Chemistry, 26.10.2019 03:43 Kangarue27
The so-called hydrogen economy is based on hydrogen produced from water using solar energy. the gas is then burned as a fuel: 2h2(g) + o2(g) → 2h2o(l) a primary advantage of hydrogen as a fuel is that it is nonpolluting. a major disadvantage is that it is a gas and therefore is harder to store than liquids or solids. calculate the volume of hydrogen gas at 28°c and 1.00 atm required to produce an amount of energy equivalent to that produced by the combustion of a gallon of octane (c8h18). the density of octane is 2.66 kg/gal, and its standard enthalpy of formation is −249.9 kj/mol. assume that the products of the combustion of octane are co2(g) and h2o(l).
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Chemistry, 22.06.2019 10:10
Stage in which a typical star has completely stopped fusion
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Chemistry, 22.06.2019 14:00
The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.
Answers: 3
Chemistry, 22.06.2019 14:00
8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.
Answers: 3
The so-called hydrogen economy is based on hydrogen produced from water using solar energy. the gas...
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