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Zinc metal reacts with excess hydrochloric acid to produce hydrogen gas according to the following equation: Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g) The product gas, H2, is collected over water at a temperature of 25 C and a pressure of 755 mm Hg. If the wet H2 gas formed occupies a volume of 9.94 L, what is the number of mols of Zn reacted? The vapor pressure of water is 23.8 mm Hg at 25 oC.
If 25.0 grams of potassium chlorate decomposes, how many grams of gas are released as a product?
esters are normally unreactive toward sodium borohydride but they react readily with lithium aluminum hydride to
The mass of an average blueberry is 0.72 g and the mass of an automobile is 1900 kg. Find the number of automobiles whose total mass is the same as 1.0 {rm mol} blueberries.
calculate the equilibrium constant (Keq) at 298 K for the reaction below. Use F = 96,500 C/mol for Faraday's constant and R = 8.314 J/(mol K) for the gas constant. 1 Mn2+(aq) + 2 Na(s) 1 Mn(s) + 2 Na+(aq)
a solution of ammonia and water contains 2.00times1025 water molecules and 5.30times1024 ammonia molecules. how many
A 50.00-mL sample of .1000 M KOH is titrated with .287 M HNO3. Calculate the pH of the solution after 52.00 mL of HNO3 is added.
what is the percent yield of a reaction in which 228. g phosphorus trichloride reacts with excess water to form 118 g
calculate the concentration of the hydronium ion in a solution prepared by mixing equal volumes of .050 molar HOCL and .020 molar NaOCl
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones? i) What is the three dimensional structure of methane? Why?
Take element Z = 57 from the periodic table. Ionize it 56 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
A solution of a specific vitamin has ?max = 251nm and a concentration of 4.79x10^-7M. The absorbance of the solution at 251 nm is A = 0.175. What is the molar absorptivity of the vitamin at 251nm
consider the following reactioncacl2 s rarr ca2 aq 2 cl- aq deltaho -81.5 kja 38.3 g sample of cacl2 mw 110.98 gmol
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