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Chemistry Exam 2: Lewis Structures, Formulas, and Empirical Formulas, Exams of Chemistry

Cerritos CollegeChemistry

A chemistry exam focusing on drawing Lewis structures, writing formulas, and determining empirical formulas for various compounds. Students are required to answer questions related to nitrates, chlorites, carbonic acid, carbon tetrafluoride, calcium phosphate, aluminum sulfate, copper(I) carbonate, ferrous hydroxide, nitric acid, zinc bicarbonate, potassium sulfate, hydrogen sulfate, nickel iodide, iodine trichloride, cadmium dichromate, and ammonium phosphate. Problems include calculating moles of elements, molecules of compounds, and grams of elements given masses, as well as determining empirical formulas and identifying the Lewis dot structures and electron configurations of various elements.

What you will learn

  • Which element has the highest electronegativity: F or I?
  • What is the name for (NH4)2HPO4?
  • Which element has the largest atomic radius: Na or Cl?
  • Which element has the highest ionization energy: Mg or S?
  • What is the name for H2SO3(aq)?
  • Draw the Lewis dot structure for Se and Si.

Typology: Exams

2018/2019

Uploaded on 02/11/2022

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eknathia 🇺🇸

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Chem. 110 Name _______________________________
Fall 05 Practice EXAM 2 (Last) (First)
Part 1
1. Draw the Lewis Dot Structure for each of the following (12 points)
a. nitrate _________________________
b. chlorite _________________________
c. carbonic acid _________________________
d. carbon tetra fluoride __________________________
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Download Chemistry Exam 2: Lewis Structures, Formulas, and Empirical Formulas and more Exams Chemistry in PDF only on Docsity!

Chem. 110 Name _______________________________ Fall 05 Practice EXAM 2 (Last) (First)

Part 1

  1. Draw the Lewis Dot Structure for each of the following (12 points) a. nitrate _________________________ b. chlorite _________________________ c. carbonic acid _________________________ d. carbon tetra fluoride __________________________ /
  1. Write the formula for each of the following (12 points) a. calcium phosphate _________________________ b. aluminum sulfate _________________________ c. copper (I) carbonate _________________________ d. ferrous hydroxide _________________________ e. nitric acid _________________________ f. zinc bicarbonate _________________________
  2. Write the Name for each of the following (12 points) a. K 2 S 2 O 3 _________________________ b. H 2 SO 3 (aq) _________________________ c. NiI 3 _________________________ d. ICl 3 _________________________ e. CdC 2 O 4 _________________________ f. (NH 4 ) 2 HPO 4 _________________________ / /24pts.
  1. A 11.17 g sample of metal is reacted with excess oxygen to produce 15.97 g of the oxide MO 2. What is the molar mass of element M. (8 points) Answer: ________________________
  2. A 2.00g sample of lithium metal is burned in oxygen atmosphere to produce 4.31 g of a lithium-oxygen compound. Determine the compound’s empirical formula. (9 points) Answer: ________________________ /
  1. (12 points) A 3.750 g sample of the compound responsible for the odor of cloves contains only C, H, and O. It is burned in a combustion chamber. The mass of CO 2 produced is 10.05 g, and the mass of water produced is 2.470 g. What is the empirical formula of phenol? Answer: ________________________ 9.The percent of aluminum in the compound Al 2 X 3 is 18.56%. What is the molar mass of the element represented by X?? (10 points) Answer: ________________________ /22pts.