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| When non-metals combine with non-metals, both elements in the binary compound are trying to _____ electrons. |
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| Whenever Iron forms a compound with a non-metal, a ________ must appear in the name to indicate the valence of Iron. |
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| Which family in the periodic table does not form binary compounds? |
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GROUP 8A (the Nobel or Inert Gases) |
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| Metals will never form bonds with metals because both atoms are trying to _____ electrons. |
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| An atom that always forms a +3 ion would most likely be in which family? |
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| An atom which forms a -3 ion would most likely be in which family? |
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group 5A (the Nitrogen family) |
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| When combined with the element sulfur, which one of the following elements would most likely come first in the formula? Br F Si O |
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| Si (because it is further to the left in the periodic table - more metallic - and would tend to lose electrons to the sulfur to become the (+) cation. |
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| ALL binary compounds end in the suffix _____. |
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| Which of the following elements would most likely form an anion? Fe Cl Ga Cs Mg |
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| Cl (it's the only non-metal in the list and would most likely gain electrons because it would have the highest electronegativity value) |
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| Calculate the % of oxygen in the compound, dinitrogen tetraoxide. |
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dinitrogen tetraoxide = N2O4 (F.W. = 92)
64/92 X 100 = 69.6% oxygen |
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| Calculate the % of nitrogen in nitrogen triiodide. |
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nitrogen triiodide = NI3 (F.W. = 394.7)
14/394.7 X 100 = 3.5 % nitrogen |
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A compound is found to contain 70.0 % Iron and 30.0 % oxygen. Determine the empirical formula from the above information and name the compound. |
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Fe2O3
Iron III oxide Step 1: divide the percent by the element F.W. from the periodic table Step 2: divide the largest by the smallest numbers from the above step to get the empirical formula. |
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| How many grams are in 2.75 moles of Molybdinum sulfide? |
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One mole of MoS2 is equal to the formula weight of 160.2 grams.
2.75 mole x 160.2 grams = 441 grams
1 mole |
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| How many grams are needed to have one mole of phosphorus trichloride? (answer to 1 decimal place). |
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