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2 years ago

How many grams of KNO3 are required to prepare 0.250 L of 0.70 M solution?

Chemistry

1 answer:

drek231 [11]2 years ago

4 0

Answer:

about 3

Explanation:

just did this for the points just being honiest

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What species is reduced in the reaction below?

lesya692 [45]

Answer: The correct option is D) $Ag^+$

Explanation:

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when oxidation number of a species decreases.

For the given chemical reaction:

$Zn^0+2Ag^+\rightarrow Zn^{2+}+2Ag^0$

On the reactant side:

Oxidation number of Zn = 0

Oxidation number of Ag = +1

On the product side:

Oxidation number of Zn = +2

Oxidation number of Ag = 0

As the oxidation number of Ag is decreasing from +1 to 0. Thus, $Ag^+$ is getting reduced.

Hence, the correct option is D) $Ag^+$

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3 years ago

If a sample of 0.362 m lithium phosphate contains 0.284 g of lithium, what is the volume of the sample?

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From the periodic table:
mass of lithium = 6.941 grams
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molarity = number of moles of solute / liters of solution
volume (in liters) = number of moles of solute / molarity
volume = 0.0409 / 0.362 = 0.1129 liters

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How many grams of KNO3 are required to prepare 0.250 L of 0.70 M solution?​

How many grams of KNO3 are required to prepare 0.250 L of 0.70 M solution?