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How many grams of CaCl2 are needed to make 968.1 g of a solution that is 35.5% (m/m) calcium chloride in water? (Note that m/m has the same meaning as w/w.)
How many grams of water are needed to make this solution?
From the plots of the boiling point versus the volume of distillate in the simple distillation experiments, what can you conclude
A 5.325g sample of methyl benzoate, a compound found in perfumes, was found to contain 3.758g of carbon, 0.316g of hydrogen, and 1.1251g of oxygen.
What volume of 0.2500 M cobalt(III) sulfate is required to react completely with a) 25.00 mL of 0.0315 M calcium hydroxide?
For each of the pairs of elements below give the formula for the simplest compound to be formed from them and explain the basis of your decision and note if the bond
A solution containing a mixture of metal cations was treated with dilute HCl and a precipitate formed. The solution was filtered and H2S was bubbled through the acidic solution.
When NH3 is prepared from 28 g N2 and excess H2 the theoretical yield of NH3 is 34 g. When this reaction is carried out in a given experiment, only 30. g is produced.
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
At constant volume, the heat of combustion of a particular compound is -3973.0 kJ/mol. When 1.481 g of this compound (molar mass = 172.71 g/mol)
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.740 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane
How long would it take for a radioactive isotope with a half life of 2 weeks to lose at least 70% of its radioactivity? Describe two clinical uses of Radioactivity.
What would you use to prepare a buffer system with a pH of around 4.2. What would you use to make a buffer with a pH of around 9.2? Describe the process you used to choose the correct buffer for each pH.
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25°C.
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