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How much heat energy is required to raise the temperature of 0.362kg of copper from 23.0 °C to 60.0 °C? The specific heat of copper is 0.0920 cal/(g·°C) .
Determine the shortest frequency of light required to remove an electron from a sample of Ti metal, if the binding energy of titanium is 3.14 x 103 kJ/mol.
The vapor pressure of a liquid chloroform, CHCl3, is 400.0 torr at 24.1 c and 100.0 torr at -6.3C , what is Hvap of chloroform
2Fe(s) + O2(g) => 2FeO(s) ?H = -544.0 kJ 4Fe(s) + 3O2(g) => 2Fe2O3(s) ?H = -1648.4 kJ Fe3O4(s) => 3Fe(s) + 2O2(g) ?H = +1118.4 kJ Given the data above, determine the heat of reaction, ?H, for the reaction below: Reaction: Fe2O3(s) + FeO(s) => Fe3O..
The percentage of an additive of gasoline was measured six times with the following results: 0.13, 0.12, 0.16, 0.17, 0.20, 0.11%. Find the 90% confidence level interval
two full bottles contain respectively 1.0 kg of potassium nitrate kno3 and 1.0 kg of strontium chloride srcl2. which
Calculate the ratio of rates of effusion of O2 versus Cl2. Record your answers to three significant figures. The concentration of CO2 in the atmosphere is 375ppm (by volume). What is the mole fraction of CO2 in the atmosphere?
A solution is prepared by dissolving 0.11 mol of acetic acid and 0.11 mol of ammonium chloride in enough water to make 1.0 L of solution. Find the concentration of ammonia in the solution.
What mass of potassium sulfate is produced when 45.6 g of KMnO4 reacts with 56.4 g of H2SO4? 4KMnO4 + 6H2SO4 --> 2K2SO4 + 4MnSO4 + 6H2O + 5O2
A block of metal has a width of 3.2 , a length of 17.1 , and height of 4.2 . Its mass is 1.5 . Calculate the density of the metal.
How much heat is required to raise the temperature of 5.5 x 10^2 g of aluminum by 10°C?
Even if a cospotted TLC analysis of an unknown with an authentic standard is performed, one still does not know with complete certainty that the unknown and the standard are identical.
Which metal hydroxide will precipate first? Why? Ksp Ni(OH)2 = 6.0x10-16 Ksp Ce(OH)3 = 6.0x10-22 Ksp Cu(OH)2 = 4.8x10-20
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