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In a coffee-cup calorimeter, 1.60 g of NH4NO3 is mixed with 78.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.35°C. Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
Suppose a mercury thermometer contains 3.450 of mercury and has a capillary that is 0.180 in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0C to 25.0 C? The density of mercury at these temperatures is..
A sample of sodium reacts completely with 0.142 kg of chlorine, forming 234 g of sodium chloride. What mass of sodium reacted?
Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.33 mol H2S is placed in a 4.7 L container
If a 50.0 g object needs 1,145 Joules to increase its temperature by 10.0 oC, what is its specific heat capacity?
What is the density of hydrogen gas at 23.0^C and a pressure of 1640 psi?
Choose two functional groups and for each group find a household product that contains the group. Then explain the action of the product in terms of the intermolecular forces that these groups impart to the molecule.
Suppose you add 4.25 g of naphthalene, C10H8, to 67.9 g of benzene, C6H6, and they form an ideal solution. The vapor pressure of pure benzene is 0.1252 atm at the temperature of the experiment.
What is the theoretical yield(in grams) of aspirin ,C9H8O4, when 2.00g of salicylic acid,C7H6O3, is reacted with4.00g of acetic anhydride
A 0.1752g sample of silver nitrate was dissolved in 502.3g of distilled water. Calculate the weight molarity of silver in this solution.
What is the theoretical yield of SO 3 produced by the quantities described in Part A and How many Oxygen molecules are required to react with 7.82g of S?
A solution is prepared by dissolving 2.33g of C60 in 100.0g of toluene. Given that the vapor pressure of pure toluene is 5.00kPa at 30C what is the vapor pressure of toluene in the solution.
How many molecules of water are produced when 143 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water.
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