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For the following reaction, 5.02 grams of nitrogen gas are mixed with excess hydrogen gas. The reaction yields 4.74 grams of ammonia. nitrogen (g) + hydrogen (g) --> ammonia (g)
A string that is fixed at both ends has a length of 2.49 m. When the string vibrates at a frequency of 80.8 Hz, What is the fundamental frequency of the string
Using the data below. Assume the cells are roughly spherical. What is the average cell surface area
A solution is made by mixing 46.0 mL of ethanol, C2H6O, and 54.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C
A 50g ball of clay is thrown horizontally at 40m/s toward a 1.5kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What impulse does the clay exert on the bloc
Estimate the average area of a cell in square micrometers, and the diameter of a single cell in micrometers, using the data below. Assume the cells are roughly spherical. What is the average cell su
A gun shoots small plastic balls. The ball falls 1.2 m while traveling horizontally 5.1 m. Calculate the speed the ball leaves the gun
A 23.45g piece of iron and a 29.95g piece of gold at 100.00C were dropped into 530ml of water at 16.05C. The molar heat capacities of iron and gold are 25.19 (j/mol x C) and 25.41 j/(mol x C). respe
A uniformly charged sphere has a potential on its surface of 450 V. What is the radius of the sphere
A spring (k=100N/m) is squished x=.40 m with a mass m=1 kg held against it. With what speed v does the mass exit the rough region
Calculate E for each chemical reaction that produces 943 kJ of heat but does no work on its surroundings.
Consider a Boeing 777-200 airplane of wing span 60.93 m cruising horizontally at Mach 0.785 (about 828 km/h) due north in a region where the earth's magnetic field is .98*10<-5 T, Which end of th
The reusable booster rocket of the U.S. space shuttle employs a mixture of aluminum and ammonium perchlorate for feul. the chemical reaction that occurs is
Calculate E for a system that absorbs 814.0 kJ of heat from its surroundings and does 676.0 KJ of wor on its surroundings.
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.13 m2, what is the percentage lost by the window
you are a fighter pilot in your jet. you are moving at 1000 km/h when you go into a climb in order to avoid a HUGE UFO. What is the radius of the circular arc
An expanding gas does 175.0 J of work on its surroundings at a constant pressure of 1.0 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas
One method for measuring the speed of sound uses standing waves. A cylindrical tube is open at both ends, find the speed of sound in the gas in the tube
Describe how a distillation works: how can you separate out things with it? which of the functional groups could you easily react via organic reactions to create different compounds
An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. What is the tire pressure in pascals
What is the system that is buffered, what is the pH of the system and what compounds are responsible for the buffered system?
A sample of 35 millimole of Krypton gas expands reversibly and isothermally at 373K from 5.25 cubic centimeters to 6.29 cubic centimeters. The internal energy, U, increases by 41.75 J.
A 1 pF capacitor is connected in parallel with a 2 pF capacitor, the parallel combination then being connected in series with a 3 pF capacitor. Which capacitor has the greatest charge
Explain how molecular spectroscopy can be used for either the measurement or identification of a molecule.
Water is being sprayed from a nozzle at the end of a garden hose of diameter 2.0 cm. what is the speed of the water inside the hose