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emmainna [20.7K]
3 years ago
12

B. Radiation

Chemistry
2 answers:
KIM [24]3 years ago
5 0
Occurs fast is the answer
Vika [28.1K]3 years ago
4 0
First one, occurs fast !
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Which of these, all of which include earth, most likely contains the most dark matter
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Answer:

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Explanation:

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A compound is composed of 58.8% c, 9.8% h, and 31.4% o, and the molar mass is 102 g/mol. what is the molecular formula for this
Ivahew [28]

The solution would be like this for this specific problem:

 

<span>Moles of carbon = 58.8 / 12 = 4.9 </span><span>
<span>Moles of hydrogen = 9.8 / 1 = 9.8 </span>
<span>Moles of oxugen = 31.4 / 16 m= 1.96 </span>
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Simplest formula = C5H10<span>


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8 0
3 years ago
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How can you tell that a gas is a halogen? ___?
OLEGan [10]
If it is located at the second to last row of the periodic table (the halogen family), has seven electrons on it's outer shell, and has an oxidation number of -1, it is a halogen.
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8 0
3 years ago
To interconvert the concentration units molality (m) and mass percent, you must also know the density of the solution. A) True B
uranmaximum [27]

Answer:

The correct answer is option false.

Explanation:

Molality of the solution defined as moles of substance present in 1 kilogram of   solvent.

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Molality=\frac{Moles}{\text{Mass of solvent(kg)}}

Mass of percent (w/w%) of the solution is defined as amount of solute present in 100 grams of solution.

(w/w\%)_=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100

So, if want to inter-convert molality into mass percent we can do that without knowing density of solution.

Mass of solution = Mass of solute + Mass of solvent

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