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A sample of zinc nitride, Zn3N2, contains 39.0 g of zinc. How many nitride ions are present
What is the pH of the solution during the titration when the following volumes of the NaOH have been added to 34.5-mL of the acid.
A solution of .312 M KOH is used to neutralize 15.0 mL of a .186 M H3PO4 solution. what volume, in milliliters, of the KOH is required to reach the endpoint. H3PO4(aq)+3KOH(aq)>K3PO4(aq)+3H2O(l)
In the Virtual ChemLab experiment "Electronic State Energy Levels," what gaseous element is used in fluorescent light tubes?
The mass spectrum of an organic compound shows the relative abundances of M to be 38.82% and M 1 to be 7.977%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundances: 12C is ..
The reactant concentration in a zero-order reaction was 8.00×10-2 after 100 and 4.00×10-2 after 370 .
calculate the energy levels of the pi-network in octatetaene c8h10 using the particle in the box model. to calculate
Lactic acid (C3H6O3) which occurs in sour milk and foods such as sauerkraut, is a weak monoprotic acid.? The pH = 0.10 M solution of lactic acid is 2.43 What are the values of Ka and pKa for lactic acid
Hydrogen gas was collected over water in a eudiometer at 26 oC when the atmospheric pressure was 756 mm Hg. What was the pressure of the hydrogen gas?
Show why this chemical is dangerous, by showing chemical reactions for its formation in the environment and its reactions in the atmosphere.
determine the empirical formula for each substance.1. a dead alkaline battery is found to contain a compund of mn and
A sample contained a mixture of CdS and ZnS. The amount of CdS was determined by reacting 5.903 g of the sample with an excess of HCl to release H2S from each compound
A certain reaction releases 10.1 kJ at constant volume and at constant pressure releases 8.4 kJ. What is the (delta)U for the reaction?
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