole fraction of NO₂ (y) can be calculated by the Raoult's law, that states that the mole fraction is the partial pressure divided by the total pressure:

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2x = 5.2 -0.52x

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Thus, the pressure equilibrium constant Kp is:

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