Which of the following samples contains 2.0 * 1023 atoms ?
a) 8.0 g O2 b) 3.0 g Be c) 8.0 g C d) 19.0 g F2
Molar atomic mass of Be=9
Number of atoms in 3g Be= (Avogadro number )(mass of Be)/ molar mass of Be
=(6.023 x1023)(3g)/9g = 2.0 x1023
Which of the following samples contains 2.0 * 1023 atoms ?
a) 8.0 g O2 b) 3.0 g Be c) 8.0 g C d) 19.0 g F2
Molar atomic mass of Be=9
Number of atoms in 3g Be= (Avogadro number )(mass of Be)/ molar mass of Be
=(6.023 x1023)(3g)/9g = 2.0 x1023