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galina1969 [7]
2 years ago
5

Which equation represents single replacement reaction? A) CH4 + 2 02 → CO2 + 2 H2O B) CaCO3 + CaO + CO2 C) 2 Na + 2 H2O → 2 NaOH

+ H2 D) LiOH + HCl → LiCl + H2O​
Chemistry
1 answer:
loris [4]2 years ago
6 0

Answer:

C) 2 Na + 2 H2O → 2 NaOH + H2.

Explanation:

Hello there!

In this case, according to the given chemical reactions, it is possible to firstly understand that a single displacement reaction is characterized by the presence of a single element as the first reactant and a compound as the second one, thus, yielding a compound as the first product and a single element as the second one.

In such a way, according to the given choices, it possible to note that C) 2 Na + 2 H2O → 2 NaOH + H2 is the only one with the aforementioned condition as the element at the reactants side is Na and at the products side is H2.

Best regards!

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Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolat
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Answer:

The correct answer is 0.00582 grams.

Explanation:

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Therefore, the pressure of H2 will be,

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By inserting the values in the equation we get:

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= 0.00582 grams.

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