Stations & Extras - Unit 3 Exam Review
Quiz by Chris Young
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25 questions
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- Q1What is the correct formula for iron (III) phosphate?Fe3P2FePFePO4Fe3(PO4)230s
- Q2The bond between Br atoms in a Br2 molecule is...covalent and is formed by the transfer of two valence electronscovalent and is formed by the sharing of two valence electronsionic and is formed by the sharing of two valence electronsionic and is formed by the transfer of two valence electrons30s
- Q3The gram-formula mass of H2O is 18 grams/mole. How was this determined?H2O is a liquid at 18 degrees, so it's 18.Actually it's 17 grams/mole!The atomic mass of H is 1, and of O is 16. So 2 x(1) + 16 = 18H2O has 3 ions, and three times 6 = 18.30s
- Q4Which change occurs when a barium atom loses two electrons?It becomes a positive ion and its radius decreases.It becomes a positive ion and its radius increases.It becomes a negative ion and its radius increases.It becomes a negative ion and its radius decreases.30s
- Q5Which substance is an ionic compound?DABC30s
- Q6How many electrons are contained in an Au3+ ion?79768219730s
- Q7Which electrons are represented by all of the dots in the diagram shown?the carbon and hydrogen valence electronsall of the carbon and hydrogen electronsthe carbon valence electrons, onlythe hydrogen valence electrons, only30s
- Q8Which compound contains both ionic and covalent bonds?CH2OPCl3CaCO3MgF230s
- Q9A substance that does not conduct electricity as a solid, but does conduct electricity when melted is most likely classified as…molecularionicmetalnonmetal30s
- Q10An unknown element X can form a compound with the formula XBr3. In which group on the Periodic Table would element X be found?group 18group 13group 15group 130s
- Q11Which equation shows a conservation of mass?PCl5 --> PCl3 + Cl2Al + Br2 --> AlBr3Na + Cl2 --> NaClH2O --> H2 + O230s
- Q12Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?sodium oxidemagnesium oxidesodium chloridemagnesium chloride30s
- Q13What is the total number of moles in 80.0 grams of C2H5Cl (that's chlorine at the end of the formula)0.81 moles1.00 moles1.24 moles2.00 moles30s
- Q14What property is NOT associated with covalent compounds?low melting pointsoftbrittlepoor conductor when dissolved in water30s
- Q152H2 + O2 --> 2H2O If you use 8 grams of hydrogen to produce 72 grams of H2O, how much O2 is needed?16 g O280 g O264 g O256 g O230s