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A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m above the ground. The ball travels straight upward. In the absence of air resistance, to what maximum height above the ground does the ball rise?
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent
Draw a circuit diagram that has two resistors in series with a DC voltage source. If resistor one (R1) is 758 kohms and resistor two (R2) is 712 kohms, then what is the current flowing through the circuit if the voltage is 8.49 V?
In the first 12.0 of the reaction, 1.8×10-2 of is produced in a reaction vessel with a volume of 0.260 . What is the average rate of the reaction over this time interval.
Ethanol (molar mass = 46 g/mol) can be dehydrated to yield ethene (molar mass = 28 g/mol) by heating it with an excess of concentrated sulfuric acid (acting as a catalyst).
Calculate the pH after adding 0, 10.0, 25.0 and 30.0 mL of titrant in the titration of 50.0 mL of 0.100M NaOH with HCl 0.200 M.
A saturated solution of silver benzoate C6H5COOOAg has a pH of 8.5. The Ka for benzoic acid C6H5OOH, is 6.5x10-5 estimate the value of the Ksp for silver benzoate
If 0.0598 moles of potassium hydroxide are added to 250 ml of this buffer, what is the pH of the resulting solution? (Assume that the volume change does not change upon adding potassium hydroxide)
A student takes 148. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
The analysis of a coal from Pennsylvania is reported as follows (wt. %)
what is the molar mass of the unknown liquid in g/mole?
The operations manager of a large production plant would like to estimate the mean amount of time a worker takes to assemble a new electronic component. Assume that the standard deviation of this assembly time is 3.6 minutes.
Alkenes, choose which statement best dis cribe alkenes from the followings. (a) are relatively polar cpmpound (b) have lower boiling points than alcohols of similar molecular weight. (c) are reasonably soluble in water. (d) both A and B (e) none of..
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