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2 years ago

How many 250 mg tablets of metronidazole are needed to make 150 mL of suspension containing

Chemistry

1 answer:

Neko [114]2 years ago

7 0

Answer:

How many 250 mg tablets of metronidazole are needed to make 150 mL of suspension containing

100 mg/mL?

a. 25

b. 30

c.50

d. 60

Explanation:

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Answer:

The concentration of the dilute sample will be 0.361 g/ml

Explanation:

If a solution is diluted into 1:10 ratio then the amount of solute of that solution will be decreased by 10 times.

The initial concentration of the stock solution was 3.61g/ml but when the solution is diluted in 1:10 ratio the solute concentration is also decreased by 10 times.SO at present the solute concentration becomes 3.61/10=0.361 g/ml.

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3 years ago

Density is anything that has mass and takes up space. A. True B. False

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True because it is correct

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2 years ago

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The vapor pressure of pure pentane and pure hexane are 425 torr and 151 torr respectively. equal moles of pentane and hexane are

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The mole fraction of pentane in the vapor is 0.291

Vapour pressure rises with temperature and is a measurement of a substance's propensity to transform into a gaseous or vapour state. The boiling point of a liquid is the temperature at which the pressure exerted by its surroundings equals the vapour pressure present at the liquid's surface.

The number of moles of a particular component in the solution divided by the overall number of moles in the sample solution is known as the mole fraction.

Using the formula for vapour pressure,

vapour pressure = $P^{}$ ° $_{hex}$ × $X_{hex}$ + $P^{}$ ° $_{pen}$ × $X_{pen}$

vapour pressure = 151 × $(1-$ $X_{pen}$ $)$ + 425 × $X_{pen}$

240 = 151 - 151 $X_{pen}$ + 425 $X_{pen}$

240 - 151 = - 151 $X_{pen}$ + 425 $X_{pen}$

89 = 274 $X_{pen}$

$\frac{89}{274}$ = $X_{pen}$

0.291 = $X_{pen}$

Therefore, the mole fraction of pentane in the vapor is 0.291

Learn more about vapour pressure here;

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1 year ago

Balance the equation below, and answer the following question: What volume of chlorine gas, measured at STP; is needed to comple

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The balanced chemical reaction would be expressed as follows:

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3 years ago

Protons are made up of _____ up quarks and one down quark

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Answer:

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