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The molar heat of fusion of tungsten is 33.7kJ/mol. What mass of tungsten can be melted by the addition of exactly 150cal at its melting point
a) H2 (g) + Br2 (g) â?" 2 HBr (g) + heat [0.513] [0.62] [0.346] b) N2O4 (g) + heat â?" 2 NO2 (g) [0.0325] [0.022] c) NH4SH (g) â?" NH3 (g) + H2S (g) + heat [0.027] [0.0234] [0.209] Calculate Ke for the following (equilibrium concentrations give..
Where on the modern periodic table would you probably find an element that is a dense gas at room temperature? EXPLAIN 3) What should be the most metallic element?
If all the energy obtained from burning 1.29 pounds of propane (fuel value is 11.09 kcal/g) is used to heat 124.5 kg of water at an initial temperature of 21.5 °C, what is the final temperature
When 350.0 mL of 0.45 M benzoic acid is titrated with 0.15 M NaOH, what is the pH of the solution after 200.0 mL of base has been added? The pKa for benzoic acid is 4.19
Calculate the equilibrium concentrations of PCl5, PCl3, and Cl2 if only PCl5 is present initially, at a concentration of 0.160M .
What is the maximum number of liters of Fe2O3(s) that can be made from 11.53 L of O2(g) and 16.07 L of FeS(s) at STP?
Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite: MgCO3(s) => MgO(s) + CO2(g) ?Hrxn = 117.3 kJ What is ?H in kJ when 28.87 g of CO2 reacts with excess MgO?
Find the normal boiling point of a saturated solution of LiF at 100C, assuming it undergoes complete dissociation. The solubility of LiF is 230 mg/100 g of water at 100C
Why was potassium carbonate used in the distillation of 2-methyl-e-hexanol? Use the curved arrow notation to deaw a mechanism to show
What mass of water can be heated from 22?C to 100 ? C by burning this piece of coal? Answer in units of g
.1500g of an unknown sample was passed through a column of Amberlite-IR-200(+) resin and titrated with .2050M NaOH. If 9.75mL of titrant was required to reach phenolphthlein endpoint,
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions.
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