Chem 1331 - final (better)

Chem 1331 - final (better) - View Attempt 1 of 16

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Magnesium oxide (MgO) forms when the metal burns in air. If 1.25 g of MgO contains 0.754 g of Mg, what is the mass ratio of magnesium to oxygen in the compound? Student Response Value Correct Answer Feedback a. 1.52 100% b. 1.66 0% c. 0.603 0% d. 0.340 0% e. 2.52 0% f. 0.659 0% Score: 1/1 2. Naturally occurring argon consists of three isotopes, the atoms of which occur in the following abundances: 0.34% 36 Ar (35.9676 amu), 0.07% 38 Ar (37.9627 amu), and 99.59% 40 Ar (39.9624 amu). The calculated atomic weight of argon is: Student Response Value Correct Answer Feedback a. 39.95 amu 100% b. 37.96 amu 0% c. 38.96 amu 0% d. 39.64 amu 0% e. none of the above 0% Score: 1/1 3.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What is the sum of the numbers of neutrons and electrons in the ion 207 Po 3- ? Student Response Value Correct Answer Answer 210 100% 210 Score: 1/1 4. The formula of calcium oxide is CaO. What is the formula of the ionic compound containing calcium and sulfate ions? Student Response Value Correct Answer Feedback a. CaSO 4 100% b. Ca 2 SO 4 0% c. Ca 3 (SO 4 ) 2 0% d. Ca 2 (SO 4 ) 3 0% e. none of these 0% Score: 1/1 5. Give formulas for the following compounds: chlorine trifluoride and pentaphosphorus heptasulfide Student Response Value Correct Answer Feedback a. ClF 3 , 5PS 7 0% b. ClF 3 , P 5 S 7 100% c. Cl 3 F, P 3 S 9 0% d. Cl 3 F 3 , P 5 S 7 0% e. ClF 3 , PO 5 S 7 0% Score: 1/1 View Attempt https://scholar.uh.edu/webct/urw/lc222453510.tp222453522/ViewStudent. .. 2 of 16 12/14/2008 10:01 PM
Background image of page 2
6. What is the empirical formula and empirical formula mass for the following compound? gallium(III) sulfate Student Response Value Correct Answer Feedback a. Ga 2 (SO 4 ) 3 , 427 g/mol 100% b. Ga(SO 4 ) 2 , 262 g/mol 0% c. Ga(SO 4 ) 1.5 , 214 g/mol 0% d. Ga 2 (SO 4 ) 3 , 363 g/mol 0% e. Ga(SO 4 ) 3 , 358 g/mol 0% Score: 0/1 7. What volume of 0.150 M AgNO 3 solution is required to react with excess KCl(aq) to yield 37.5 g of silver chloride? Student Response Value Correct Answer Feedback a. 570 mL 0% b. 1.70 L 100% c. 2.60 L 0% d. 3.30 L 0% e. 3.66 L 0% Score: 1/1 8. Sodium phosphate (Na 3 PO 4 ) reacts with HCl to form H 3 PO 4 and NaCl. How many liters of 0.1 M HCl are required to react with 0.1 mole of sodium phosphate? Student Response Value Correct Answer Feedback a. 0.3 L 0% View Attempt https://scholar.uh.edu/webct/urw/lc222453510.tp222453522/ViewStudent. .. 3 of 16 12/14/2008 10:01 PM
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
b. 0.6 L 0% c. 1.0 L 0% d. 3.0 L 100% Your choices were: A. 0.3 L B. 0.6 L C. 1.0 L D. 3.0 L Score: 1/1 9. How many moles of H + ions are present in the following aqueous solution? 1,796 mL of 0.87 M nitric acid
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/17/2011 for the course CHEM 1372 taught by Professor Staff during the Spring '08 term at University of Houston.

Page1 / 16

Chem 1331 - final (better) - View Attempt 1 of 16

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online