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The label on bottle of a multi-vitamin tablets states that one tablet contains 17.0 mg of thiamine. You weigh a tablet on a laboratory balance and determine that the mass is 0.810 g. What is the percentage (mass/mass)of thiamine in one tablet? (Hint: Make sure to convert your masses to the same unit.) %
Ethyl alcohol is soluble in water because of the OH group. Can you use extraction to separate benzoic acid from ethyl alcohol it is dissolved in?
0.015 M solution of hydrogen cyanate (HOCN) has a pH of 2.67. What is the hydronium ion concentration in the solution and the ionization constant, Ka, for the acid
how would an applied chemist utilize a theortical molecular reaction that had performed well in the acadenic lab to
The current dietary recommendation is to consume less than 0.1 mol of sodium per day. This is about one teaspoon of table salt. It includes all salt and sodium consumed, including sodium used in cooking and at the table. The sodium content of a po..
What is the differences and similarities between Oldowan, Acheulean, and Mousterian?
what is molarity of the diluted bleach and of the original bleach solution? b. what is the mass of sodium hypochlorite per 100 mL of the stock bleach solution. c. If the density of the bleach solution is 1.05 g/mL, what is the percent of bleach by..
The density of osmium is 22.57g/cm^3 what volume will be occupied by 4.06 kg of osmium
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol.
A balloon is filled to a diameter of 30.5 cm with air in Los Angeles when the temperature is 25 degrees C. It is brought to Flagstaff where the temperature is 5 degrees C
Carbon dioxide dissolves in water and water evaporates into the atmosphere during the experiment. How do these two factors affect the results of your analysis in this experiment? Where an experiment of an Alka Seltzer tablet is put in a mixture of..
Explain what is the pH at the point during a titration when 31mL of 0.200 M HCL has been added to 27mL of 0.0500 MNH3 solutions. HCL is strong acid, Kb = 1.8×10-5 for NH3.
the density of the compound as a gas was found to be 4.02g/L at 127 degrees C and 256 torr. What are the empirical and molecular formulas of the compound
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