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A sample of oxygen gas collected at a pressure of 0.623 atm and a temperature of 280 K is found to occupy a volume of 634 milliliters. How many moles of O2 gas are in the sample? answer in mol please
Determine the concentration of the sodium hydroxide solution? Considering this balanced equation given as :
In a beaker, I mix 50 ml of 3 M HCl with 100 ml distilled water. Both fluids are at 25 C initially. (Cp mix =. 0.985 cal/g-C) a. what is the final T.
A student substitutes his unknown for the NaBrO3. The dichloroethene layer turns dark orange. Which ions could be ruled out and what test should be performed next?
Draw all the resonance structures for the N2O4 molecule. The skeletal structure of the molecule is
How would the ground-state energy levels of X and H compare (where X is an atom with one electron like Hbut different energy levels)? For X: E = - (RH / n3) and RH is the same as H (2.179 ×10?18J).
Nitrogen dioxide decomposes at 6.50 x 10-3 M s-1 during the reaction: 2NO2(g) --> 2NO(g) + O2(g) Answer the following questions:
What mass of Na2S2O3 is required to prepare 1.00 L of a solution that will dissolve 1.00 g of AgBr by the formation of Ag(S2O3)2^3-? Show work.
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
8 ml of the HCl was used to titrate the pK_a 3.8 group; so 2 ml was enough to titrate the rest of the high pK_a group. The upper pK_a group must have begun the experiment as 80% acid form, 20% base form.
Substances A, B, C can all ac as oxidizing agents. In solution, A is green, B is red, and C is yellow. In the reactions in which they participate, they are reduced to A-, B-, and C- ions,
Arrange equimolar solutions of the following compounds in the increasing pH (lowest to highest). Explain your answer.
A solution contains 1 x 10-3 M Fe2+ and 2 x 10-10 M Fe3+. As the pH of the solution is raised, which iron hydroxide will precipitate first (i.e., ferrous hydroxide, Fe(OH)2(s) or ferric hydroxide, Fe(OH)3(s)). At what pH will this occur?
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