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You leave 255 grams of water outside at 21.0 C in the sun. After 30.0 minutes the temperature is 35.0 C.
A) how many calories of energy was used by the sun to heat the water up?
B) how many joules of energy is this?
C) How many Joules / second of power did the sun provide? (Hint: how many seconds are in 30.0 minutes?)
what is the final volume of a 400.0 ml gas sample that is subjected to a temperature change from 22.0 degrees C to 30.0 degrees C and a pressure change from 760 mm Hg to 360 mm Hg
If a 180 mg piece of gold (density =19.32 ) is hammered into a sheet measuring 2.41.0 , what is the average thickness of the sheet in meters.
when selecting the appropriate wavelength and bandwidth for a spectrophotometric analysis the bandwidth should be as
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 82% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9*10-12.]
name the four general types of carbonyl reactions. give an example of each including a detailed mechaism. use a propyl group next to a carbonyl in each example.
On a trip of 287 miles, a driver maintains an average speed of 85.0 km/hr. How many minutes does the trip take
The reaction CH3CH2NO2 + OH- → H2O + CH3CHNO2- obeys the rate law d[A]/dt = -k[A][OH-], where A denotes CH3CH2NO2. It takes 0.5 min for one percent of the A to react at 25°C.
If antique brass is 30.0% zinc and 70.0% copper, how many grams of antique brass can be made from 18.0 grams of zinc and 35.1 grams of copper
It is used to control the ph and provide nutrients in the biological (microbial) treatment of municipal wastewater streams. Calculate the ratio of solubility of Mg(OH)2 dissolved in pure H20 to Mg(OH)2 dissolved in a 0.200 M NaOH solution?
Some AgCl(s) has been placed in a beaker of water. After some time, the solubility of Ag+ and Cl- was measured to be 2.5 x 10-5 M. Determine whether the system has reached equilibrium.
The equilibrium constant K(p) for the reaction: H2(g)+I2(g)-> 2HI(g) at this temperature is 54.3. Determine the equilibrium partial pressures of H2, I2, and HI
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?
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