Multiple Choice
What is the concentration of H^+ ions in a 0.010 M aqueous solution of sulfuric acid (H_2SO_4), assuming complete dissociation?
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2. Atoms & Elements
Calculating Molar Mass
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What is the molar mass of aluminum (Al)?
A
55.85 g/mol
B
12.01 g/mol
C
26.98 g/mol
D
35.45 g/mol
Verified step by step guidance1
Understand that the molar mass of an element is the mass of one mole of its atoms, usually expressed in grams per mole (g/mol).
Locate aluminum (Al) on the periodic table to find its atomic mass, which is the average mass of its naturally occurring isotopes weighted by their abundance.
Identify the atomic mass of aluminum, which is typically found as a number below the element symbol on the periodic table.
Recognize that this atomic mass value corresponds directly to the molar mass of aluminum in g/mol.
Conclude that the molar mass of aluminum is the atomic mass value you found on the periodic table, which is approximately 26.98 g/mol.
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