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Problem- Describe how you would prepare 250.0 mL of 0.150 M ammonium ion solution beginning with solid ammonium phosphate, (NH4)3PO4.Rework your solution from the beginning and check each step carefully.
a chemist measures the vloumes of 1.00 mole n2 and 1.00 mol so2 and finds they differ by 0.30 l. which gas produced the
calculate the solubility of caoh2 in a 0.469m cacl2 solution at 31degc given that the ksp of caoh2 is 4.96 x 10-6 at
what kind of subshell is being being filled in groups ia and iia? in groups iiia to viiia? in the transition elements?
The nuclear mass of 141Ba is 140.883 amu. Calculate the binding energy per nucleon for 141Ba.
Water is added to 25.0 ml of .716 MKNO3 solution until the volume of the solution is exactly 500 ml. What is the concentration of the final solution?
what is an example of a hypothesis testing for the percentage of ethanoic acid in vinegar? Give me examples of hypotheses and how to test them. thanks :)
The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.5 x 15.5 x 8 ft
Calculate the distance (in Angstroms) and energy (KJ/mol) where the molecules are most attractive.
when hydrogen sulfide gas is bubbled into a solution of sodium hydroxide the reaction forms sodium sulfide and water.
This increases to 0.010 Msec^-1 at 90 degrees C. Calculate the activation energy for this reaction.
Predict whether the reaction below is product-favored or reactant-favored by calculating delta Gdegree from the entropy and enthalpy changes for the reaction at 25 degrees C, H2(g) + CO2(g) yeilds H2O(g) + CO(g), delta H rxn = 41.17kJ S = 42.08J/K
sketch the curves for the distribution of energy states and their electron popultaions for a metallic conductor, an insulator
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