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Determine the radius of an Al atom (in pm) if the density of aluminum is 2.71 g/cm3. Aluminum crystallizes in a face centered cubic structure with an edge length of 2sqrt2 r.
How many molecules of carbon dioxide are produced when 129 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water?
A 43-N child is in a swing that is attached to ropes 1.6 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
Write full electronic configuration of Period 3 element with following successive Ionization energies (ie1 = 738 KJ/mol, IE2=1450KJ/Mol, IE3 = 7732 KJ/Mol, IE4 = 10539 KJ/mol and IE5 = 13628 KJ/Mol
In an experiment, you use 8.600 g of solvent (FP = 79.3°C; Kf = 5.0°C/m) and 0.780 g of solute (molecular mass = 210.71 g/mol).
The potential energy of the system is zero at the equilibrium position and has a maximum value of 50 J. When the displacement of the block is half the minimum value its instantaneous kinetic energy
A substance has a molar extinction coefficient of 2.4x104cm-1M-1 and an absorbance of 0.10 What is the concentration of this substance in a cuvette with a 1.0 cm path length?
The cart is released from rest, allowing it to roll, pulled by the falling hanger. What is the formula for the acceleration a of the cart in terms of the cart's mass M, the hanger's mass m, and the
A 650.0g sample of zinc ( specific heat= 0.0922 cal/g X degrees Celsius) was cooled from 100.0 degrees Celsius to 29.4 degrees Celsius in a calorimeter cup containing water initially at 21.5 degrees
A dentist uses a small mirror of radius 42 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 15 mm from the tooth, what is the magnification of the image?
Solution containing a small concentration of HA is green. What color change do you expect when you dilute this solution with an equal volume of distilled water?
(a) Calculate the heat per second per square meter that is conducted through the ice-aluminum combination. (b) Calculate the heat per second per square meter that would be conducted through the alum
A car traveling at 30.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 when the brakes are applied. How many revolutions does each tire make before the car comes to a stop, as
A river flows due east at 1.00 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.0 m/s due north relative to the water. If the river is 3
What is the maximum weight that a "massless" balloon filled with 1.00 meters cubed of helium can lift into the air? Assuming that the density of air is 1.20 kg/m cubed and that of helium is o.177 k
e. How many grams of the K2C2O4 X H2O in the salt mixture remain unreacted (in excess)? f. what is the percent by mass of each salt in the mixture?
A 200 {rm kg} weather rocket is loaded with 100 {rm kg} of fuel and fired straight up. It accelerates upward at 34 {rm m/s^2} for 32 s, then runs out of fuel. Ignore any air resistance effects. Wha
What mass of acrylonitrile can be produced from a mixture of 2.85 kg of propylene, C3H6 (42.09 g/mol), 1.65 kg ammonia, NH3 (17.04 g/mol).
Carbonic acid, H2CO3, and the bicarbonate ion, HCO3-, are important components of the buffering system in blood plasma. The concentrations are [H2CO3] = 0.0012 M and [HCO3-] = 0.024 M. pKa for carbo
A handball of mass 0.10 kg, traveling horizontally at 30. m/s, strikes a wall and rebounds at 24 m/s. What is the change in the momentum of the ball?
What is the net ionic equation for this acid-base neutralization reaction? After you have written the net ionic equation, describe in 1 or 2 sentences the changes undergone by the KHP molecule.
Space invaders land on earth. On the invaders' temperature scale, the ice point is at 25 °I (I = invader), and the steam point is at 156 °I. The invaders' thermometer shows the temperature o
A 1.00 x 10^3 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the average power output of the automobile engine?
The surface area of 100 g of glucose is much larger than that of 1 g. Explain why the solubility does not increase with the amount of solid deposited at the bottom of the flask.
What is the safe's coefficient of kinetic friction on the bank floor?