What is the number of moles of kf ina 29 g sample of the compound

0.5 moles KF

Mass of the compound = 29 g KF(Potassium chloride)

We need to get the moles of KF

Moles are given by dividing the mass of a compound by its molar mass.

In this case,

Molar mass of potassium chloride = 58.0967 g/mol

Therefore;

Moles = 29 g ÷ 58.0967 g/mol

          = 0.5 moles

Therefore, 29 g of KF contains 0.5 moles

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

l dont know l am s sorry