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A) Heat capacity of the calorimeter which is 10.17kJ/Degree Celsius and the temperature rose 105 Degrees Celsius.
How many FOOD CALORIES does this cookie contain?
B) At body temperature 2,404 joules of energy are required to evaporate 1.00 grams of water. A typical person prespires 25 mL(density = 1.00 g/mL) of water after 20 minutes of exercise.
How much body heat in FOOD CALORIES is the person using to evaporate this water? Did they burn off what they ate in part A?
Write the net ionic equations for the reactions.
An ideal gas is in a cylinder with a volume of 250.0 mL at a temperature of 25 ºC and a pressure of 700 torr. The gas is expanded to a volume of 1.0 L and the temperature increased to 500 ºC.
Explain why cis dichloroethene has a boiling point of 60 degrees C while trans - dichloroethen has a boiling point of 48 degrees C.
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
The enthalpy of combustion of acetylene C2H2 is C2H2(g) + 5/2O2(g) ->2CO2(g) + H2O(l) H°rxn= -1299 kJ Calculate the enthalpy of formation of acetylene, given the following enthalpies of formation H°f[CO2(g)] = -393.5 kJ/mol ,H°f[H2O(l)] = -285.8 k..
When sodium is heated, a yellow spectral line whose energy is 3.37x10^19 J/photon is produced. What is the frequency and wavelength of this light?
what is the density of a block of marble that occupies 306 cm3 and has a mass of 804 g? answer in units of g/cm3.
Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 200.0 mL of 0.12 M NH3. The Kb for NH3 is 1.8 x 10-5.
if a plant produces 5.06 mol of C6H12O6, how many moles of CO2 are needed?
Determine the average atomic mass of boron is the natural abundance of 10B weighing exactly 10.0129 amu is 80.1% and the natural abundance of 11B weighing exactly 11.0093 amu is 19.9%.
calculating theoretical yield for this experiment. It is a dehydration synthesis where one mol of hydrated salt yields 3 mol hydrates and 1 mol of anhydrous salt.
Compute the number of mL of 2.00M H2SO4 required neutralizing 125.5mL of 1.2M KOH
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