Chemistry Chapter 7.1 and 16.1 – Flashcards
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| How many valence electrons does a helium atom have? |
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| 2 |
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| What is the gram formula mass of AuCl3 |
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| 303.6 g |
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| Avogadro's number of representative particles is equal to one ____ |
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| mole |
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| How many valence elections are there in an atom of phosphorus |
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| 5 |
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| How many atoms are there in 3.5 moles of arsenic atoms |
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| 2.1x10^24 atoms |
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| How many atoms are there in 4.7 moles of hafnium? |
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| 2.83x10^24 atoms |
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| Which of there elements does not exist as a diatomic molecule? H, F, I, Ne |
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| Ne |
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| How many valence elections does an atom of any halogen have? |
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| 7 |
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| What is the gram formula mass of chromic sulfate, Cr2(SO4)3 |
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| 392.2 g |
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| How many valence elections are there in an atom of magnesium? |
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| 2 |
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| What SI unit is used to measure the number of representative particles in a substance? |
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| mole |
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| How many electrons are shared in a dingle covalent bond |
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| 2 |
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| How many moles of silver atoms are there in 1.8x10^-4 atoms of silver? |
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| 3.0x10^-4 |
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| How many electrons are shared in a double covalent bond? |
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| 4 |
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| A diatomic molecule with a triple covalent bond is ____ |
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| N2 |
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| How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O |
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| 35 |
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| How many valence electrons are there in a silicon atom? |
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| 4 |
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| How many molecules are there in 2.9 mol Co2 |
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| 1.75x10^24 |
