Question

answer should be 26 na because no.of moles will come 1​

Answer 1

Answer:

4) 120gm

Explanation:

number of moles of CH4 = (16/16) = 1

number of atoms of CH4 = atomicity× number of molecules

number of atoms of CH4 = (5) × ( moles × avogadro's number)

number of atoms of CH4 = 5 × 1 × avogadro's number

given that

number of atoms of CH4 = number of atoms of Mg

=> number of mole of Mg= number of atom of Mg ÷ avogadro's number

=> number of moles of Mg = { 5× avogadro's number } ÷ avogadro's number

=> number of mole of Mg = 5

mass of Mg = 5×molar mass

mass of Mg = 5×24 = 120g