AH_Practice_MiniExam

AH_Practice_MiniExam - Chem 6AH Fall 2004 Name:_ Mini-Exam...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 6AH Fall 2004 Name:_______________________ Mini-Exam Chapters 1 and 2 (Wed 2) UCSD ID:______________________ Directions: You have 50 minutes to complete this exam. The first question is to be completed on this paper. On the back you will find six multiple choice questions; the answers to these go ON YOUR SCANTRON. Both this exam and the scantron are to be turned in at the end of the period. I. (15 pts) A 1.964-g sample of phosphorus is heated in oxygen; at the end of the reaction, 4.500 g of an oxide of phosphorus is obtained. The molecular weight of this material is determined to be somewhere between 130 and 150 g/mol. Calculate the empirical and molecular formula of the oxide. Multiple Choice: 6 points each 1. Lead (II) nitrate is a poisonous substance which has been used in the manufacture of special explosives and as a sensitizer in photography. Calculate the mass of lead in 139 g of Pb(NO 3 ) 2 .
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/30/2008 for the course CSE 3 taught by Professor Ord during the Fall '08 term at UCSD.

Ask a homework question - tutors are online