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Unformatted text preview: 3 III. 6.02 × 10 23 formula units of ammonia chloride O C O C H H N H H H 1 2 3 C C C C C C H Cl H Cl H Cl C C C C C C C O O H H H H H H 1 2 3 C C C C C C H H H H H H CHEM 110 Recitation 6 7. Estrogen (estriol) is a steroid that has the formula C 18 H 24 O 3 . A. What is the mass of carbon in a 50 g sample of estrogen? B. How many moles of estrogen are in the 50 g sample? C. How many atoms are in a 3.0 mg sample of estrogen? 8. Alum used in cooking is a hydrate of potassium aluminum sulfate KAl(SO 4 ) 2 • x H 2 O. If 4.74g of alum is heated, the dehydrated compound that remains weighs 2.58g. What is the value of x in the formula for alum? 9. Fill out the table below for the molecules or ions given. (Be sure to draw the Lewis structures. Molecule or ion Electron Domain geometry Molecular geometry ICl 2 + ICl 3 IO 4 – I 3 – IF 5 IF 4 +...
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This note was uploaded on 01/18/2012 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.
 Fall '08
 HOFMANN,BRUCEROB
 Mole

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