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The value of delta H for the decomposition of gaseous sulfur trioxide to its component elements, 2SO3 (g) ---> 2S (s, rhombic) + 3O2 (g) is _____ kj/mol.
A ball is thrown in the air at an initial angle 35 degrees above the horizontal. It takes 4 seconds for the ball to hit the ground
Suppose that a radiologist who is 4.0 m from a small, unshielded source of radiation receives 3.4 units of radiation. To reduce the exposure to 0.34 units of radiation, to what distance from the sou
Calculate delta Hvap of pure alcohol using clausius-clapeyron equation. At 19 C vapor pressure for pure alcohol is 40 torr. At 35 C vapor pressure for pure alcohol is 100 torr
What mass of cesium bromide must be added to .500 L of water (d=1.00g/mL) to produce a 0.144 m solution? What are the mole fraction and the mass percent of CsBr
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
What is the molality of a solution consisting of 3.43 mL of carbon tetrachloride (CCl4; d=1.59 g/mL) in 78.4 mL of methylene chloride (CH2Cl2; d=1.33 g/mL)
an RLC series circuit consists of a 24 V (rms) 0.50 Hz AC power supply, a 25 ohm resister, a 10 H inductor, and a 0.050 F capacitor, what is the rms current through the inductor
Complete the following reaction: Pb-210 decays by ? (beta) emission to form what new necleus? Write the complete nuclear equation.
An argon-ion laser produces a cylindrical beam of light whose average power is 0.662 W. How much energy is contained in a 1.88-m length of the beam
Suppose that you have two identical capacitors and a single resistor. If you make an RC circuit with one capacitor, What is the time constant for this circuit
the vapor pressure of water is 25 mmHg: a) What is the pressure of the dry O2 gas? b) How many moles of O2 were produced? c) How many grams of KClO3 were produced
A gas mixture contains helium and oxygen at partial pressures of 255 torr and 0.450 atm. what is the total pressure, in mmHg, of the mixture after it is placed in a container on-half the volume of t
A double slit with d= 0.02 mm is illuminated by a blue laser at 450 nm and a red laser at 650 nm, what is the distance separating the blue and red fringe
A screen with a double-slit with a slit separation of 0.03 mm is illuminated by light of a wavelength 600nm. What is the distance from the slit to the screen in meters
Explain what happens to the atomic number of a nucleus when positron emission occurs
What is the total pressure, in mmHg, of a gas mixture containing argon gas at 0.25 atm, helium gas at 350 mmHg, and nitrogen gas at 360 torr
Hydrogen gas can be produced in the laboratory through the reaction of magnesium metal with hydrochloric acid
A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire. When the wind blows hard, What is the mass of the sculpture
In the information of smog, nitrogen and oxygen gas react to form nitrogen dioxide. How many grams of NO2 will be produced when 2.0 L of nitrogen at 840 mmHg and 24 degrees C are completely reacted
A block weighing 15.0 N rests on the floor. What force does the floor exert on the block
A kind of glass has an index of refraction of 1.640 for blue light of wavelength 430 nm, what is the angle between the two beams inside the glass
1-Complete the following reaction: Pb-210 decays by emission to form what new necleus? Write the complete nuclear equation.