Chem 130: Exam Two
Wednesday, March 23, 2011
Answer all questions. Each question carries four (4) points (Total points = 100); paper A
1) What is the formula for an ionic compound made of magnesium and sulfur?
E) none of th
Chem 130: Exam one (Practice Test)
Answer all questions. Each question carries equal points (Total points = 100)
1) The correct scientific notation for the number 0.00050210 is:
A) 5.0210 x 104
B) 5.021 x 10-4
C) 5.021 x 104
D) 5.0210 x 10-4
E) none of th
Write the electron configuration and draw the Lewis Dot Structure for P.
Drawthe Lewis Dot structure forthe ioniccompound Li2S.
Drawthe Lewis Dot structure forthe covalent compound oF
A 3.52g sample of chromium metal reacts with fluorine to produce 7.38g of metal
fluoride. What is the mass % of Cr in the metal fluoride?
=b=:.= u# pr=diffkyaled-er`La
Lecture 3 and 4
Classify each of the following as physical property, physical change,
chemical change, or none. (Use PP, PC, CP, CC in the blanks below)
Digesting food c=c
Chem 130: Exam one Practice Test
1) Which statement about the scientific method is TRUE?
A) The scientific method emphasizes reason as the way to understand the world.
B) The scientific method emphasizes observation and reason as the way to understand t
CHEMISTRY 1710 - Practice Exam #2 -Answers (KATZ)
Section 1 - This section of the exam is multiple choice. Choose the BEST answer
from the choices which are given and write the letter for your choice in the space
provided. All questions are equally weight
Lecture 1 and 2
How manysig. figs. Inthe following numbers:
0.000297008 x 10-7.
Round the number to 4 sig. figs. : 77,450,912.7
7 7 of . I a+
Calculate usingthe correctsig. fi