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How much heat does your body lose when 1.5 g of sweat evaporates from your skin at 25 C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 C is 44.0 kJ/mole.
A technician would like to find the concentration of a NaOH solution using KHP as the primary standard. The reaction of NaOH and KHP is as followed:
Identify the limiting reagent for the given combination of reactants. Calculate how many grams of whatever substance will be in excess and how many grams of HF will be made.
Write the reaction between ferric chloride and lime slurry that results in precipitation of Fe(OH)3. For a dosage of 40 mg/l FeCl3: What is the required stoichiometric addition of lime expressed as CaO?
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2? Molar Mass SO2 64.1 gmol
Consider a rigid, adiabatic, impermeable cylinder (i.e., a closed isolated system) that consists of two chambers (i.e., simple systems) that are separated by a wall that is permeable
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water,
Three gases (8.00 rm g of methane, CH_4, 18.0 g of ethane, C_2H_6, and an unknown amount of propane, C_3H_8) were added to the same 10.0 L container.
A solution containing 100g of unknown liquid and 900g water has a freezing point of -3.33C. Given Kf=1.86C/m for water, determine the molecular weight of the unknown liquid and express your answer in g/mol.
What is the pH of a solution in which 258 mL of HCl(g), measured at 27.5^circ C and 1.02 atm, is dissolved in 1.5 L of aqueous solution?
A 120-pound person uses 3 Calories per minute walking at a 20 min/mile pace. Approximately, how many miles would a person have to walk to burn off a scoop of ice cream (175 Calories)?
How many grams of H2O can be cooled from 45 degrees C to 15 degrees C by the evaporation of 63 grams of water.
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