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In a house the temperature at the surface of a window is 22.3 °C. The temperature outside at the window surface is 2.74 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the conditions inside the house remain the same. As a result, the heat lost per second increases. What is the temperature in degrees Celsius at the outside window surface when the heat lost per second doubles?
Given the heat of combustion for the following reactions, determine the enthalpy of formation for pentane, C5H12.
You are titrating a 50.0mL solution of calcium hydroxide with phosphoric acid. if it takes 15.00mL of 0.0360 M phosphoric acid to reach the equivalence point what is the concentration (in M) of the calcium hydroxide solution
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 204.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid. Calculate the normal boiling point of this liquid.
Describe the reaction and mechanism of solvolysis reaction of tert-butyl bromide in ethanol.
Compare the primary, secondary, and tertiary structures of a protein with the structure of a telephone
in one city a balloon with a volume of 6.0 l is filled with air at 101 kpa pressure. the balloon in then taken to a
according to a study of us cigarette sales between 1955 and 1985 when the price of cigarettes was 1 higher consumption
A 70kg skier is going down a hill that is inclined at a 12 degree angle to the horizontal. the coefficient of kinetic friction between waxed skies and snow is .05. The force of the air resistance on the skier is 15.6N. find the skiers acceleration..
Aspirin (acetylsalicylic acid) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the ph . What was the ka value calculated by the student if the ph of the..
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.2..
Can someone please help me I need to A. Write the complete equation for each reaction that produced a precipitate
Write a balanced half-reaction for the oxidation of chromium ion (Cr^3+) to dichromate ion (Cr2O7^2) in acidic aqueous solution. Be sure to add physical state symbols where appropriate
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