AP Chemistry
iron has a density of 7.86 g/cm3 and crystallizes a body centered cubic lattice. Show that only 68% of a body centered lattice is actually occupied by atoms, and determine the atomic radius of iron
Chemistry
What is the molarity of potassium nitrate?
Calculus
Water is leaking out of an inverted conical tank at a rate of cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height centimeters and the diameter at the top is centimeters. If the water level is rising at a r...
physics
A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?
Physics
A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?
Science
1. A 25.00 sample of 0.723M HClO4 is titrated with a 0.273M KOH solution. The H3O+ concentration after the addition of 10.0mL is___M. 2. Determine the pH of a 0.188M NH3 solution of at 25 degrees C. The Kb of NH3 is 1.76x10-5.
Statistics
New data is added to change the mean time to 6 mninutes and 10 seconds with standared deviation 2 minutes and 5 seconds. The mean depth is now 115.5 feet with standard deviation 31.6 feet. If the association is still negative and r^2=.68, find the slope of the regression line ...
elapsed time
10:30am to 1:20 what is the answer
math
rewrite equation in standard form: 1+1/5y = 1/3x
geometry
suppose j is between h and k.use the segment addition postulate to solve for x.then find the length of each segment hj=5x jk=7x kh=96
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