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KATRIN_1 [288]
3 years ago
5

A store sells 4 reams of paper for $23.08. Which proportion can be used to find the cost of 12 reams of paper?

Chemistry
1 answer:
sashaice [31]3 years ago
3 0
The answer is A. 12/23.08=x/4

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Chlorine is used to disinfect swimming pools. the accepted concentration for this purpose is 1.00 ppm chlorine, or 1.00 g of chl
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The accepted concentration of chlorine is 1.00 ppm that is 1 gram of chlorine per million of water.

The volume of water is 2.29\times 10^{4} gal.

Since, 1 gal= 3785.41 mL

Thus, 2.29\times 10^{4} gal=2.29\times 10^{4}\times 3785.41 mL=8.66\times 10^{7}mL

Density of water is 1 g/mL thus, mass of water will be 8.66\times 10^{7}g.

Since, 1 grams of chlorine →10^{6} grams of water.

1 g of water →10^{-6} g of chlorine and,

8.66\times 10^{7}g of water →86.6 g of chlorine

Since, the solution is 9% chlorine by mass, the volume of solution will be:

V=\frac{100}{9}\times 86.6 mL=9.62\times 10^{2} mL

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3 years ago
What type of solvent would be required to dissolve nonpolar compounds?
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For example, ionic compounds, which are very polar, are often soluble in the polar solvent water. Nonpolar substances are likely to dissolve in nonpolar solvents. For example, nonpolar molecular substances are likely to dissolve in hexane, a common nonpolar solvent.
4 0
2 years ago
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Which of the following changes to a system WILL NOT result in an increase in the system’s pressure?
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B. All the rest raise P.

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3 years ago
at standard pressure, what is the temperature at which a saturated solution of NH4Cl has a concentration of 60g NH4CL/100 g H2O
Nataliya [291]

Answer: Temperature = T, unknown

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m = 0.6g NH4Cl/g H2O / 1 g/ml

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What type of chemical reaction involves 2 or more elements combining to form one?
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Hey there!

I believe the answer is Combination (or Synthesis) Reaction. 
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