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Lead is sold as tiny spherical beads called "shot". What is the average diameter (in mm) of a piece of lead shot, if 25 beads have a total mass of 2.31 g? Recall that the volume of a sphere is given by the formula (4/3) πr^3 and the density of lead is 11.3 g/cm^3.
The temperature of the calormieter increases from 19.7 C to 20.6 C if under constant volume condidions, the heat of combusion of glucose is -2805 kJ/mol
Determine the activation barrier for this reaction. What is the rate constant at 425 K?
Draw 2 resonance structures for the anion -CH2CHO formed from ethanol. Show all valence electrons as bonds or lone pairs and indicate any formal charges.
How can one mole of any gas have a volume of 22.4 liters if gases take up the volume of their container
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
average kinetic energy of 6410 J/mol under certain conditions, what is the root mean square speed of Cl2(g) molecules under the same conditions?
What is the activation energy for the reaction shown below k=1.89x10^-8 /s at 540 K and 2.45 x 10^-7 at 601 K
What is the whole body level of this metal if ingestion were maintained at ADI? [Hint: Atmospheric residence time analysis calculations are very similar.]
a system consisting of 57.5 g of liquid water at 298k is heated using an immersion heater at a constant pressure of1.00
The majority of industrial method for the preparation of elemental phosphorus is heating a mixture of phosphate rock, carbon, and sand in electric furnace. The chemical reactions can be represented by 2Ca3(PO4)2 + 6SiO2 ? 6CaSiO3 + P4O10 and P4O10..
If the rate constant at a particular temperature is 3.7*10^-6 mol/L*sec, how long will it take for an ammonia concentration to drop from an initial concentration of 5.0*10^-4 M to 5.0*10^-5 M? What is the half life of the reaction under these cond..
consider the following unbalanced reaction.p4s f2g -gt pf3ghow many grams of f2 are needed to produce 120. g of pf3 if
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