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What are some examples of 7a elements? How many valence electrons do these elements have? Are these elements considered reactive? What are some practical uses of some group 7a elements?
What volume to the nearest 0.1 mL of 4.50-M NaOH must be added to 0.400 L of 0.150-M HNO2 to prepare a pH = 3.20 buffer
Question- Part 1) For the following unbalanced chemical equation, show the two half - cell reactions, and balance the equation
The piece of iron with a mass 102.9g was submerged in a graduated cylinder filled with water. The initial level of water was 20.0 ml. The density of iron is 7.86 g/ml.
A compound with empirical formula C 2 H 2 N dissolved its 0.0800 gram in 10.00 g of C 6 H 6 , freezing point of resulting solution= 4.99 degree celsius
a mixture of n2 o2 and co2 has a total pressure of 791. torr. in this mixture the partial pressure of n2 is 115. torr
what spontaneous reaction will occur in aqueous solution among the ions Sn4+, Sn2+, Co3+, and Co2+ ? What will be the E°cell for this reaction?
The standard width between rails on North American and most European railroads is 4 ft 8 in. Calculate this distance in meters and centimeters.
Silver chloride usually does not ppt in solution of 1.0M NH3. However AgBr has a smaller Ksp. Will AgBr ppt form a solution containing 0.01M AgNO3, 0.01M NaBr and 1.0 M NH3? Ksp = 5 x 10^-13
Draw an oxygen saturation curve for a cooperative protein that shows a p50 of 45 torr. On the same graph draw a c curve that shows a protein that is non-cooperative with p50 of 15 torr
Having an initial concentration of an acid of 2.69*10^-4 and having volumes at the equivalence point of 22.38mL and 21.27mL, Calculate the concentration of the base of 0.10 M NaOH
Write balanced molecular, total ionic and net ionic equations for the reaction of aqueous copper (II) sulfate and aqueous sodium sulfide. Be sure to include proper phase labels.
A syringe containing 1.65 of oxygen gas is cooled from 94.6 to 5.0. What is the final volume of oxygen gas
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