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Calcium Oxide Magnesium Oxide 15. Calcium oxide, CaO, has a lower melting temperature than magnesium oxide, MgO, due to the (A) higher charge density of Mg2+ than of Ca? (B) higher charge density of Ca2 than of 0?- (C) greater atomic volume of Mg than of O2- (D) greater atomic volume of Mg than of Ca+

Calcium Oxide Magnesium Oxide 15. Calcium oxide, CaO, has a lower melting temperature than magnesium oxide, MgO, due to the (A) higher charge density of Mg2+ than of Ca? (B) higher charge density of Ca2 than of 0?- (C) greater atomic volume of Mg than of O2- (D) greater atomic volume of Mg than of Ca+

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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19. Determine the pH of a 0.10 M solution of a base, B, with a K of 1.0 x 10 (A) 3.00 (B) 6.00 (C) 8.00 (D) 11.00 Calcium Oxide Magnesium Oxide 15. Calcium oxide, CaO, has a lower melting temperature than magnesium oxide, MgO, due to the (A) higher charge density of Mg2+ than of Ca? (B) higher charge density of Ca than of 0?- (C) greater atomic volume of Mg2+ than of O2- 20. Isotopic forms of the same element (A) differ in the number of neutrons (B) are formed by gaining electrons (C) always have a positive charge (D) have the same number of neutrons 21. The number of moles of oxygen atoms in one mole of iron(II) phosphate is (A) 2 (B) 3 (C) 4 (D) 8 (D) greater atomic volume of Mgt than of Ca2+ 16. The equilibrium system not affected by the pressure change which results from a volume change at constant temperature is (A) 2 O3(g)= 3 Oz(g) (B) PCI(g) =PCL(g) + Cl2(g) (C) H2(g) + Iz(g)= 2 HI(g) (D) 2 NO2(g) = N2Olg) 22. Magnesium fluoride, a salt of low solubility in water, has a K, of 6.4 x 109. The concentration of Mg ions in this solution would be (A) V6.4x10 M (B) (6.4x 10 /2)M (C) (6.4x10 /3)M (D) (6.4x10 /4)M 17. A solution of 50.0 mL of 0.0010 M Ba(OH)2 is slowly titrated with 50.0 mL of 0.0030 M H2SO.. The conductivity of this solution will (A) decrease to near zero, then increase (B) decrease to near zero and remain very low (C) increase as the acid is added then become constant at a high value (D) increase as the acid is added and then slowly become very low 18. Which of the following pairs illustrates the law of multiple proportions? (A) SO2, SO (B) CO2, CCI4 (C) NaCl, NaBr (D) NH,CI, NH,Br
Transcribed Image Text:19. Determine the pH of a 0.10 M solution of a base, B, with a K of 1.0 x 10 (A) 3.00 (B) 6.00 (C) 8.00 (D) 11.00 Calcium Oxide Magnesium Oxide 15. Calcium oxide, CaO, has a lower melting temperature than magnesium oxide, MgO, due to the (A) higher charge density of Mg2+ than of Ca? (B) higher charge density of Ca than of 0?- (C) greater atomic volume of Mg2+ than of O2- 20. Isotopic forms of the same element (A) differ in the number of neutrons (B) are formed by gaining electrons (C) always have a positive charge (D) have the same number of neutrons 21. The number of moles of oxygen atoms in one mole of iron(II) phosphate is (A) 2 (B) 3 (C) 4 (D) 8 (D) greater atomic volume of Mgt than of Ca2+ 16. The equilibrium system not affected by the pressure change which results from a volume change at constant temperature is (A) 2 O3(g)= 3 Oz(g) (B) PCI(g) =PCL(g) + Cl2(g) (C) H2(g) + Iz(g)= 2 HI(g) (D) 2 NO2(g) = N2Olg) 22. Magnesium fluoride, a salt of low solubility in water, has a K, of 6.4 x 109. The concentration of Mg ions in this solution would be (A) V6.4x10 M (B) (6.4x 10 /2)M (C) (6.4x10 /3)M (D) (6.4x10 /4)M 17. A solution of 50.0 mL of 0.0010 M Ba(OH)2 is slowly titrated with 50.0 mL of 0.0030 M H2SO.. The conductivity of this solution will (A) decrease to near zero, then increase (B) decrease to near zero and remain very low (C) increase as the acid is added then become constant at a high value (D) increase as the acid is added and then slowly become very low 18. Which of the following pairs illustrates the law of multiple proportions? (A) SO2, SO (B) CO2, CCI4 (C) NaCl, NaBr (D) NH,CI, NH,Br
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