A compound was found to be soluble in water. It was also found that addition of acid to an aqueous solution of this compound resulted in the formation of carbon dioxide. Which one of the following cations would form a precipitate when added to an aqueous solution of this compound?
Options
a. NH4
b. K
c. Cr
d. Rb
e. Na
Answer: c: Cr
Explanation:
The aforementioned reaction are banters for to distract ones focus from the question.
However it should be noted that
Cr can be found in tannery waste water showing that it can be soluble in water.
The carbonate compound when reacting with acid CO_2 evolves.
Focusing on the cation that would form a precipitate when added to an aqueous solution.
Chemical precipitation method is a common method for to remove chromium and to recover it from tannery wastewater.
Cr would form a precipitate.
The tectonic plates are made up of many things but mainly rock and the guy who posted an answer dose not know what he's talking about
Answer: The answer is: " 7.81 kg " .
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Explanation:
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Note the exact conversion: 1000 g = 1 kg ;
0.00781 g = ? kg :
So: To convert "0.0781 g" ; to "units in kg" ;
→ we multiply the value: 0.00781 g ; by "1000" ;
So: Given: " 0.00781 g " ;
→ we move the decimal point "3 (three) spaces forward" ;
to get: " 7.81 kg " .
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Hope this helps!
Wishing you the best in your academic pursuits
— and within the "Brainly" community!
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Answer: The transition metals have the following physical properties in common: <em><u>they are good conductors of heat and electricity. they can be hammered or bent into shape easily. they have high melting points</u></em> (but mercury is a liquid at room temperature)
Explanation:
