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500.0 mL of 0.160M solution of H3PO4 is combined with a 300.0 mL of a 0.245M solution of Ba(OH)2. What is the maximum mass of solid Ba3(PO4)2 that can be collected
A Garden hose with a cross sectional area of 3.2x10^-4 m^2 is used to fill up a bucket with a volume of 6.5x10^-2 m^3 in 25 seconds
Which is the electrophilic site in the following compounds. A. CH3Cl B.H3C-O-CH3 with two lone pairs around O C. BH3. What is the nucleophilic site in each of the following molecules.
A solution 14.3 % (by mass) HCl. The density of the solution is 1.08 g/mL. What is the molarity of the solution
Find the absolute and percent relative uncertainty and express each answer with a reasonable amount of significant figures. 5.1(+-0.3) - 3.7(+-0.2) Need Numeric Result, Absolute Error, and Relative
It is produced natrually from degradation of organic matter, and also anthropogenically from fuel combustion.) The acid dissociation constant, Ka for formic acid is 10-3.7. Assume T=4*C and I=0.
A copper ion with a single electron (denoted Cu28+) is in an excited state with radius the same as that of the ground state of hydrogen. How much energy in eV is needed to ionize the ion from this ex
Determine the pH of a solution of 10-3 M sodium formate. Formate is a byproduct of microbial metabolism, and can also serve as an energy source for anaerobic bacteria
The current in the circuit if the speed v is 0.75 m/s , determine which end of the rod is positive.
Electrons have half integer spin, ms= +-1/2. consider how the elements would be arranged if electrons had spin of ms= +-3/2. redraw the first two rows of the periodic table using this new criterion
How many grams of salicylic acid and of acetic anyhydride should she use? refer to the following reaction: 2 C7H6O3 + C4H603 -> 2 C9H8O4 + H20
What is the angular separation of two spectral lines of wavelengths 446 nm and 398 nm formed in order m=2 with a 360 line/mm grating
In a separate experiment, an empty flask is weighed, 35.3 cm3 of the lubricating oil is poured into the flask and the flask is reweighed. If the scale reading was 124.8 g in the first weighing, what
Assume a ray of light is incident on an air / material boundary at 45 degrees to the normal. What is the critical angle for the material when it is surrounded by air
what are the relative energies of the orbitals defined by n=4? if this atom is placed in a magnetic field, how would the relative energies of these orbitals change and why
An electron and a positron, each moving at 3.0*10^5 m/s, collide head on, disappear, Determine the momentum of each photon
A standard deck of cards contains 52 different cards. How many different poker hands are there
If you have a 0.1M solution of weak acid X (pKa 3.5) and another 0.1M solution of weak acid Y (pKa 4.3), which solution would have the lower pH?
At standard atmospheric pressure, the solid form of carbon dioxide called "dry ice" undergoes a phase change not to a liquid, how much of the water will turn to ice by the time all the dry ice has sub
the signs of the unsquared wave functions are usually shown in plots of the squared functions. why is this so
When conducting recrystallization, the recrecrystallizing solvent must have certain characteristics (in terms of how its acts on the target sample and the contaminants)
What is the pH of a dilute solution of weak acid (pKa 5.6) with a concentration of 0.09M conjugate acid and 0.30 M conjugate base. What would the concentration of conjugate acid and conjugate base b
Which of the following compounds has the greatest Coulomb force. Which has the smallest? Enter the name of the compound.
Draw the Caryophyllene (C15H24) structure and then show how it fits the "isoprene rule" by circling the 3 isoprene units in the structure.
A gamma-ray photon produces an electron and a positron, each with a kinetic energy of 259keV, Determine the energy of the photon