Una masa de sulfato de niquel ii se encuentra contenida en 200ml de solucion al 6% en masa de sulfato de níquel ii con una densidad de la solución de 1.06g/ml . la cantidad de masa de sulfato de níquel ii contenida es:

The solution contains 13 g NiSO₄.

First, calculate the mass of the solution.

Mass of solution = 200 mL solution × (1.06 g solution/1 mL solution) = 212 g solution

Then, calculate the mass of NiSO₄.

Mass of NiSO₄ = 212g solution × (6 g NiSO₄/100 g solution) = 13 g NiSO₄

Note: The answer can have only one significant figure because that is all you gave for the mass % of NiSO₄.  However, I calculated the answer to two significant figures.

personal, she chose to do it.

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.