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A steel cylinder of oxygen has a volume of 20.0 L at 22degrees C at 35 atm. What is the volume at STP?How many mol of oxygen are in the container?
Which of the following would be expected to have the lowest freezing temperature?
The natural abundance of c-14 in all living things is 1ppt. The half life of c-14 is 5,730 year (+/- 40 years). How old is something (+/-) that is found to have
The densities of ice and water at 0 C are 0.9168 and 0.9998 respectively. if delta h for the fusion process at atmospheric pressure is 0.625 what is delta u.
How many grams of dry NH_4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}.
a gas company in massachusetts charges $2.80 for 15ft^3 of natural gas at 20 degrees C and 1 atm. Calculate the cost of heating 200mL of water from 20 degrees C to 100 degrees C.
Why is the same volume of thiosulfate used in each reaction? What is the purpose of the thiosulfate? [You must explain the technical reasons for including the thiosulfate
Write the ionic equation for the reactions. Write the net ionic equations for the reactions, A.) LA2(CO3)3 (s)+HCL (aq)= LaCl3 (aq) + CO2 (g) + H20
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves
How can you distinguish chemically between starch and three other carbohydrates (sucrose, glucose, & lactose)? What would you expect to observe when adding one drop of iodine-potassium iodine reagent to each of the four carbohydrates?
A bottle of nail polish remover contains 182 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788mL.
In the titration, 34.67 mL of the sodium hydroxide solution was required to react with 0.1082 g KHP. Calculate the molarity of the sodium hydroxide.
Water is added to 25.0 mL of a 0.776 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution.
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