How Many Atoms of HBr are in 45mL of a 2.9 Molar Solution?
What is the relationship between molarity, volume, and the number of atoms in a solution of HBr?
The number of atoms of HBr in a solution can be determined by calculating the number of moles of HBr present in the solution using the molarity and volume of the solution. Once the number of moles is known, it can be converted into the number of atoms using Avogadro's number.
Calculating the Number of Atoms of HBr:
Given data:
Molarity = 2.9 mol/L
Volume of solution = 45 mL = 0.045 L
Number of moles = 2.9 × 0.045 = 0.1305 moles
One mole of HBr contains Avogadro's number of molecules, which is 6.022 x 10²³. Therefore, to find the number of atoms in the solution:
0.1305 moles HBr x (6.022 x 10²³) atoms HBr per mole HBr = 7.854 x 10²² atoms of HBr
Thus, there are 8.63 x 10²² atoms of HBr in 45 mL of a 2.9 molar solution.