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1. If it takes 75 min for the concentration of a reactant to drop to 25% of its initial value in a first order reaction, what is the rate constant for the reaction in units min^-1?
2. If the initial concentration of the reactant in a first order reaction is .5 mols/L and the half life is 500 seconds, calculate the concentration of the reactant 1200 seconds after initiation of the reaction?
3. If Ea for the forward reaction is 321kj and the Ea for reverse reaction 390jk, what is the DeltaH for the reaction? Is it exothermic or endothermic?
How much heat is required to heat 410g of copper from 25degree C to 200degree C?
What is the heat change of H 2 O If the final temperature of the mixture = 25 degree celsius?
Calculate the CO3- concentration of a 5.45 x 10-4 M H2CO3 (carbonic acid) solution. Ka1 and Ka2 of carbonic acid are 4.3 x 10-7 and 4.8 x 10-11 respectively.
Assuming that the total pressure of the gases is 1.52 and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure (in atmospheres) of each gas.
write a short experiemental procedure that would allow the two ions to be separated and includes a confrimatory test for verifying the presence of each ion.
Classify the following solutions as saturated, unsaturated, or supersaturated, based on your graph. Note that c. and d. require you to convert from the concentrations give to g/100 g H2O before you refer to the graph.
Take N3 as the independent variable and solve for N2 in terms of N3. Then solve for N1 in terms of N2 and N3. b. Taking note that there cannot be a negative population, what are the possible values of N3 ?
A solution of water (Kf = 1.86 degrees C/m) and glucose freezes at -2.55 degrees C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 degrees C. Express the molal concentration numeri..
What mass of water (in g) would need to evaporate from your skin in order to dissipate 0.8 x 10 5 J of heat from your body?
Chemistry of Proteins and Hemoglobin - What is the effect of the following changes on the O 2 affinity of hemoglobin?
Does the body have an impact on the brain? If so, how much? What do you have to back up your position?
the pH of a saturated solution of a metal hydroxide MOH is 9.30. calculate the Ksp for the compound
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