Mid Term: SHOW YOUR WORK
Multiple Choice: One point each
The nucleus of an atom consists of
electrons and neutrons
electrons and protons
protons and neutrons
All of the above
The number of moles of solute present in 1 LITER of a solvent is called
Multiple Choices (Choose the best answer.
Compare the volumes and densities of 10 g and 50 g pieces of lead.
The 10 g piece would have a smaller volume and a smaller density than the 50 g piece.
The 10 g piece would have a smaller volume but a larg
December 1, 2014
Data Analysis Paper
The most important greenhouse gases in Earths atmosphere include carbon dioxide, CO 2,
methane, CH4, nitrous oxide NO2, water vapor, H2O, and ozone, O3. The common char
Professor Vanina Guidi
December 6, 2014
Hydrogen fuel cells are predicted to widen the hole in the ozone layer.
A new technology that is being developed that does not use fossil fuels is hydrogen fuel cells. A
Answer these questions: Show your work
1. Determine the ions and write the correct chemical formula for the ionic compound formed between
Magnesium and oxygen.
2. Identify the following compound as ionic or covalent polar or
Final Exam Chm 121
Please show all your work
Highlight answers in exam
Submit file in Assignment Folder by Dec 14 th, 11:59 pm , EST
1. All of the following are true except:
An ion has a positive or negative charge.
Metals tend to form posi