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lara [203]
3 years ago
5

Which of the following is true concerning redox reactions? A. Double-replacement reactions are always redox reactions. B. Single

-replacement reactions may be redox reactions. C. Acid-base reactions are always redox reactions. D. all of the above
Chemistry
2 answers:
Rasek [7]3 years ago
5 0
The question to your answer is Single replacement reactions may 6e redox
sergiy2304 [10]3 years ago
4 0

B. Single-replacement reactions may be redox reactions.

i took the test

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Answer:

0.79 g

Explanation:

Let's introduce a strategy needed to solve any similar problem like this:

  • Apply the mass conservation law (assuming that this reaction goes 100 % to completion): the total mass of the reactants should be equal to the total mass of the products.

Based on the mass conservation law, we need to identify the reactants first. Our only reactant is sodium bicarbonate, so the total mass of the reactants is:

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We have two products formed, sodium carbonate and carbonic acid. This implies that the total mass of the products is:

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Substitute the given variables:

m_{NaHCO_3}=m_{Na_2CO_3}+m_{H_2CO_3}

Rearrange for the mass of carbonic acid:

m_{H_2CO_3}=m_{NaHCO_3}-m_{Na_2CO_3}=2.36 g - 1.57 g=0.79 g

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Basile [38]
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1. What is the function of the circulatory system? * 10 points A. Provide blood with oxygen from the air, & to get rid of ca
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