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2. Atoms & Elements

Mole Concept

2. Atoms & Elements

Mole Concept

Multiple Choice
Given that the molar mass of LiF is 25.94 g/mol, how many moles of LiF are present in a 10.37 g sample?
Multiple Choice
How many atoms are present in 2.0 moles of carbon?
Multiple Choice
A sample contains 0.25 mol of NaCl. How many formula units of NaCl are present in the sample?
Open Question
How many moles of water, H₂O, contain 2.0×10²² molecules of water?
Multiple Choice
One mole (mol) of glucose (molecular mass = 180 daltons) is:
Multiple Choice
How many molecules of ammonia (NH_3) are present in 10.4 moles of ammonia?
Open Question
How many moles of aluminum are in 54.0 grams of aluminum (Al)?
Multiple Choice
How many molecules of CH4 are present in 43.2 grams of methane (CH4)?
Multiple Choice
If the density of water is 1.00 g/mL at 25°C, calculate the number of water molecules found in 1.50 x 10³ µL of water.
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Multiple Choice
Which of the following is equal to one mole of calcium atoms?
Multiple Choice
What is the mass, in grams, of 3.09 × 10^{24} atoms of sulfur (atomic mass = 32.07 g/mol)?
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Multiple Choice
What is the quantity, in moles, of KBr present in 60.0 mL of a 0.150 M KBr solution?
Multiple Choice
How many moles of carbon atoms are present in 1.22 moles of C6H12O6?
Multiple Choice
What is the quantity, in moles, of NaI present in 175.0 mL of a 0.230 M NaI solution?
Multiple Choice
Which of the following numerical expressions gives the number of atoms in 2.0 g of Ne (neon)?