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a 2.00 kg sample of pure water at 20.0 degree celsius absorbs 3.53 kJ of heat. What is the final temperature of the water?
A 24 L sample of a gas at fixed mass and constant temperature exerts a pressure of 3.0 atm. What pressure will the gas exert if the volume is changed to 16 L?
How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mass solution.
an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
Suppose .30 mol of Ammonia and .40 mol of oxygen are added to a 5L container. If Y mol of water is present at equilibrium, calculate the equilibrium concentration of oxygen?
For the gas-phase reaction 2 NO2 + F2 → 2NO2F, the rate constant k is 38 M-1s-1 at 27° C. The reaction is first order in NO2 and first order in F2.
If 85 J of heat are added to a pure gold coin with a mass of 15g , What is its temperature change? Specific heat capacity of gold is 0.128.
Calcium reacts with iodine z=53. If a sample of the compound formed contains 7.4x10^21 calcium ions, how many iodine ions does it contain.
If 1.50g (NH4)2SO4 is dissolved in enough water to form 250 ml of solution, what is the molarity of the solution.
A student studied the clock reaction described in this experiment. She set up a reaction mixture by mixing 10mL of 0.010 M KI, 10mL of 0.0010 M Na2S2O3, 20mL of 0.040 M KBrO3 and 10 mL of 0.10 M HCL.
What is the osmotic pressure of human blood at 37°C if human blood is isotonic to 0.16 M NaCl solution? Remember that NaCl almost completely ionizes in water.
Determine the mass of carbon dioxide (in g) produced from the complete combustion of 1.40×10-2 g of C6H10 with excess oxygen.
Write down the balanced chemical equation when Fe 3 O 4 reacted with carbon monoxide and calculate mass of carbon dioxide that will be produced in this reaction if 234 g carbon monoxide is reacted with excess Fe 3 O 4 ?
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