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padilas [110]
3 years ago
13

Why do some scientists prefer to express concentrations of water contaminants in the units ppm and ppb rather than molarity?

Chemistry
1 answer:
ira [324]3 years ago
4 0

Explanation:

These molarity units are used to express very small solute concentrations. Molarity cannot be used to express small amount of solute dissolved in solvents.

parts per million ppm  is a dimensionless quantity that represents the part of a whole number in units of \frac{1}{1000000}

parts per billion ppb represents the part of a whole in units of  \frac{1}{1000000000}

These quantities are useful in determining very small amount of solute like gold concentration in stream sediments.

Learn more:

ppm brainly.com/question/2854033

#learnwithBrainly

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Given R=0.0821L⋅atmmol⋅K, how many moles of gas are in a 1.25 L container at 300K and 2.07 atm?(1 point)
Natalka [10]

Answer:

B, 0.105 mol

Explanation:

brainly.com/question/24865185

4 0
3 years ago
At high pressures how does the volume of a real gas compare with the volume of an ideal gas under the same conditions and why
malfutka [58]
Answer: No, a<span>t high pressures, volume of a real gas does not  compare with the volume of an ideal gas under the same conditions.

Reason: 
For an ideal gas, there should not be any intermolecular forces of interaction. However, for real gases there are intermolecular forces of interaction like dipole-dipole and dipole-induced dipole. Further, at high pressures, molecules are close by. Hence, extend of these intermolecular forces is expected to be high. This results in decreases in volume of real gas. Thus, </span>volume of a real gas does not  compare with the volume of an ideal gas under the same conditions.

3 0
3 years ago
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What is the vapor pressure (in mm Hg) of a solution of 17.5 g of glucose (C6H12O6) in 82.0 g of methanol (CH3OH) at 27∘C? The va
vichka [17]

Answer:

134.8 mmHg is the vapor pressure for solution

Explanation:

We must apply the colligative property of lowering vapor pressure, which formula is: P° - P' = P° . Xm

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Xm → moles of solute / total moles = 0.0972 / 2.6572 = 0.0365

We replace the data in the formula

140 mmHg - P' = 140 mmHg . 0.0365

P' = - (140 mmHg . 0.0365 - 140mmHg)

P' = 134.8 mmHg

5 0
3 years ago
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allsm [11]

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i know 3, reproduction, organisms, and variations in traits

Explanation:

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