# How to scale reaction to have equal amounts of e-​

• Réponse publiée par: enrica11

• Réponse publiée par: sherelyn0013

B. Potassium

Explanation:

Alkali metals are found in the first column of the periodic table (disregarding Hydrogen of course since it is a non-metal and its placement in the table is unique)

• Réponse publiée par: shannel99

Good Day...

Problem:

A student boils 9.43 grams of an unknown substances into vapor .if completely vaporizing the substance requiered 8,720 joules of energy ,what is the heat of vaporization?The heat of vaporation is joules/gram

Given:

m (grams) = 9.43

q (heat) = 8,720 joules

Hv (heat of vaporation) = ? unknown

Solution:

We can solve the problem using

heat of vaporation = heat / mass (Hv = q/m)

Hv = q/m

= 8,720 joules / 9.43 g

= 924.708 joules/g

Heat of Vaporization is 924.708 joules/g

• Réponse publiée par: kambalpandesal23

What is amino acids? In organic chemistry it is any organic compound containing both an amino and a carboxylic acid functional group. According to biochemistry it is any of the twenty naturally occurring a-amino acids (having the amino, and carboxylic acid groups on the same carbon atom), and a variety of side chains, that combine, via peptide bonds, to form proteins. How about biuret? In organic compound it the compound formed by condensation of two molecules of urea with the loss of a molecule of ammonia, (NH2-CO)2NH, or any of its derivatives.

Why or why not?

Amino acid cannot give a positive result in Biuret test reaction because it contains copper ions that will only interact with a compound that contains two or more peptide bonds resulting in the formation of violet/purple colored product. The Biuret test only gives a positive result if there are intact peptide bonds. A biuret reagent may be used to test the aqueous sample. This blue reagent is made by combining sodium hydroxide and copper sulfate solutions.The biuret test is also used to detect proteins. That is because proteins are made up of polypeptides, which in turn, are made of amino acids joined by peptide bonds.
Connaissez-vous la bonne réponse?
How to scale reaction to have equal amounts of e-​...