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A mass of 0.5kg is whirled at 120 rpm in a horizontal circle at the end of a string 2 meters long. Neglecting the force due gravity, find: a) the angular velocity b) the centripetal motion
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 29.7 mL of di
At 1500 degrees C the equilibrium constant for the reaction CO(g)+2H2(g) --><--CH3OH(g) has the value Kp=1.4x10^-7. Calculate delta G for this reaction at 1500 degrees C.
A sample of an unknown gas effuses in 12.4 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.59 min. What is the molar mass of the unknown gas?
(a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
Calculate the quantity of water each student was required to use and the maximum recovery of benzoic acid possible in each case.
How many grams if lead (II) iodide are formed? ( molar mass: pb(no3)2= 331 g;KI 166g; pbI2 =467 g; kno = 101 g.
Aspirin has a pH of 3. Some pepole who take large amounts of aspirin (for example, for arthritis) take a pill that combines with Maalox. What's the purpose of the combination?
A car traveling 45 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling .80 m. What was the average acceleration of the driver during the collision?
An aqueous solution has a vapor pressure of 83.7 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
A baseball leaves the bat with a speed of 33.5 m/s at an angle of 37° above the horizontal. A very high fence is located at a horizontal distance of 88.4 m from the point where the ball is struc
If the solubility of a particular solute is 10g/100g H20 at 20 degrees C, which of the following solution concentrations would represent a supersaturated aquenous solution of that solute?
What is the chemical formula for Calcium Bromate
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane
Explain how DNA tweezers can function as a simple DNA nanomachine?
A saturated solution of lead iodate in pure water has a lead ion concentration of 4.0 x 10¯5 mole per liter at 25 °C. Calculate the value for the solubility-product constant of Pb(IO3)2 at 25
You wish to make a 0.294 M perchloric acid solution from a stock solution of 6.00 M perchloric acid. How much concentrated acid must you add to obtain a total volume of 150 mL of the dilute solution
Write the correct chemical Formula for Radium Sulfite
Calculate the number of H3O+(aq) ions in a typical cell with an intracellular pH of 6.4. A typical cell has a volume of 1.6 x 10-12 cm3 and contains about 80% water by volume.
How many atoms of carbon are there in 0.39 mol of procaine, C13H20N2O2, a "pain killer" used by dentists?
10.7 mL of a 0.049 mol/L EDTA solution is required to titrate a sample to the equivalence point. How many moles of divalent metal cations were in your sample?
The gravimetric analysis of this experiment is meant to be quantitative; therefore, all precautions should be made to minimize errors in the analysis. The crucible and lid are handled exclusively wi
A mixture of NO(g) at a partial pressure of 1.50 atm and NO2(g) at a partial pressure of 0.50 atm is allowed to come to equilibrium in a sealed container maintained at 20 C. What is the total pressu
What is the complete and balanced equation of C4H10S + O2?
The fizz of Alka seltzer dissolving in water is due to the following reactions. 3NaHCO3((aq) + H3C6H5O7(aq) --> 3CO2 (g) + 3H2O(l) + Na3C6H5O7(aq). If you begin with 2 grams of each reactant whic