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A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.374 g sample was studied by combustion analysis, 0.671 g of CO2 and 0.0909 g of H2O formed. How many moles of each of the following were in the original sample?
The pressure and colume are simultaneously increased so that at every instant P and v are related by the equation, P = Av, where A is a constant.
White phosphorus is a molecular solid made of molecules of P4. A 3.88 g sample of white phosphorus starts at 24oC. Calculate the amount of heat (in J) required to melt the sample.
I need help in describing the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
What types of bonds are responsible for the secondary structure of a protein? How would the addition of a heavy metal affect the secondary structure of a protein?
If 2.3g of sodium reacted with 1.8 of water, what would be the total mass of sodium hydroxide and hydrogen produced?
What molar ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 5.20? [Ka(C6H5COOH) = 6.5 * 10-5]
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
Determine how many grams of sodium chloride are required to prepare 250. mL of this solution. (if given the density of the saline solution is 1.0 g/mL)?
A solution of NaOH(aq) contains 11.6 grams of NaOH in 129 mL of solution. Calculate the pH at 25C.
A chemist dissolves 0.099 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 36.1-mL sample of this solution
A 184-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
A 499 mL sample of solution contains 32.0 g of CaCl2 Calculate the molar concentration of Cl - in this solution
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