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Upon decomposition one sample of magnesium fluoride produced 1.66 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine did the second sample produce?
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 6.26
A 10.0-mL solution of .510 M NH3 is titrated with a .170 M HCl solution. Calculate the pH after the following additions of the HCl solution.
Calculate the collision frequencies z12 and z21, where hydrogen is component 1 and chlorine is component 2. Given: d1=0.272nm and d2=0.544nm.
A sample of mercury (II) oxide is placed in a 10.00 L evacuated container and heated until it decomposes entirely to mercury metal and oxygen gas. The container is then cooled to 22.5 degress celcius.
What is the pH of a solution containing 4.555 g of potassium sorbate, KC6H7O2 , KSORB, MM = 150.21 g/mol, in 0.750L of solution?
suppose you want to move a rock. it has a volume of 1.2m^3 aout waist high and 4 feet long. and a density of 2.5g/cm^3. how many pounds doesx it weight?
Which of the following combiantions of terms best describe the polymerization of a diisocyanate (OCN-R-NCO) and a diol to form a polyurethane
A student carefully diluted 25.0mL of 6 M NaOH solution in 475 mL if distilled water. Calculate the molarity of the diluted solution of base.
Calculate the apparent degree of dissociation of the NH4Cl if the freezing point of this solution is -15.3OC?(Molal freezing point constant =1.86 0C)
Determine how many grams of oxygen gas would be needed to combine exactly with 13.2 kg of propane (C3H8) gas (the 3 and the 8 are subscripts).
How many moles of nitrogen, N, are in 65.0 g of nitrous oxide,N2O ? Express your answer with the appropriate units.
Technetium-99 is a long-live radioactive isotope of technetium. Each nucleus decays by emitting one beta particle. What is the product nucleus?
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