Calculate the atomic weightof the element
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 2.82A(A with a circle on top), and the density of the crystal is 7.92g/cm^3. Calculate the atomic weightof the element.
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If 2.00 moles of a substance is dissolved in 1.00 kg of water the freezing point of the solution decreases by 7.44 celsius. does this substance dissociate to form ions in solution? why?
A ball of mass m = 0.20 kg strikes a wall with an initial speed of 5.0 m/s and rebounds in the opposite direction with a speed of 2.0 m/s. If the ball is in contact with the wall for 1.5 ms what is the magnitude of the forced exerted by the ball o
Acid chlorides are reactive with water. we are able to prepare the polymer of nylon 6,6 in the presence of water (5% aqueous 1,6 hexanediamine contains water) Why is this was possible?
An inductor ( L = 42.9 mH), a capacitor ( C = 86.8 micro farad ), and a frequency of 60.0 HZ, determine the power supplied to these elements.
How many grams of ethylene glycol are needed per kg. of water to protect radiator fluid against freezing down to -10 degress celcius?
Drug medications are often prescribed on the basis of body weight. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 150-lb person.
A 2.0 kg object has a velocity v = 4.0i m/s at t = 0. A constant resultant force F = (2.0i + 4.0j) N then acts on the object for 3.0 s. What is the magnitude of the object's velocity at the end of the 3.0 s interval?
Separation of gold from other materials involve the use of potassium cyanide in the following equation:What is the minimum amount of KCN in grams needed to extract 69.3 g of gold?
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