The answer is C because Vinegar trigger bubbles.
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Radon is the heaviest gas on Earth with a density of about 9.73 g/L. This is very high actually.
For more informations, radon is mostly used in radioactivity and cancer therapy.
Hope this Helps :)
The phenotype for the genotype bb would be Purple and white
Safety is correct your welcome
They are all part of the ammonium ion (NH4) of which there are 3 in the molecule.
So the number of hydrogen atoms = 4 * 3 = 12.