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Anestetic [448]
3 years ago
11

what is the total amount of energy absorbed by the substance as it completely changes from a solid at 40 degrees to a gas at 200

degrees
Chemistry
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

I don't know the answer sorry man

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Answer:

where is diagram. sorry.

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3 years ago
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98 POINTS!!! Must SHOW YOUR WORK!
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D) If only 6.6 grams of water are produced, what is the percent yield?

Write out the balanced equation:

2C2H6 + 7O2 --> 4CO2 + 6H2O

Then, determine the limiting reagents:

16.8 grams of C2H6/30.06 g/mol of C2H6 = 0.46 mol

45.8 grams of O2/32 g/mol of O2 = 1.4 mol

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1.4 mol of O2/7 = 0.20

<em>- Dioxygen is the limiting reagent.  </em>

Find the theoretical molar yield of water:

There is a 7 mol of O2 to 6 mol of H2O ratio (according to the balanced equation).

<em>We can setup a proportion;</em>

7/6 = 0.23/x

0.196 = x

So, 0.196 mol of water will be produced.

How many grams of water will be produced in the reaction?

<em><u>0.196 mol of H2O x 18 g/mol of H2O = 3.53 grams of H2O </u></em>

6 0
3 years ago
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What element on the periodic table is named after the european capital where it was discovered in 1923?
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i think it would be Hafnium

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3 years ago
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How does the energy of an electron change when the electron moves closer to the nucleus?
tankabanditka [31]
It increases. B.

Close to the nucleus are high energy levels, because of the pull of the nucleus.  But farther away from the nucleus, the electrons there are of low energy level.
5 0
4 years ago
If the partial pressure of oxygen in a scuba air tank is 73.44 atm, the partial pressure of nitrogen is 128.52 atm, and the part
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To answer this, we use Raoult's Law where the partial pressure is equal to the product of the fraction of the gas in the mixture and its total pressure. Also, we use Dalton's Law of Partial Pressure where the total pressure is equal to the sum of the partial pressure of the gases in the mixture.

Ptotal = 73.44 + 128.52 + 2.04 = 204 atm

201.96 = x (204)
x = 0.99

4 0
3 years ago
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