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4 years ago

What tendency is the standard reduction potential of an element based on?

1 answer:

4 0

The tendency of the standard reduction potential of an element is to be reduced and is based on the measurement of volts at standard conditions. The more positive the standard potential of an element, the more it is reduced

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The proper technique used to obtain a liquid sample using a pipette involves: Group of answer choices your mouth on one end of t

Ksivusya [100]

Answer:

A suction bulb or pipette pump to suction the sample.

Explanation:

There are different types of pipettes that can be used in a laboratory:

Volumetric pipette-used to transfer a specific calculated amount of liquid
Graduated pipettes-used to transfer different calculated amounts of liquid from one container to another.
Micropipettes-used to transfer small amounts of liquids
Pasteur pipettes- just like micropipettes, pasteur pipettes are used to transfer small amounts of liquids, but manually. They are also called droppers.

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3 years ago

I have a question worth 25 points check my profile

Zarrin [17]

Answer:

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3 years ago

A 544 mg of a mixture of fluorene and benzoic acid was weighed out and subjected to an extraction and recrystallization. After t

butalik [34]

Answer: The percent composition of fluorene is 33.08 % and benzoic acid is 36.03 %.

Explanation:

We are given:

Mass of mixture = 544 mg

Mass of fluorene after purification = $1.80\times 10^2mg=180mg$

Mass of benzoic acid after purification = 196 mg

To calculate the percentage composition of a substance in a mixture, we use the equation:

$\%\text{ composition of substance}=\frac{\text{Mass of substance}}{\text{Mass of mixture}}\times 100$

For fluorene:

$\%\text{ composition of fluorene}=\frac{180}{544}\times 100=33.08\%$

Hence, the percent composition of fluorene is 33.08 %

For benzoic acid:

$\%\text{ composition of benzoic acid}=\frac{196}{544}\times 100=36.03\%$

Hence, the percent composition of benzoic acid is 36.03 %

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4 years ago

Acids add ______ ions to a solution. A. H+ B. OH+ C. OH- D. H-

mamaluj [8]

Answer: A)H+

Explanation:my teacher just told me

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4 years ago

Read 2 more answers

If 1.oo mol CS2 reacts with 1.00 mol O2 , identify the limiting reactant

miss Akunina [59]

moles of excess reactant remaining: 0.67 mol CS2

moles of each product formed: 0.33 mol CO2 and 0.67 mol SO2

your coefficients in the chemical equation reveal the molar ratio of the reactants that must be present to give a complete reaction of both reactants. in this case each mole of CS2 requires 3 moles of O2 to form the products given. if you start with equimolar amounts of both reactants then the O2 must be in insufficient supply to completely react with all of the CS2. if only 1 mole of O2 is present, it will be consumed by one third that amount of CS2. all O2 will react. 0.67 mole of CS2 will remain. the CO2 comes from the carbon in CS2, so 0.33 mole of CO2 will be produced. since 2 moles of SO2 are produced for each mole of CO2 produced, then the amount of SO2 produced will be 0.67 mol.

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3 years ago