The atomic mass of calcium is 40 u. Wha twill be the no. of calcium atoms in 0.4 u of calcium ?
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40u contains 1 mole of Ca
0.4u contains (0.4/40 moles) Ca = 1/100 moles
1 mole of Ca contains 6.02*10²³ atoms
so 0.01 mole of Ca contains 6.02*10²¹ atoms
0.4u contains (0.4/40 moles) Ca = 1/100 moles
1 mole of Ca contains 6.02*10²³ atoms
so 0.01 mole of Ca contains 6.02*10²¹ atoms
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6.023×10²² particlessss
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