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The standard molar heat of formation of water is -285.8 kJ/mol. Calculate the change in energy required in making 70.0 mL of water from its elements under standard conditions. _______kj
What mass (in grams) of CH4 is contained in a 555 mL volume at a pressure of 760.0 torr, and at a temperature of 400.0 K?
A galvanic cell is constructed that has a zinc anode immersed in a Zn(NO3)2 solution and a platinum cathode immersed in an NaCl solution equilibrated with Cl2 gas at 1 atm and 25 degrees centigrade.
A soft drink contains an unknown amount of citric acid, C3H5O(COOH)3. 10.0ml of the soft drink requires 6.42 ml of 9.580 x 10^-2 M NaOH to reach the equivalance point in the following reaction.
What mass of sodium nitrite must be added to 350 mL of water to give a solution with a pH
Which of the following are more soluble in acidic solution than in pure water. Ca(OH)2 Mg3(PO4)2 PbBr2
During the laboratory exercise you will need 100.00mL of a 0.20M Ni^+2 solution and 25.00ml of a 0.10M Co^+2 solution. You will prepare the Ni^+2 solution from solid NiSO4 (X) 6H20 and the Co^+2 solution from solid Co(NO3)2 (X) 6H20
Identify the molecullar forces present in H2S nd SeO3?
Imagine a small electron-sensitive probe of volume 1.00pm^3 insterted into an H2+ molecule ion in its ground state. Calculate the probability that it will register the presence of an electron at the following positions
The lamps worked by dripping water onto calcium carbide that generated acetylene gas (H2C2) that was burned. If the reaction is CaC2 + 2H2O H2C2 + Ca(OH)2, how many liters of acetylene gas at 1.00 atm pressure and 0.00 °C are produced from 75.0 gr..
How many mL of 0.25 m NaOH solution are required and What is a standard soluyion in an acid-base titration
Sodium carbonate was used to precipitate silver from a solution. 6.00 grams of silver carbonate were recovered from 1.500L of solution.
Calculate the number of grams of glucose must be dissolved in water in order to produce 100.0 ml of a 3.700 M glucose solution (C6H12O6). Density = 2.601
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