7.15g of Na2Co3.xH2O is dissolved in 250cm^3 of distilled water to form 0.10mol/dm^3.The entire solution was reacted with HCL to produce NaCl, H2O and 8960cm^3 of CO2 gas at stp in a beaker. Calculate 1.the contentration of Na2CO3.xH2O in g/dm^3
2.the molar mass of Na2CO3.xH2O

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.  

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.