2. Atoms & Elements

Mole Concept

Scelta multipla
How many carbon atoms are present in 0.174 moles of carbon?
1159
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Scelta multipla
Which of the following solutions contains the same number of moles of KCl as 75.00 mL of a 0.250 M solution of KCl?
124
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Domanda aperta
The number of hydrogen atoms in 0.050 mol of c3h8o3 is
1656
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Scelta multipla
How many carbon atoms are present in $1$ mole of carbon (i.e., $1 \times N A_{}$ atoms)?
76
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Scelta multipla
One mole of particles of any substance contains how many particles?
123
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Domanda aperta
How many moles of sodium (Na) do you have in a sample of 9.8 × 10²³ atoms Na?
1280
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Scelta multipla
How many moles of sodium carbonate (Na2CO3) contain 1.773 × 10^17 carbon atoms?
1272
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Scelta multipla
How many atoms of Mg, O, and H are present in 3 formula units of Mg(OH)_2?
159
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Scelta multipla
How many atoms are present in one mole of a substance?
145
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Scelta multipla
What is the numerical value of a mole, representing the number of atoms or molecules in one mole of a substance?
127
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Scelta multipla
How many magnesium atoms are present in 1.00 mole of MgO?
177
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Domanda aperta
The mass of 0.550 mol of methanol, CH₃OH, is g (round to three significant figures).
1193
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Scelta multipla
In which field of science is the mole most commonly used as a unit of measurement?
119
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Scelta multipla
How many moles of chloride ions are present in 2 moles of calcium chloride (CaCl_2)?
143
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Scelta multipla
How many molecules are present in 0.500 mole of N_2O_5?
136
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