3 years ago

Which system sends messages to organs and tissues? excretory muscular nervous circulatory

Chemistry

1 answer:

vampirchik [111]3 years ago

5 0

Answer:

Hi friend, the answer to your question is NERVOUS SYSTEM.

Explanation:

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g What is the molarity of hydrochloric acid if 40.95 mL of HCl is required to neutralize 0.550 g of sodium oxalate, Na2C2O4

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Answer:

0.0002 M

Explanation:

The molarity of the HCl required would be 0.0002 M.

First, let us consider the balanced equation of the reaction:

$Na_2C_2O_4 + 2HCl = 2NaCl + H_2 + 2CO_2$

Stoichiometrically, 1 mole of $Na_2C_2O_4$ reacts with 2 moles of $HCl$ for a complete neutralization reaction.

Recall that: mole = $\frac{mass}{molar mass}$

Mole of 0.550 g sodium oxalate = 0.550/134 = 0.0041 mole

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0.0041 x 2 = 0.0082 mole HCl

Volume of the HCl = 40.95 L

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Hence, molarity of the HCl = 0.0082/40.95 = 0.0002 M

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3 years ago