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16 Cards in this Set
- Front
- Back
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Mole (mol)
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the quantity of a given substance that contains as many atoms, molecules, or formula units as the number of atoms in exactly 12g of carbon-12
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Avogadro's number
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6.022 x10^23
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mole =
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6.022 x10^23
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1 mol Li =
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6.022x10^23 Li atoms
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1 mol NH_3 =
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6.022x10^23 NH_3 molecules
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1 AlF_3 =
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6.022x10^23 AlF_3 formula units
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1 molecule of H_2_O =
1 mol H_2_O = |
2 hydrogen + 1 O atom
2 mol H + 1 ml O |
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1 formula unit K_2_O =
1 mol K_2_O = |
2 K^+ ions + 1 O^2- ion
2 mol K^+ + 1 mol O^2- |
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Molar mass
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the mass in grams of one mole of the substance
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H_2_O 18.02 amu =
1 mol H_2_O = |
1 molecule
18.02g |
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How many H atoms are in 5.00 mol of CH_4_?
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1.20x10^25 H atoms
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How many H atoms are in 8.50g of H_2_O?
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5.68x10^23 ??? dont know if correct???
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How many grams of CrCl_3_ contain 8.22x10^24 Cl^1- ions?
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720.g
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Percent composition
mass % X = |
= (mass X / total mas) x 100
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Determine percent composition of PbCrO_4
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O 19.8%
Cr 16.1% Pb 64.1% |
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How many grams of C are in 6.38g of C_12_H_22_O_11_?
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2.69g
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