How many grams the in 4.5times 10^22 molecules of Ba(NO_(2))_(2)

To find the mass of molecules of , we need to follow these steps:1. Calculate the molar mass of .2. Convert the number of molecules to moles.3. Calculate the mass of the substance.Step 1: Calculate the molar mass of .The molar mass of is calculated by adding the molar masses of its constituent elements:Molar mass of = Molar mass of Ba + 2 * Molar mass of N + 4 * Molar mass of OMolar mass of = 137.33 g/mol + 2 * 14.01 g/mol + 4 * 16.00 g/molMolar mass of = 261.34 g/molStep 2: Convert the number of molecules to moles.To convert the number of molecules to moles, we use Avogadro's number, which is molecules/mol.Number of moles = Number of molecules / Avogadro's numberNumber of moles = molecules / molecules/molNumber of moles ≈ 0.0747 molStep 3: Calculate the mass of the substance.Mass = Number of moles * Molar massMass = 0.0747 mol * 261.34 g/molMass ≈ 19.58 gTherefore, the mass of molecules of is approximately 19.58 grams.