Madison Farrish 9/22/06 chemsitry p. 6
Answer the following fully and completely using nouns, verbs, and ly-words.
1. Complete the table using your Periodic APP or the 50th
Year of ChemEd table.
2. Determine the density of the block that Mr. Young assigns you.
V= 7.6*12.7*2=193.04 cm^3
M= 144 g
144/193.04= .74 g/cm^3
I had the Blank Index Cards, and the density of them is .74 g/cm^3. I got the density by dividing the mass—144g--- by the volume---193.04cm^3.
3. If the Lead Brick was really Gold – How heavy would it be? Give the answer in 4 different units.
11.34 g/cm^3 is the density of lead.
The density of gold is 19.3.
Volume of lead is 395.92cm^3
19.3* 395.92^3= 1197787100 gà 2.640669E6 lbmà1.197787E6 kgà 8.207449E4 slug à 1.320334E3 ton
I got these answers by using the unit converter on my calculator.
4. We are interested in the amount of lead in 55 cans of paint. There should be 0.047 centigrams of lead in each can. Each can has a mass of 0.023 slugs. If we perform a T-Test on the data collected from these cans, at what Level of Significance would you test? Why?
I think it would have a level of significance .04, because the amount of lead in the paint is very important, because lead can be very deadly or toxic. For example, if I painted my fence and my dog came up and licked it a lot, it would die if the lead in the paint wasn’t equal to the amount it needed to be. That’s how toxic lead is.
5. Determine the ppb of lead for the paint in question 4.
First you convert .047 centigrams into grams and .023 slugs into grams. So now I have .00047 grams from my centigrams, and 3.356598E2 g from my slugs. So know you dive .00047g by 335.6598 and times it by a billion.
1.400227254E-6 * 1000000000= 1400.23. The ppb for lead in question 4 is 1400.23
6. Convert these and fill the table
I used the unit converter in my calculator to figure this out.
7. ROSES and BEARS: Use screen shots of each to explain the relationship between Roses/Petals/Roots and Bears/Fish. [Just compare one pair.] I think both roses and fish are alike. To find roses, you look at the middle of the dice to see if there is a middle dot, and if there is one then that dice is a rose. You also look to the middle of the dice when looking for fish. If there is a dot then you look to the right and left of the dot and count how many dots aren’t there.
8. Using the LEAD list, perform a T-Test using the LOS from question 4. Report the results and your conclusion(s).
- After I did the T-test I compared the answer I got p= .0278 to the level of significance I chose, .04. This means that I would accept the amount of lead in each paint-can, because .0278 is lower than the level of significance I chose. [20/20] sweet!]