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2. Atoms & Elements

Mole Concept

2. Atoms & Elements

Mole Concept

Multiple Choice
Which statement best explains the purpose of using a mole in the measurement of matter?
Open Question
What would be the mass of a sample containing 0.7 mol of pure tungsten?
Open Question
In 1.75 mol of methane, CH₄, there are ______ molecules of methane.
Open Question
What is the mass of 5 moles of Fe₂O₃?
Multiple Choice
How many atoms are present in 14 moles of cadmium (Cd)?
Multiple Choice
How many moles of oxygen atoms are present in 132.2 g of MgSO_4?
Multiple Choice
In the mole concept, how many copper atoms are present in $1 mol$ of copper (Cu)?
Multiple Choice
How many moles are present in 2.3 grams of phosphorus (P)? (Atomic mass of P = 30.97 g/mol)
Multiple Choice
What is the total concentration of ions in a 0.0360 M solution of Na₂CO₃?
Multiple Choice
How many moles of copper are present in a sample with a mass of 63.546 grams? (Atomic mass of copper = 63.546 g/mol)
Multiple Choice
Avogadro's law states that at a given temperature and pressure:
Multiple Choice
What is the mass of sodium metal that contains 4.653 × 10^{19} Na atoms? (Atomic mass of Na = 22.99 g/mol)
Open Question
How many oxygen atoms are contained in 2.74 g of Al₂(SO₄)₃?
Multiple Choice
How many atoms are in 4.78 moles of sulfur?
Multiple Choice
How many atoms are present in 0.250 moles of Rb?