How many moles of solute are contained in a 250 ml solution that has a concentration of.85 m?

1 answer:

3 0

Volume = 250 mL in liters : 250 / 1000 => 0.25 L

Molarity = 0.85 M

Number of moles:

n = M x V

n = 0.85 x 0.25

n = 0.21 moles

Choice B

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Wuy Piolcululugu<br> Give the names of two organs in the chest.<br> 1. ...............<br> 2 m

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Answer:

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1. The lungs

2. The heart

Explanation:

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This contain the lungs , the tracheobronchial tree , the heart , the blood vessels which transport the blood between the heart and the lungs.

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If element x forms the oxides xo and x2o3 the oxidation numbers of element x are

Deffense [45]

Answer:

b) +2 and +3.

Explanation:

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In this case, given the molecular formulas:

$XO$

And:

$X_2O_3$

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$X^{+2}O^{-2}$