Question

mass of sodium in 53 gram of Na2CO3 is?

plz explain the answer immediately

Answer 1

given wt. of Na2CO3=53g

molar mass of Na2CO3=23*2+12+16*3

                                          =106

NOW NO. OF MOLES n=wt. in grams/molar mass

                                          =53/106

                   =0.5 moles

Now we know that 53g of Na2CO3 contains 0.5 moles of Na

No. of atoms of Na =6.022*1023 * 0.5

  =3.011*1023