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vitamin c contains 4092 c 458 h and 545 o by mass what is the empirical formula of vitamin
suppose an astronaut has landed on mars fully equipped the astronaut has a mass of 128 kg and when the astronaut gets
describe how to make a sodium formate hcoona formic acid hcooh buffer that has a ph of
a 100 ml sample of rainwater is neutralized by 224 ml of 0122 m naoh assuming that the acid present in sulfurous acid
a projectile projectile is fired at an upward angle of 45o from the top of a 265-m cliff with a speed of 185 ms what
a uniform electric field of magnitude 405 nc pointing in the positive x-direction acts on an electron which is
a certain reaction is spontaneous at 134c if the enthalpy change for the reaction is 198 kjmol the minimum value of
a 420-g ball is attached to one end of a horizontal cord of length l 2 m and the other end is fixed as shown in the
two capacitors c1 190 microf and c2 300 microf are connected in series and a 30 v battery is connected across thema
the new hoover dam bridge connecting arizona and nevada opened in october 2010 see figure below it is the highest and
a draw a lewis structure for cn- where the bonding occurs along the x-axis be sure to include all lone pairs and formal
a 65 g bullet is fired from a rifle having a barrel 0560 m long assuming the origin is placed where the bullet begins
a man riding a bicycle 140kg together is traveling at 86 ms due north when he is brought to a stop in 50 seconds by a
in titration experiment 214 ml of 0987 moll formic acid is required to neutralize 174 ml of barium hydroxide the
a rectangular container measuring 20 cm 52 cm 73 cm is filled with water what is the mass of this volume of water in
the buffer solution consists of 01 moll of sodium acetate and 15 moll of acetic acid the ka of acetic acid is 18x10-5
a race car goes around a level circular track with a diameter of 100 km at a constant speed of 77 kmh what is the cars
a man pushes an 800 n crate a distance of 500 m upward along a frictionless slope that makes an angle of 30o with the
if a loop of chain is spun at high speed it can roll along the ground like a circular hoop without collapsing consider
a buffer solution consists of 15 moll of sodium acetate and 15 moll of acetic acid the ka of acetic acid is 18x10-5
ball at rest in your reference frame has a mass m a second ball with the same mass is moving with speed v and collides
intensity level prooduced by a jet airplane at a certain location is 150 dba calculate the intensity of the sound wave
the concentration of sodium cation in a 073 moll solution of sodium carbonate is which of the following note assume