This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Step 1: Calculate the number of moles of aluminium in 0.9 g. The molar mass of aluminium (Al) is given as 27 g/mol. Moles of Al = Mass of AlMolar mass of Al Moles of Al = 0.9 g27 g/mol Moles of Al = 0.0333... mol Moles of Al = (1)/(30) mol Step 2: Calculate the number of atoms in this amount of aluminium. We are given that 1 mole of aluminium contains 6 × 10^23 atoms. Number of atoms = Moles of Al × Avogadro's number Number of atoms = (1)/(30) mol × 6 × 10^23 atoms/mol Number of atoms = (6)/(30) × 10^23 atoms Number of atoms = (1)/(5) × 10^23 atoms Number of atoms = 0.2 × 10^23 atoms Number of atoms = 2.0 × 10^22 atoms Comparing this result with the given options: A. 1.0 × 10^21 B. 6.6 × 10^21 C. 2.0 × 10^22 D. 6.0 × 10^22 The calculated number of atoms matches option C. The number of atoms contained in 0.9g of aluminium is C. 2.0 × 10^22. That's 2 down. 3 left today — send the next one.