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Bohr's Model of a Hydrogen Atom

How many atom...

Question

How many atoms are present in 2 moles of calcium? (Atomic mass=40)

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Solution

Dear student,

According to mole concept,
1 mole = gram molar mass of the substance = 6.022 * 10²³ particles of the substance

Hence 1 mole of Ca = 40 g of Ca = 6.022 * 10²³ atoms of Ca

Therefore 2 mole Ca = (6.022 * 10²³ )*2 atoms of Ca = **12.044 * 10²³ atoms of Ca**

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