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when 67.7g of calcium and 30.5g of nitrogen undergo a reaction that has a 93.0% yield, what mass of calcium nitride forms?
A student is given an antacid tablet that weighed 5.6832g. The tablet was crushed and 4.3628 g of the antacid was added to 200mL of simulated "stomach acid". This was allowed to react and then filtered.
A reaction 3A2+ + 2B --> 3A + 2B3+ is used to make a battery. The standard Gibbs free energy change for the given reaction is -690 kJ. What is the standard potential (E ) for the battery.
Methane gas is completely combusted the products are carbon dioxide gas and water gas. What statement can be correctly made regarding the entropy change of this reaction
Calculate the pH of a solution made by mixing 50.0 mL of 0.100 M NaCN with 11.82 mL of 0.438 M HClO4 . pKa for HCN = 9.21
If a molecule will form a secondary carbocation after withdrawal of the leaving group, does that favor Sn1 (formation of the carbocation intermediate) or Sn2 (straight to the products)
Write the balanced formula unit equation for the reaction of tetraphosphorus decoxide, P4O10, with water to form an acid
Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium?
A solution was prepared by dissolving 10.12g of KCl.MgCl2 (277.85g/mol) in a sufficient water to give 2L. Calculate a.) the molar analytical concentration KCl. MgCl2 in this solution
pcl5g reverse reaction arrow pcl3g cl2gsuppose that 3.314 g of pcl5 is placed in an evacuated 460. ml bulb which is
Elements cannot be decomposed by chemical means, but can be decomposed by physical means.
a sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 k. what is the new volume of the gas if pressure is
a gaseous mixture of and contains 32.8 nitrogen by mass. what is the partial pressure of oxygen in the mixture if the
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