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WorksheetsLBC Chapter 14 Quiz
Total questions: 10
Worksheet time: 50mins
Reorder the following substances from least to MOST toxic.
table salt
(LD50 = 3000 mg/kg)
cola (LD50 = 140 mg/kg)
paraquat
(LD50 = 100 mg/kg)
nicotine
(LD50 = 9 mg/kg)
How many milligrams of paraquat (LD50 = 100 mg/kg) would be lethal to a 220-pound man? (2.2 lb = 1kg).
Give you answer rounded to the nearest tenth.
Make sure to show your work for full credit!
(a)
How many atoms are there in 1 mole of H2SO4?
6.02 x 1023
1.806 x 1024
3.612 x 1024
4.214 x 1024
Reorder the following substances from highest to lowest number of oxygen atoms:
1 mole H2O
2 moles H3PO4
3 mol O2
1 mol H2O2
I mol H2O2
Calculate the molar mass of hydroxylamine, NH2OH. Round your answer to the nearest hundredth. Make sure to show your work for full credit!
(a)
Calculate the molar mass of phosphorus trichloride, PCl3 . Round your answer to the nearest hundredth. Make sure to show your work for full credit!
(a)
How many moles of calcium, Ca, are in 100 grams of CaCl2?
0.90 mol Ca
1.11 mole Ca
40.070 mol Ca
11098 mol Ca
The LD50 for caffeine is 140 mg/kg. Would you consider caffeine to be more
or less toxic than arsenic (LD50 = 15 mg/kg)? Explain.
You can type your answer or write on paper and upload.
Which element has a molar mass of 183.84 g/mol?
tungsten
antimony
platinum
lithium
How many grams of hydrogen, H, are in 2 moles of water, H2O? Round your answer to the nearest hundredth.
Show all work in order to get full credit!
(a)
