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calculate the ph of a solution made up from 22 g of potassium hydroxide dissolved in 146 ml of 016 m perchloric acid
a buffer is made by dissolving 112 g of sodium dihydrogen phosphate nah2po4 and 177 g of disodium hydrogen phosphate
a 43-m long plank with a weight of 164 n is place on a dock with 14 m of its length extended over the water the plank
john and david are carrying bob on a uniform horizontal board 89 m long which weighs 211 n bob weighs 542 n and is
a buffer solution is prepared by mixing together equal quantities of formic acid hcho2 and sodium formate nacho2 write
1 the 1s--gt 2p transition in a hydrogen-like atom occurs at 100x106 cm-1a what is the ionization energy of this atom
a roller in a sheet-metal processing plant has a diameter of 177 m and a mass of 5871 kg assume the roller is a solid
a 49n brick is placed in 1m3 of oil the volume of the oil raises to 1025m3 the weight of the brick in oil at the bottom
1 lead is below tin but above copper suppose that you wanted to remove lead ions from a solutiion to make it less
if 38 kcal is released by combustion of each gram of glucose how many kcal are released by the combustion of 15 mol of
a 7500 resistor a 9500 mh inductor and a 5500 f capacitor are connected in series with an ac source with amplitude of
calculate the volume of 600 m naoh that can be added to a buffer composed of 0160 mol ch3chohco2h and 0179 mol
a man tries to determine the distance to an island offshore by using his knowledge of physics and wave motion he
a cannon ball is fired at an angle of 22 above horizontal with an initial speed v0 300 ms reaching a maximum height h
a group of students perform the same conservation of mechanical energy experiment that you performed in lab by allowing
a batter hits a baseball straight upward at home plate and the ball is caught by the catcher 50 s after it is struck
what is the major organic product formed when methylmagnesium bromide a strong nucleophile is treated with benzaldehyde
sodium borohydride to 9-fluorenone that you used in the experiment we used 100 mg of 9-fluorenone and 10 mg sodium
a 60 skydiver can be modeled as a rectangular box with dimensions 21 41 18 part a what is his terminal speed if he
draw the mechanism including formal charges on the ns of the first step of the synthesis where anthranilic acid is
expand 1046 mole of an ideal monatomic gas initially at 526 kpa and 605 k from initial volume vi 100 m3 to final
what is the ph to nearest 001 ph unit of a solution prepared by mixing 670 ml of 0558 m hcl and 580 ml of 0767 m
a coil of wire is in the plane of the paper the north pole of a magnet is facing the coil what is the direction of the
a student placed 160 g of glucose c2h12o6 in a volumetric flask added enough water to dissolve the glucose by swirling
write detailed mechanism for the formation of ethyl acetate from ethanol and acetic acid with h2so4 as a