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A 0.536 g sample of a metal nitrate salt, M(NO3)2, contains 0.0171 mol of oxygen atoms. Determine the atomic weight of M.
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 395 g of pure Cu?
One cart of mass 15kg is moving 5 m/s to the right on a frictionless track and collides with a cart of mass 3kg. The final velocity of the carts that become stuck together after the collision is 1.5
Find the mass of a projectile when fired at 275 m/s if it is to have the same momentum as a 145 g projectile that is fired at 325 m/s
A certain solid metallic element has a density 7.87 g/cm3 and a molar mass of 55.85 g/mol. It crystallizes with a cubic unit cell, with an edge length of 286.7 pm. calculate the number of atoms per
A driver in a car traveling at a speed of 78 km/h sees a cat 101m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 99m?
A 1.502 gram sample of a compound of aluminum and sulfur is known to contain exactly 0.540 grams of aluminum. Determine the empirical formula for the substance.
diamond crystals have a=0.3560nm and z=8. Using 3.51 g/cm3 as the density of diamond, calculate the value of avogadro's number.
Your goal is to determine whether the rocket hits the other building. If it falls short or goes over, determine where it lands. If it hits the building, determine the height of the impact.
Cadmium(II) forms a soluble 1:4 complex with bromide ions with Kf = 5.0·10^3. Calculate the emf generated by the cell.
The rate of decomposition of C3H6 in the following reaction is 0.45 M/s. Calculate the rate of production of H2O.
How manny kilograms of chalcopyrite (cufes2). how manny kilograms of chalcopyrite must be mined to obtain 420. g of pure Cu?
Draw a picture of the following cell and write reduction half-reactions for each electrode. Pt(s)|Fe3+ (aq),Fe2+(aq)||CrO72-(aq)|Cr3+ (aq),HA(aq)|Pt(s).
Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane (M = 86.18 g/mol) at 49.6 degrees C. P hexane = 400.0 torr at 49.6 degrees C.
If 1.3618 mol of AsF3 are allowed to react with 1.000 mol of C2Cl6, what would be the theoretical yield of AsCl3, in moles?
What is the correct form of the conversion factor needed to convert the number of moles of H2O to the number of moles of NH3 produced.
Calculate the rate constant for the decomposition of acetaldehyde from the above data. Based on the data given, what is the half-life of acetaldehyde?
In the first test tube, you added 1.0 mL of 0.1 M Fe(NO3)3. How do you explain the shift in equilibrium in terms of LeChatelier's Principle?
The energy of activation of an uncatalyzed reaction is 60 kJ/mol. The energy of activation is reduced to 25 kJ/mol for the enzyme catalyzed reaction. Please calculate the rate constant of the cataly
A total of 2.00mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 188g of solution. The reaction caused the temperature of the solution to rise from 21.0
The resulting calibration equation is: Intensity = 84,250 M-1 * [Li+] + 1.75 If the intensity of your unknown sample is 90, what is the concentration of Li+ in the analyzed sample?
Write a balanced chemical equation for the reaction.
Imagine that you have a 6.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the large
Estimate the experimental yield of mononitration in the reaction. What errors are there in using this method to calculate the extent of mononitration?
If 72.4 kJ of heat is supplied to a 852 g block of metal, the temperature of the metal increases by 9.6°C. Calculate the specific heat capacity of the metal in J/g·°C.