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If 19.50g of CaCl2 are dissolved in enough water to give 250ml of solution, what will be the molar concentration if the Cl- ion in this solution?
When 0.228 g of the hydrate ZnSO4•xH2O is heated, 0.128 grams of anhydrous ZnSO4 remains. What is the value of x in the formula for the hydrate?
The two objects have the same mass. If they are to have the same total kinetic energy, what should the ratio of the cylinder's angular speed to the spherical shell's angular speed be?
write the structural formula and the name of the organic product that would result from the hydrogenation addition of
what is the molar mas of gas if 1.20g of the gas has a volume of 235 mL at STP? A 1.26 sample of He gas has a pressure of .123 atm and volume of 32.6 L. what is the temperature in degrees C?
Assume that an incorrectly adjusted lawn mower is operated in a garage such that the combustion reaction in the engine is:
State the meaning of alpha and beta with regard to steroid structure, and indicate whether the hydroxyl group on ring A and the alkyl group on ring D are alpha or beta
A volume of 25.0 mL of 0.100 M C6H5CO2H(aq) is titrated with 0.100 M NaOH(aq). What is the pH after the addition of 12.5 mL of NaOH. (Ka of benzoic acid = 6.3 ´ 10-5)
I have a stock solution of Fe at 50.24ppm. I transfer 1mL to a volumetric flask and dilute with DI water to 100mL. How many ppm is the new solution
How many kJ of heat are needed to completely melt 1.30 moles of , given that the water is at its melting point? The heat of fusion for water is 6.02 kJ/mole.
a large weather balloon filled with helium as a volume of 7.00 x 102 l at stp. which expression should be used to find
What is the concentration of OH (in M) initially present in a 12 M NH solution? Hint: The K of NH is 1.8x10. Express your answer to two significant figures.
For a mass of 0.010 g Mg and 5.0 mL of 1.00 M HCl, calculate the partial pressure of the resulting H2(g) in a flask with V = 145 mL at 25?C.
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