Hii There!!!1) 1 mole of He contains 6.023x10^23So, 52 moles of He contains 52 x 6.023 x10^23atoms2) Atomic mass of HELIUM is 4u = 2protons + 2 NEUTRONS = 1 atom So, The number of ATOMS in 52u = 52/4 = 13 atoms.3) 4g of He has 1 mole =) 1g of He has 1/4 mole So, 52g of He has 1/4 x 52 = 13 moles Since, 1 mole=6.022x10^23atoms So, 13 moles 13x6.023x10^23 atoms.Hope it helps☺️
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