Answer:
<em>K</em><em>+</em><em>Cl</em><em /><em>KCl</em>
Explanation:
because the reaction is between metal Potassium and Non-metal Chlorine
The density of marble is between 2.6 and 2.8 grams per cm³ .
Density doesn't depend on how much mass or volume of it you have.
The density of a chip of it is the same as the density of a truckload of it.
The average atomic mass of hydrogen (99% H-1, 0.8% H-2, and 0.2% H-3) is 1.012 amu.
The average atomic mass of hydrogen can be calculated with the following equation:

Where:
: is the mass of protium (H-1) = 1
: is the <em>mass</em> of deuterium (H-2) = 2
: is the <em>mass </em>of tritium (H-3) = 3
: is the abundance percent of H-1 = 99%
: is the <em>abundance percent</em> of H-2 = 0.8%
: is the <em>abundance percent</em> of H-3 = 0.2%
The average atomic mass is:

Changing all the <u>percent values</u> into <u>decimal ones</u>, we have:

Therefore, the average atomic mass of hydrogen is 1.012 amu.
Learn more about average atomic mass here brainly.com/question/8575403?referrer=searchResults
I hope it helps you!
Water, Water is not a pure substance. It is a mixture, and Chromatography