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1. Solid Calcium is burned in Oxygen to produce Calcium Oxide Is it 2Ca (s) + O2 (g) -> CaO (aq) ?
2. Aqueous solutions of barium hydroxide and potassium sulfate are mixed to produce barium sulfate and potassium hydroxide
3. Iron + Oxygen -> Iron (III) Oxide (note: not aqueous!)
4. Sulfuric acid is mixed with aqueous sodium hydroxide to produce water and sodium sulfate.
5. Liquid C6H12 is burned in air.
A sample of gas occupies 2.78 x 103 mL at 25oC and 760 mm Hg. What volume will the gas sample occupy at the same temperature and 475 mm Hg?
solution of a weak monoprotic acid, pKa 2.346, is mixed with 37.3 ml of 0.0832M sodium hydroxide. What is the pH of the resulting not a simple buffer solution?
Determine what %by weight of sodium carbonate does it contain if the specific gravity of the silver nitrate solution = 1.25?
When 5.00 × 1022 molecules of ammonia react with 4.00 × 1022 molecules of oxygen, how many grams of nitrogen gas are produced? 4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g)
here A solution of a primary standard KHC8H4O4 was prepared by dissolving 0.4877g potassium hydrogen pthalate in 50 ml H2O. Titration with KOH required 23.84 ml to reach a phenopthalein end point . What is the molarity of KOH
In the winter time, it is common to sprinkle NaCl on icy roads and driveways. Why is this done? Would calcium chloride be more or less effective
Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, N or S, is a chiral compound, contains ONLY one functional group, and is a sulfide.
Where does the extra electron come from when determining the formal charge of NH2? N has 5 valence electrons and H each have one which lead to two bonds and one lone pair and one lone electron which equals a formal charge
strontium metal crystalizes in a cubic unit cell which has a edge length of 612 pm. If the mass of an atom of Sr is 87.62 amu, and the density of Sr is 2.54 g/cm3.
2C8H18(g) + 25O2(g) --> 16CO2(g) + 18H2O(g) 0.400 mol of octane is allowed to react with 0.600 mol of oxygen. Which is the limiting reactant?
what is the density of sample of ammonia gas if the pressure is 705mmHg and the temperature is 63.0 degrees C?
Glass will dissolve in concentrated solutions of either NaOH or KOH. At 25C the two reactions below tae place at the same rate. 4NaOH + SiOH2 -->Na4SiO4 + 2H2O is reaction 1. reaction 2 is 4KOH + SiO2 ---> K4SiO4 + 2H2O
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