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Waves on a Stick a flexible stick 2.0 m long is not fixed in any way and is free to vibrate. Make clear drawings of this stick vibrating in its first three harmonics, and then use your drawings to f
Two insulating spheres have radii r1 and r2, masses m1 and m2, and uniformly distributed charges -q1 and q2. They are released from rest when their centers are separated by a distance d.
What is the percent ionization of a solution prepared by dissolving 0.0223 mol of chloroacetic acid, HC2H2O2Cl) in 1.80 L of water? For chloroacetic acid, Ka = 1.4 ? 10-3.
Suppose part of this solution is then diluted to prepare 500.0ml of .200M. What volume of water was added to the original solution to prepare the diluted solution.
0.11 g of a monocarboxylic acid is neutralized by 12.5 mL of a 0.1 N sodium hydroxide solution. What is the molecular weight of the acid?
Calculate the molar heat of vaporization of a substance given that 0.383 mol of the substance absorbs 24.1 kJ of energy when it is vaporized.
Calculate the volume of hydrogen that should form from the mass of aluminum used in this experiement? The mass of aluminum is 2.004 grams.
The complete combustion of 1.076g of C9H8O in a bomb calorimeter ( Cccalorimeter=3.895 kJ/ degree C) produced an increase in temperature of 11.21C. Calculate the molar enthalpy of combustion in kJ/
A supermarket sells 2 cans of ground coffee for $18.50. the cost of coffee varies directly with the number of cans. how much do 5 cans of coffee cost?
If the total pressure in the flasks is 306 torr after the stopcock is opened, determine the intial pressure of N2 in the 1.00 L flask?
What must be added to 5/14 of 7/35 to make the sum equal to 7/3 of 1/21 ? Please solve it without using "x factor ".
What are the molecular (formula) masses of the following substances? Express your answer using one decimal place.
The activation energy for the reaction O + O3 ? 2O2 is 25 kJ/mol, and the enthalpy change is ?H = -388 kJ/mol. What is the activation energy for the decomposition of O2 by the reverse reaction
An experiment shows that a 249 -mL gas sample has a mass of 0.433 g at a pressure of 750 mm Hg and a temperature of 29?. What is the molar mass of the gas?
If all the energy obtained from burning 1.28 pounds of butane(fuel value is 10.85Kcal/g) is used to heat 123.0kg of water at an initial temperature of 18.7 C, what is the final temperature?
Calculate the concentration (M) of sodium ions in a solution made by diluting 70.0 mL of a 0.274 M solution of sodium sulfide to a total volume of 400 mL.
What is the molar concentration of a solution of sulfuric acid, H2SO4, if 9.11 mL react completely with 0.254 g of NaOH which was dissolved in 200 mL of water?
Exactly 18.9 mL of water at 26.0 C are added to a hot iron skillet. All of the water is converted into steam at 100C. The mass of the iron skillet is 1.35kg and the molar heat capacity of iron is 2
A few minuteslater, after traveling 100 feet east, the angle of depression tothe same landmark is determined to be 61°. Use this information to determine the height of the balloon.
A gas mixture contains 1.29 g N2 and 0.93 g O2 in a 1.49- L container at 23?. Calculate the mole fraction of N2.
Question: "Sam" and "Martha" are local names for two lighthouses. Sam blinks every 12 seconds, Martha every 8 seconds. They blink together at midnight. How many seconds will pass before they blink t
Calculate the deBroglie wavelength of a 1000 kg automobile traveling at 100 km per hour. Calculate the deBroglie wavelength of an electron traveling at 1% of the speed of light.
What is the partial pressure of argon, P_Ar, in the flask? What is the partial pressure of ethane, P_ethane, in the flask?
The temperature of a 22.0 g sample of material increases from 190.0 degree C to 42.0 degree C when it absorbs 5.00 kJ of energy as heat. What is the specific heat of this material?
A recipe that makes 6 servings calls for 1/3 cup of orange juice and 1/2 cup of lemonade. Arlene modifies the recipe so that it can serve 9. How many cups of orange juice does Arlene need?