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A gas at 439 K occupies 5.98 L at a pressure of 1.38 atm. What will its pressure (in atm) be at 228 K if its volume is reduced to 4.40 L
In the circuit shown, R1= 800 ohms, R2= 500 ohms, R3= 200 ohms, and V=9V. Find the equivalent resistance of the whole circuit
A sustained force of 52N moves a model airplane 22m along its runway to provide the required speed for takeoff
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12
Suppose in the double-slit arrangement, d = 0.150mm, L =120cm, %u03BB =833nm, What is the path difference %u03B4 for the rays from the two slits arriving at point P
Calculate the molarity (M) of a solution prepared by dissolving 13.1 g of HI in enough water to make 2.35 L of solution.
8 equal drops of water are falling through air with a steady velocity of 10 cm/s. then the terminal velocity of the big drop is
What is the molar mass if a 0.550-g sample occupies 258mL at a pressure of 744 torr and a temperature of 22 degrees C
The two isotopes of uranium, U-235 and U-238 can be separated by effusion of the corresponding UF6 gasses. What is the ratio of the root mean square speed 238-UF6 to that of 235-UF6
A sample of gas weighs 4.542 grams and has a volume of 870.0 mL at 945.0 torr and 39.0 degrees Celsius. What is its molar mass
Calculate the pH of the solution formed by the addition of 55.5 mL of 0.100 M NaOH to 49.2 mL of 0.100 M H3PO4.
A force of 15 N acting at an angle of 25 degrees to the horizontal is used to pull a box a distance of 5 m across a floor. How much work is done
A boy pulls with a force of 20 N on the 300 N wagon. What acceleration does the wagon have
A 3.00L container is rated to hold gas at a pressure no greater than 100atm. Assuming the gas law behaves ideally, what is the maximum number of moles a gas that this vessel can hold at 27 degrees C
A golfer hits a ball from the origin with an initial speed of 30.0m/s at an angle of 50 degrees above the horizontal. what is the speed and direction of motion of the ball just before it lands
A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370
the flow rate of blood through a 2.10x10^-6 m radius capillary is 4.07x10^-9 cm^3/s. what is the speed of the blood flow
As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). what is the total cross-sectional area of the capillaries feeding these venules
A 1.3-kg block of ice is initially at a temperature of -6.0%u2218C. If 3.0*10^5 J of heat are added, what is the final temperature
if your body has a density of 967 kg/m^3, What fration of you will be submerged when in salt water? the density of salt water is 1025 kg/m^3
A certain hydrolic system is designed to exert a force 108 times as large as the one put onto it. What must be the ratio of their diamerters
How many kilojoules of heat are absorbed when 40.6 of mgo is decomposed into mg and O2 at constant pressure
An airplane is cruising at an altitude of 10 km. Model the air as an ideal fluid to find the speed of the stream of air flowing through the leak
Chlorine gas is to be heated from 100oC and 1 atm to 200oC a. Calculate the heat input (kW) required to heat a stream of the gas flowing at 5 kmol/s at constant pressure
Water is forced out of a fire extinguisher by air pressure, as shown in Figure P9.64 where h = 0.495 m. How much gauge air pressure in the tank