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Potassium metal reacts with water to give potassium hydrozide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted? 2 K9s) + 2H2O(1) -2KOH(aq) + H2(g)
Barium chromate dissolved upon treatment with nitric acid forming an orange solution. Write a net ionic equation to represent the overall reaction that occurs.
A sample of mercury(II) oxide is placed in a 5.00 L evacuated container and heated until it decomposes entirely to mercury metal and oxygen gas
A sample of dry air contains 210 mL of oxygen, 780 mL. of nitrogen, and 10 mL of all other gases. What is the pressure in mm of Hg due to the nitrogen if the total pressure was 1000 mm
how many grams of NO are required to produce 145 g of N2 in the following reaction? 4NH3+6NO-- 5N2+6H2O
The mole fraction of potassium nitrate in an aqueous solution is .0194. The density of the the solution is 1.0627 g/mL. Calculate the molarity of the solution.
The empty bulb is filled with water and weighed. The water-filled bulb has a mass of 268.63 g at a temperature of 25.0 0C. The density of water at 25.0 0C is 0.9970 g/mL. Use the mass of the empty bulb and this data to show that the volume of the ..
3I2(s) + 2P(s) → 2PI3(s) What is the percent yield of the reaction if 28.3 g of phosphorus triiodide PI3 is obtained when 68.0 g of I2 and 68.0 g of P are mixed and allowed to react.
Explain, why you used sulfuric acid in the experiment, not HCl. (3) Give the structures and names (including description of stereochemistry) of three alkenes produced in dehydration of 3-methyl-3-pentanol.
a solution of 116 ml of 0.170 m koh is mixed with a solution of 230 ml of 0.240 m niso4. what precipitate
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC.
The molar heat cacpacity of silver is 25.35 J/ mol C. How much energy would it take to raise the temperature of 11.1g of silver by 14.2 C? B) Find the specific heat of silver?
The following compounds, listed with their boiling points, are liquid at -10 degrees celsius: butane, -0.5 degrees celsius: ethanol, 78.3 degrees celsius: toluene, 110.6 degrees celsius.
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