Describe the formula for figuring out how many atoms of a specific element there are in a given mass of a compound.

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Elizabeth Farmer · Accepted Answer

The number of atoms:The first step in calculating the number of atoms is to determine the number of moles. To get the number of moles in an element or compound, divide the supplied mass by the element or compound&#039;s molar mass. The number of atoms in 1 mole of a substance isNAor 6.023×1023 atoms.Multiply the given moles with NA to find the total number of atoms.Example 1: To calculate the number of atoms in 46g of NaStep-1: Calculate the number of molesNumber of moles = GivenmassMolarmass=4623=2molStep 2: Calculate the number of atomsThe number of atoms= number of moles×NA=2×6.023×1023=12.046×1023=1.2046×1023atoms. To determine the atomic composition C in 22gofCO2Step-1: Calculate the number of molesNumber of moles = GivenmassMolarmass=2244=0.5molStep 2:Determine how many atoms there are.The number of atoms= number of moles×NASince CO2 is triatomic. i.e 1 molecule of CO2 contain 1 atom of C and 2 atom of OThe total number of atoms =0.5×3×6.023×1023=9.0345×1023 atoms.The number of atoms of C=0.5×1×6.023×1023=3.0115×1023 atoms.

Describe the formula for figuring out how many atoms of a specific element there are in a given mass of a compound.

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