Why do you think that KCl can be used as an effective water softener and also as a drug to kill someone? What is the difference between the two solutions? please I'm failing this class

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now