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| 1 |
Select the correct name for KBr: |
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phosphorous bromide |
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potassium bromide |
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potassium bromate |
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calcium bromide |
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None of the previous answers. |
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| 2 |
Select the correct name for Cu2O: |
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copper(II) oxide |
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cupric oxide |
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dicopper monoxide |
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copper(I) oxide |
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None of the previous answers. |
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| 3 |
Select the correct name for Fe(NO3)3: |
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ferrous nitrate |
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iron(II) nitrate |
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iron(III) nitrite |
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ferric nitrite |
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None of the previous answers. |
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| 4 |
Select the correct name for NH3: |
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ammonia |
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ammonium hydroxide |
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ammonium |
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pneumonia |
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None of the above answers. |
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| 5 |
Select the correct name for N2O: |
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nitrogen oxide |
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nitrogen(II) oxide |
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dinitrogen monoxide |
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dinitrogen oxide |
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None of the previous answers. |
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| 6 |
Select the correct name for Sn(SO4)2: |
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tin(IV) sulfate |
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tin(II) sulfite |
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tin(II) sulfate |
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sodium sulfate |
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None of the previous answers. |
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| 7 |
Select the correct name for HNO2(aq) |
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nitric acid |
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hydrogen nitrate |
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hydronitrous acid |
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nitrous acid |
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None of the previous answers. |
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| 8 |
Select the correct name for Al2S3: |
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aluminum sulfite |
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aluminum sulfide |
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aluminum sulfate |
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dialuminum trisulfide |
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None of the previous answers. |
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| 9 |
Select the correct name for Ca(OH)2 |
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calcium oxide |
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californium hydroxide |
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calcium hydroxide |
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carbon hydroxide |
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None of the previous answers. |
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| 10 |
Select the correct name for H3PO4: |
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phosphorous acid |
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hydrophosphoric acid |
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perphosphoric acid |
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phosphoric acid |
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None of the previous answers. |
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| 11 |
Select the correct name for Ag2SO4 |
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silver sulfate |
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silver(II) sulfate |
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silver sulfite |
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mercury(I) sulfate |
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None of the previous answers. |
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| 12 |
Select the correct name for
(NH4)2Cr2O7: |
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ammonium chromate |
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ammonium dichromate |
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ammonia dichromate |
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ammonium oxalate |
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None of the previous answers. |
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| 13 |
Select the correct name for NaHCO3: |
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sodium carbonate |
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sodium oxalate |
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sodium dicarbonate |
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sodium acetate |
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None of the previous answers. |
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| 14 |
Select the correct name for Cu(IO3)2: |
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copper(II) iodate |
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copper(I) iodide |
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copper(II) iodite |
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cuprous iodate |
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None of the previous answers. |
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| 15 |
Select the correct name for P4O10: |
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phosphorous oxide |
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potassium oxide |
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tetraphosphorous decaoxide |
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phosphorous(V) oxide |
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None of the previous answers. |
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| 16 |
Select the correct name for KMnO4: |
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potassium manganate |
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potassium permanganate |
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phosphorous permanganate |
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potassium magnesium oxide |
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None of the previous answers. |
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| 17 |
Select the correct name for Sr(CN)2: |
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silver cyanide |
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strontium dicyanide |
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strontium acetate |
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strontium cyanide |
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None of the previous answers. |
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| 18 |
Select the correct name for Li2CO3: |
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lithium carbonate |
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lithium oxalate |
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dilithium carbonate |
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lithium acetate |
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None of the previous answers. |
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| 19 |
Select the correct name for Co(NO3)2: |
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cobalt nitrite |
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cobaltic nitrate |
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cobalt(II) nitrite |
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cobalt(II) nitrate |
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None of the above answers. |
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| 20 |
Select the correct name for HC2H3O2: |
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oxalic acid |
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acetic acid |
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carbonic acid |
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acetous acid |
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None of the previous answers. |
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| 21 |
To find literature values of properties of compounds, the internet has become an important alternative to handbooks. The internet contains compilations of MSDS (material safety data sheets) that must accompany shipments of all chemicals. These safety sheets give physical properties of the compounds as well as toxicological and safety information and sometimes uses. To locate sites that contain MSDS
compilations and other information, six of the best sites are:
http://www.chemexper.com/
http://www.sigmaaldrich.com/
http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
http://www.chemspider.com/SimpleSearch.aspx
http://hazard.com/msds/
http://www.chemicalbook.com/
For the questions that follow, use the sites above to find the information that helps to answer the question. What are the melting and boiling points of ethylene glycol? |
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0oC, 100oC |
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-13oC, 111oC |
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-13oC, ~196oC |
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0oC, 196oC |
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None of the previous answers. |
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| 22 |
Ethylene glycol is usually the primary ingredient in commercial antifreeze products for cars. It is mixed with the water in a radiator because: |
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The mixture has a lower freezing point than water. |
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It is a better refrigerant than water. |
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The mixture has a higher boiling point than water. |
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Both A and C. |
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None of the previous answers. |
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| 23 |
Using the sites (hint: probably Chemfinder), find the solubility of MTBE (methyl t-butyl ether) in water. |
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1 g/100 mL |
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5.1 g/100 mL |
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insoluble |
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0.01 g/100 mL |
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None of the previous answers. |
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| 24 |
MSDS often have toxicogical data that includes LD50 values. The LD50 value represents the number of mg/kg (usual units) of body weight that will be lethal to 50% of the population of the animals tested. For instance, the oral LD50 values for rats for the relatively nontoxic sodium chloride and the extremely toxic sodium cyanide are 3000 and 6.4 mg/kg respectively. From the sites listed in #21, find the oral-rat LD50 in mg/kg for aspirin (acetylsalicylic acid). |
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200 mg/kg |
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1010 mg/kg |
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2 g/kg |
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None of the previous answers. |
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| 25 |
Using the answer to #24, it is possible to get a very approximate value for the amount that could kill half the populations of humans by
multiplying the value by a typical human weight of 65 kg. This assumes that rats are good models for humans which is often not the case. Making this assumption, what is the LD50 value for a 65 kg humans for aspirin. |
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200 grams |
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200 mg |
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13 grams |
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None of the previous answers. |
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| 26 |
Regular strength tablets contain 325 mg of aspirin. Making the assumptions of #25, how many tablets could kill half the population of humans? |
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13 tablets |
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40 tablets |
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0.025 tablets |
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4.2 tablets |
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None of the previous answers. |
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| 27 |
From the sites listed in #21, find the oral-rat LD50 in mg/kg for caffeine. |
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127 mg/kg |
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224 mg/kg |
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192 mg/kg |
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None of the previous answers. |
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| 28 |
The average cup of coffee contains about 100 mg of
caffeine. How many cups of coffee could potentially be lethal to half of the drinkers (assume a 65 kg human and that the LD50 value for rats applies to humans and that 2 significant figures can be used)? |
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120 cups |
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3400 cups |
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1.2 cups |
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34 cups |
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None of the previous answers. |
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| 29 |
Recognizing that the answer to #28 depends on many assumptions and has a large margin of error, is the very sad and unfortunate story reported at
http://the-tech.mit.edu/V118/N56/shorts.56n.html
and/or
http://www.erowid.org/chemicals/caffeine/references/media/1998_missouri_1.shtml
surprising? |
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Yes. Because the difference of the values is much larger than the margin of error. |
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No. Considering the assumptions especially using the value for a rat for humans, the equivalent of 250 cups is fairly close to the calculated value of 120 cups. |
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| 30 |
Rank the three compounds, caffeine, nicotine and Vitamin D2 from most to least toxic on the basis of oral-rat LD50 values. |
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nicotine, caffeine, vitamin D2 |
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nicotine, vitamin D2, caffeine |
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vitamin D2, caffeine, nicotine |
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vitamin D2, nicotine, caffeine |
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None of the previous answers. |
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