a sample of 20.0ml of .10M CH3NH2 is titrated with .15M HCl. the Kb for CH3NH2 = 4.2 X 10^4
A 32.0-g sample of water at 290. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
At 55.0C, what is the vapor pressure of a solution prepared by dissolving 75.8 g of LiF in 265 g of water?
Two 2.0-cm-diameter insulating spheres have a 5.20 cm space between them. One sphere is charged to + 81.0 nC, the other to – 18.0 nC
A system of inertia 0.57 kg consists of a spring gun attached to a cart. The system is at rest on a horizontal low-friction track. A 0.050-kgprojectile is loaded into the gun, then launched at an angle of 40∘with respect to the horizontal plane. With what speed does the cart recoil if the projectile rises […]
an ordinary car would not be able to go around an unbanked curve of a perfectly smooth road, no matter how the driver turned the wheelsTrue or False
A 65.0 kg base runner begins his slide into second base when he is moving at a speed of 4.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to […]
what is the header measurements for an APA format for the title page? Our dependance upon the earth
Solutions Closed book (yes/no) (Formula weights: HCl =36.5; MgSO4.H2O= 169, sucrose =342.3, mannitol =182.17, CaCl2.2H2O = 147, KCl =74.5, NaOH= 40.0; Na2HPO4= 414.96; MgCl2 .6H2O = 203.31; conc HCl = 11.6 M; conc. Describe how you would make up 75 mls of 5% sucrose. Starting with concentrated HCl, describe how you would make up 50 […]
using slater’s rules, calculate the Zeff of a Cl- and a K+ ion
