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AlexFokin [52]
3 years ago
5

..........................

Chemistry
1 answer:
Andru [333]3 years ago
6 0
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What is the enthalpy change (in kj) of a chemical reaction that raises the temperature of 250.0 ml of solution having a density
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<span>250 ml * 1.25 g/ml * 3.74 j/g-K * 9.2 K = 10.752 kJ Pretty much, all you need to do here is multiply all of these out to get your final answer. Not all questions are this easy, but this is certainly one of them.</span>
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3 years ago
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When dilute HCL is added to zinc pieces taken in a test tube​
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Answer:

zince chloride will be formed and hydrogen gas will be librated.

Explanation:

When dilute HCl is added to zinc pieces, a rection will takes place as follows :

Zn+HCl\rightarrow ZnCl_2+H_2

It means that zinc chloride will form when zinc reacts with dilute HCL. Also hydrogen gas will produced.

As zinc is more reactive than hydrogen, it displaces hydrogen from its solution and forms zinc chloride. The form product is white in color and H₂ is an odorless gas.

Hence, zince chloride will be formed and hydrogen gas will be librated.

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Are isotopes similar to ions, yes or no?
AysviL [449]

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Yes

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Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. Everything else about them is the same.(If you want more explanation tell me).

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100 J of energy are needed to heat the copper from 20∘C to 80∘C .

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