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A certain quantity of helium gas is at a temperature of 27degrees C and a pressure of 1.00 atm. What will the new temperature be if its volume is doubled at the same time that its pressure is decreased to one half of its original value?
A 70 piece of ice at 0 is added to a sample of water at 6. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?
Small helium-neon lasers emit 1.51 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
degree C is mixed with 35.2 g/mL of water (density = 1.0 g/mL) initially at 24.4 degree C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
Calculate the [CH3CO2H] ionized in solution for 0.1M acetic acid knowing that ph= 2.9 [H+]= 1.26 x 10^-3 M , [OH-]= 7.94 x 10^-12 M
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
Consider a situation in which 211g of P4 are exposed to 240g of O2. What is the maximum amount of P2O5 that can theoretically be made from 211g of P4 and excess oxygen?
What exactly is the reduction of alkynes? I just understand that it is a method for synthesizing alkenes. Why are the leaving groups for E2 reactions not as good as E1 reactions?
how many moles of nitrogen are in 5.3 L container at 1.25 atm and a temp of 85 degrees C.
After heating, 37.19 grams of the anhydrous compound remained. What is the formula of the hydrate?
If 0.80g of gas occupies 295 mL at 25 degrees celsius and 680 mm Hg of pressure, what is the molar mass of the gas?
A 45.5g sample of copper at 99.8 Celsius is dropped into a beaker containing 151 g of water at 18.5 Celsius.
The volume of a gas sample is 200L at 740 torr. what is its volume at 760 torr? Assume that the Temperature remains constant
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