Calculate the molality of a solution formed by adding 4.40 g nh4cl to 11.0 g of water.

[NaCl] = 6.84 m

Explanation:

Molality is mol of solute / 1 kg of solvent

Let's convert the mass of solvent to kg

11 g = 0.011 kg

Now, let's convert the mass of solute to moles

Mass / molar mass

4.4 g / 58.45 g/mol = 0.0752 moles

Molality → 0.0752 mol / 0.011 kg = 6.84 m

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.  

it would be a gas formation