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What is the charge of Zn in the compounds ZnCl 2, Zn(OH) 2 and ZnF 2

What is the charge of Zn in the compounds ZnCl 2, Zn(OH) 2 and ZnF 2. A 1+ B 2 + C 3 + D 4 +. How many significant digits are in the measurement .002345. A 4 B 6 C 5 D 1. Isotopes of an element differ from each other by their:. a. number of protons b.number of neutrons

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What is the charge of Zn in the compounds ZnCl 2, Zn(OH) 2 and ZnF 2

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  1. What is the charge of Zn in the compounds ZnCl2, Zn(OH)2 andZnF2 • A 1+ • B 2 + • C 3 + • D 4 +

  2. How many significant digits are in the measurement .002345 • A 4 • B 6 • C 5 • D 1

  3. Isotopes of an element differ from each other by their: • a. number of protons b.number of neutrons • c. atomic numbers d. all of the above

  4. What are the products of the following reaction? KOH + NaCl • A Cl2 and NaKOH • B KCl and NaOH • C NaK and HOCl • D H2 and NaCl

  5. What are the products of a combustion reaction? • A CO + energy • B CO2 + H2O • C CO2 + H2O + energy • D CO3 + H2

  6. What is the molar mass of Al(OH)3 A52.38 g/mol B 77.98 g/mol C. 43.98 g/mol

  7. How many grams of aluminum chloride are produced when 32.0g of Al react with an excess of HCl? (Hydrogen gas is the other product) • 158 g of AlCl3 • 316 g of AlCl3 • 76.0 g of AlCl3

  8. When aluminum metal is placed in copper(II) nitrate, a single replacement reaction occurs. If the solution is made by dissolving 52.5g of copper(II) nitrate in water, and 2.7g of aluminum is placed in the solution: • How many grams of copper metal will be produced? • 19 g Cu • 9.5 g Cu • 18 g Cu

  9. What volume is occupied of 5.6 g of Cl2 gas at STP? • A. 1.8 L • B .90 L • C 2.6 L • D 3.2 L

  10. A solution is made by dissolving 4.0 g of NaOH in enough water to make a 2.00 L solution. What is the molarity? • A .24 M • B .050 M • C .012 M • D .04 M

  11. Select the correct electron configuration for the ion, O2- • a) 1s21p62s2 b) 1s22s22p5 • c) 1s22s22p4 d) 1s22s22p6

  12. Consider the unbalanced equation: Na(s) + Cl2(g)  NaCl(s). What mass of NaCl can be produced from 25.0 g of Cl2 and excess Na? • A 41.2 g • B 82.4 g • C 20.0 g

  13. What is the name of the following molecule?PCl5 • A Phosphorous Chloride • B tetraChloroPhosphorous • C Phosphorous tetrachloride • D Phosphorous pentachloride

  14. An ideal gas occupies a certain volume at .964 atm and 27 degrees C. If the pressure is reduced to .765 atm what will the temperature have to be to keep the volume constant • A. 380 KB. 378 KC. 200 KD. 210 K

  15. What intermolecular forces are present in H2 • A Dipole Dipole • B Ionic • C Dispersion Forces • D.Hydrogen bonding

  16. What is the name of the following compound? Na2CrO4 • A. Sodium Chloride • B. Sodium Carbonate • C Sodium Chromate • D sodiumdicarbonatetetraoxide

  17. What is the name of the family that includes Fluorine, Chlorine and Bromine? • a. Halogens b. Alkaline metals • c. Alkali metals d. Alkaline earth metals

  18. What is the final temperature of a system prepared by placing a 100.0 g sample of hot copper metal originally at 98.8 C into 100.0 0 g of water at 25.0 degrees C? • A. 20.1 degrees C • B 45.1 degrees C • C 31.2 degrees C

  19. A compound contains .52g of Oxygen and .67g of Phosphorous. What is the empirical formula? • A. P2O3 • B. P2O • C. P4O8 • D. P2O5

  20. If the molar mass of the compound is 219.88 g/mol what is the molecular formula? • A. P4O • B. P8O4 • C P2O • D P4O6

  21. What is the empirical formula of the compound that contains 3.10 g P and 10.64 g Cl? • A. PCl3 • B. PCl • C. P2Cl5

  22. Predict the products and write the equation for the following: • Solid Copper reacts with aqueous silver Nitrate

  23. Draw the lewis dot structure for NH4Cl

  24. Draw the lewis dot structure for H2SWhat shape is the molecule?Is the substance polar or non polar?What intermolecular forces are present?

  25. Draw the lewis structure and determine the shape for CO2

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