1. Which of these is a mixture?
Uranium Table Salt (NaCl) Iron Steel Water

2. Which of these has 23 protons?
Scandium Titanium Vanadium Chromium None of these

3. How many significant figures: 1.003080
Answer:

4. Convert 236 torr to atm.
Answer:

5. Which of these is a pure substance?
Blood Ocean Brass Wine Table Salt (NaCl)

Name:
E-mail:


Last 15 Challengers
*

news | about us | contact us
tutorials index | organic chemistry | practice tests | online quizzes | reference tools
site copyright (c) 2002 to neopages.com