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Calculate the pressure (in pascals and atmospheres) exerted by a mass of 1.0 kg pressing through the point of a pin of area 1.0 x 10-2 mrrr' at the surface of the Earth. Hint. The force exerted by a
If 162 of wet is collected over water at 24 and a barometric pressure of 736 , how many grams of have been consumed? (The vapor pressure of water is 22.38 .)
How much (in grams) of the buffer (benzoic acid), would you add to the 900.0 mL of buffer to change its pH to 3.83?
Briefly explain you conclusion regarding each student's work. Detailed pH calculations are not required. KB of NH3 = 1.8 x 10 M ; KA of HA = 1.8 x 10 M.
What is the literature Ksp value for potassium hydrogen tartrate at different temperatures?
Solid aluminum reacts with aq H2 SO4 to form H2 gas and aluminum sulfate. when a sample of Al reacts, 425 mL of H2 gas is produced at 24 degree celsius at a press of 744 mmHg. How many grams of Al
A piece of galena has a volume of 3.9 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
The molar heat of fusion of aluminum metal is 10.79 kJ/mol, whereas its heat of vaporization is 293.4 kJ/mol. What quantity of heat would be required to vaporize 1.68 g of aluminum at its normal boili
For each of the following sets of pressure/volume data, calculate the new volume of the gas after the pressure change is made. Assume that the temperature and the amount of gas remain the same.
At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr?
How much limestone must be decomposed by heating to produce 250.0 grams of lime, CaO?assuming that the limestone contains 95.0% pure CaCO3.
When the equilibrium is reached, what are all of the concentrations in solution (this is also called the equilibrium composition)?
What will be the concentration of rm H_2SO_4 in the battery after 2.40 A of current is drawn from the battery for 8.00 hours?
What does this chemical formula mean? Can you break it down bit by bit?
What volume of hydrogen gas (measured at STP) would result from reacting 75.0g of sodium hydroxide with 50.0g of aluminum?
Propose a rationale for the lack of reactivity of esters toward sodium borohydride. Propose a rationale for the greater reactivity of lithium aluminum hydride over that of sodium borohydride
1.) Half reactions: What is the oxidation and reduction for the following formula: 3 Mg + N2 → Mg3N2
How many grams of sodium sulfide are formed if 1.60 of hydrogen sulfide is bubbled into a solution containing 2.13 of sodium hydroxide, assuming that the sodium sulfide is made in 93.0 yield?
If you ingest a vitamin C tablet containing 1.27 x 1022 carbon atoms, what was the mass, in milligrams, of the tablet, assuming that the tablet is 100% pure?
No crystals form on cooling, and so the student pours out the solution and starts the experiment over. Have the carbon, hydrogen, nitrogen and oxygen atoms of the acetaminophen been destroyed? If so
A student sets up two reactions. Reaction 1 uses 0.190 mol/L of reactant, and Reaction 2 uses 0.470 mol/L of reactant. How many times faster is Reaction 2 compared to Reaction 1?
When 0.060 mol of propionic acid, C2H5CO2H, is dissolved in 500 ml of water, the equilibrium concentration of H3O+ ions is measured to be 2.41 x 10-3 M. What is Ka for this acid?
A 31.0-g sample of water at 290. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Suppose the thermometer is miscalibrated to read .3 degrees C higher than actual. what effect does this error in calibration have on the general molar mass of the compound, explain.