Last modified: Tue 10/01/2013 09:50:38 pm

Oklahoma State University

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


The BCE must be completed before class starts, for this BCE class has already met. It will not count towards your BCE total. NOTE: If class has not started and you receive this message, go ahead and do the BCE, I'll still count it.

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1. Write the formula and the name of the compound formed when the following substances are combined. (NOTE: Input fields can not correctly display subscripts or superscripts. So the formula H2O can only be entered as H2O.)

Elements

Formula

Name

Ba and Br

Na and S

Mg and N

 

2. Complete the following table with as many answers as you can.

Name of Substance

Formula of Substance

potassium chlorate

Na3PO4

HF(g)

calcium carbonate

heptane

CoCl2

dinitrogen tetroxide

3. Balance the following equations;

a) Fe(s) + H2O(l) ----> Fe3O4(s) + H2(g)

b) N2(g) + Cl2(g) ----> NCl3(g)

4. Determine the formula weight of each of the following substances in atomic mass units.

a) C amu

b) O2 amu

c) C8H18 amu

5. According to our discussion in Chapter 2 the atomic mass unit (amu) is related to grams in the following way;

1 amu = 1.66054 x 10-24 g

Using this relationship calculate the mass, in grams, of;

a) a hydrogen atom who has an RWAAM of 1.00794 amu; g

b) a molecule of Cl2 with a formula weight of 70.90 amu; g

c) a formula unit of NaCl with a formula weight of 58.43 amu; g

6. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

7. If there is one question you would like to have answered in lecture, what would that question be?