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Problem- The root-mean-square speed of a gas is found to be 391.2 m/s at 270 K. Which of the following is the gas?
I have read my textbook moreover I still don't understand so please provide me a very condensed, simple to know answer?
Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-).
when 7.50 g of magnesium reacts with 9.50 g hydrochloric acid, hydrogen gas is formed. what is the limiting reagent?
a sample of an unknown gas effuses in 10.5 min. an equal volume of h2 in the same apparatus under the same conditions
The Ksp of calcium carbonate, CaCO3, is 3.36 × 10-9. Calculate the solubility of this compound in g/L.
Which of salts hydrolyze in aqueous solution- CH3COONa, NiCl2, Ca3(PO4)2. State ionic equations for the hydrolysis reactions. predict the pH of the solution equal 7,greater than 7,less than7
The figure shows (R,R)-1-ethyl-2-methylcyclohexane in one of its chair conformations. Draw the same compound in its other chair conformation. Follow this procedure.
A sample of gas is collected over water at c and mm Hg. The collected gas occupies 130 mL. The vapor pressure of water at 23.5 c is 21.7 mm Hg. The approximate molecular weight of this gas
What mass of solid potassium nitrite would need to be dissolved in 500. mL of 0.40 M HNO2 to make 500. mL of a NO2?/HNO2 buffer solution that has a pH = 3.25? Ka of HNO2 = 7.1 x 10?4
If someone using one of those masks exhales 0.716 g of CO2/min, how many grams of potassium superoxide would be consumed in 12.00 minutes?
Where we isolated caffeine from tea bags using extraction, drying, evaporation, and sublimation. Wanted to know what would happen to the caffeine if the sublimation step were performed at atmospheric level.
A certain reaction has an enthalpy of delta H= -24KJ as well as an activation energy of Ea =73kj. Explain what is the activation energy of the reverse reaction
How many Valence electrons, bonding electrons, and lone pair electrons are present
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