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When hydrogen gas and nitrogen gas react to form ammonia, the enthalpy change is recorded as 45.92 kJ per mole of ammonia formed. How many moles of hydrogen gas and nitrogen gas are needed in order to produce 15.31kJ of energy?
The heat of fusion is 4.6 kJ/mol and the heat of vaporization is 46.0 kJ/mol. Finally, the specific heats of the solid, liquid and gas are, respectively 2.1, 3.2 and 1.8 J/g oC.
Oxyhemoglobin is bright red, while deoxyhemoglobin is purple. Elucidate the difference in color in terms of the electron configurations of iron in these 2 complexes.
Formic acid, HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas
A solution is composed of 1.30 mol cyclohexane (Pcy=97.6 torr) and 2.50 mol acetone (Pac=229.5 torr). what is the total vapor pressure Ptotal above this solution
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
A 25.00 mL sample of this solution was withdrawn and treated with 50.00 ml of 0.1186 M Ce^+4 in acid solution, and after a few minuted the excess Ce^+4 was black-titrated, requiring 31.13 mL of 0.04289 M Fe^+2 solution. Calculate the weight percen..
A 0.9550g sample of a creation metal reacts with acid to liberate 380mL of hydrogen gas when collected over water at 20 degrees C and 720torr total pressure. Explain what is the equivalent mass of the metal. Explain what metal could it be
Explain how this system appears static but in fact is a dynamic equlibrium, Na+(aq) + Cl-(aq) --> NaCl(s), that is in constant motion though the mass of solid is constant.
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
A student mixes four reagents together, thinking that the solution will neutralize each other. The solutions mixed together are 53.6 mL of 0.129 M hydrochloric acid, 104.1 mL of 0.215 M of nitric acid, 501.5 mL of 0.0126 M calcium hydroxide
How many grams of ammonium nitrite must be decomposed if 98.5 liters of nitrogen are to be produced?
The new electronic configuration of neon -the atomic number of the element with a completed shell -the number of unpaired electrons in fluorine
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