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it takes 510nbspj to raise the temperature of an 900nbspg piece of unknown metal from 130nbsponbspc to 242nbsponbspc
a volume of 120 ml of h2o is initially at room temperature 2200 c a chilled steel rod at 200 c is placed in the water
the combustion of pentane c5h12 occurs via the reactionc5h12g8o2grarr5co2g6h2ogwith heat of formation values given by
a piston has an external pressure of 150 atm how much work has been done in joules if the cylinder goes from a volume
550 g of h2so4 reacts with 0065 g of calcium hydroxide in a calorimeter the initial temperature of the acid is 223oc
if the vant hoff factor for nacl is 185 what is the freezing point of a 068 molal nacl solution in waternbspkfnbsp
isotonic saline solution which has the same osmotic pressure as blood can be prepared by dissolving 1023 g of nacl in
the density of a certain metal is 3594 gcm3 and the metal atom radius is 2173 pm if the metal crystallizes in a
the chlorofluorocarbon ccl2f2 was once used as a refrigerant what mass of this substance must evaporate to freeze 2 mol
1972 g of gold at 4500oc is dropped into 1500 ml of water at 200oc the final temperature of the water and the gold at
350 ml of a 10 m cuso4 solution is left on the counter and allowed to evaporate cuso4s saturation solubility point is
1 o2 is generated into a 250ml beaker by water displacement at a pressure of 730 torr and a temperature of 25c what is
2h2 g o2g-------gt 2h2o1 how many liters of water can be made from 55g of o2 and excess hydrogen gas at stp2 what
a sample of gas is contained in a balloon which has a volume of 2l a pressure of 900 torr and a temperature of 27c the
1 at 29c and 756 torr a gas occupies 250l if the temperature is increased to 159c and the pressure is increased to 1550
1 a holding vessel contains a sample of gas at 174 atm 770 l and 291 k if the vessel shifts to maintain the pressure at
a solution is prepared by dissolving 383 g of a protein in enough water to make up 10 l in volume if the osmotic
what is the vapor pressure of an aqueous solution containing 12 by weight ethylene glycol 62 gmol at 25oc ph2o 243 torr
identify important occupational exposure limits oels associated with at least 3 common oxidizers identify psm
a sample of gas has a mass of 0331g its volume is 0225 l at a temperature of 55c and a pressure of 886 mmhg find its
are all reactants andor products in a chemical reaction necessarily represented in the equilibrium expression why or
acid rain causes an increase in the ph a measure of acidity in bodies of water it has been proposed that calcium
given the following experimental data find outa what is the rate law of the reactionb what is the rate constant for the
a buffer is made by adding 024 mole acetic acid and 016 mole sodium acetate in 1l watera what is the ph of the buffer
the ka of formic acid hcooh is 18x10-4 what is the ph of 035 m solution of sodium formate