2. Atoms & Elements

Mole Concept

Scelta multipla
How many moles are present in 199 grams of CCl_4?
136
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Scelta multipla
How many molecules are present in 4.00 moles of glucose (C_6H_{12}O_6)?
201
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Scelta multipla
How many moles are present in 22 grams of argon (Ar)? (Atomic mass of Ar = 39.95 g/mol)
133
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Scelta multipla
A sample contains 18.0 g of water (H_2O). What is the number of moles present in the sample?
124
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Domanda aperta
How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃ is 126.05 g/mol.
1876
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Scelta multipla
Which value approximately represents the number of atoms in one mole of gold?
143
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Scelta multipla
How many xenon atoms are present in 2.36 moles of xenon (Xe)?
150
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Scelta multipla
How many atoms are present in a 24 g sample of carbon (atomic mass = 12 g/mol)?
157
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Scelta multipla
How many sodium atoms are present in 0.2310 g of sodium (Na)?
107
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Scelta multipla
How many grams of glucose (C6H12O6) are present in 3.55 moles of glucose?
177
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Scelta multipla
How many moles are present in 3.01 × 10^{22} atoms of magnesium (Mg)?
133
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Scelta multipla
1 mole of which of the following substances contains the largest number of atoms?
106
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Scelta multipla
How many moles are present in 8.50 × 10^{24} molecules of sodium sulfate (Na_2SO_4)?
54
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Domanda aperta
How many atoms are present in 0.375 mol of palladium (Pd) atoms?
1319
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Scelta multipla
How many grams are present in a sample of calcium (Ca) that contains 2.71 × 10^{20} atoms?
119
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