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Nady [450]
2 years ago
6

Елементите от IА и IIА групи на Периодичната система

Chemistry
1 answer:
sergiy2304 [10]2 years ago
5 0
Yes yes you are totally right
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A solution is prepared by mixing 25.0 g H2O and 25.0 g C2H5OH. Determine the mole fractions of each substance.
Veronika [31]

Answer:

Mole fraction H₂O → 0.72

Mole fraction C₂H₅OH → 0.28

Explanation:

By the mass of the two elements in the solution, we determine the moles of each:

25 g . 1 mol/ 18g = 1.39 moles of water (solute)

25 g . 1 mol / 46 g = 0.543 moles of ethanol (solvent)

Mole fraction solute = Moles of solute / Total moles

Mole fraction solvent = Moles of solvent / Total moles

Total moles = Moles of solute + Moles of solvent

1.39 moles of solute + 0.543 moles of solvent = 1.933 moles → Total moles

Mole fraction H₂O = 1.39 / 1.933 → 0.72

Mole fraction C₂H₅OH= 0.543 / 1.933 → 0.28

Remember that sum of mole fractions = 1

8 0
2 years ago
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Which statement about Earth's core helps explain Earth's magnetic field?
Vesnalui [34]

Answer:

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5 0
3 years ago
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When Luis burns wood in a campfire, the particles in the wood break down and energy is released. What type of energy does the wo
matrenka [14]

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chemical energy is stored in the wood before combustion.

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3 years ago
What does fossil mean in my own words
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Because yes

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3 years ago
If the formula for a compound is represented by X3Y2 and the charge on the Y ion is -3, what is the charge in the X ion?
artcher [175]
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so in my opinion it is in between b and c. use your best judgment. 
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2 years ago
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