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Which of the following correctly describes the point at which boiling occurs? A. A liquid always starts to boil at the normal boiling point temperature. B. A liquid boils when its vapor pressure is the same as the pressure of its surroundings. C. A liquid boils when its heat of vaporization is the same as its temperature. D. A liquid boils when its evaporation rate becomes constant.
When a container is filled with 3.00 mol of H2 , 2.00 mol of O2 , and 1.00 mol of N2 , the pressure in the container is 465 kPa. determine the partial pressure of O2?
How many atomsof carbon are present in 34.5 grams of caffeine?
Calculate the concentration of (C6H6O6)2- in an aqueous solution of .0619 M ascorbic acid, H2C6H6O6 (aq).
which produce no significant response to interfering ions. It is then used to measure the pH of 0.0100 M NaOH in 0.50 M NaCl at 25 degrees C. What is the observed pH under these conditions if the true pH is 1.13?
A buffer was formed by mixing 50.0 mL of 0.206M NH4Cl(aq) with 45.0 mL of 0.222M NH3(aq) {Kb (NH3) = 1.8 x10-5 } . What is the pH of this buffer solution?
For the following reaction, if 11.2 L of Nitrogen are reacted to form NH3 at STP, How many liters of Hydrogen will be required to completely consume all of the nitrogen.
How many moles of water will be formed from 0.2 mole of CH4 reacting with enough O2. In this reaction CH4+2O2--->CO2+2H2O
according to the following pKa values listed for a set of acids, which would lead to the strongest conjugate base?
How many milliliters of 6 M HNO3 would you add to 300 mL of the buffers solution to change the pH from 5.09 to 5.03?
A camera falls from a blimp that is 485 m above the ground and rising at a speed of 16.8 m/s. Find the maximum height reached by the camera with respect to the ground. The acceleration of gravity is 9.8 m/s2
A compound is 40.0 , 6.70 , and 53.3 by mass. Assume that we have a 100.- sample of this compound.The molecular formula mass of this compound is 180 . What are the subscripts in the actual molecular formula?
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas (n1), and its volume is 50.0 L (v1). If 0.500 mole of gas leak out, and the pressure and temperature remain the same, what is the final volume of ..
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