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Which is the weakest oxidizing agent? Which is the strongest oxidizing agent? Name the elements or ions that can be reduced by Pb(s).
A chair of weight 90.0 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at an angle of 35.0below the horizontal and the chair slides
The flask was then shaken until the solution was uniform. A 25.0-sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?
A 1.55 sample of propane, C3H8, was burned ina bomb calorimeter whose total heat capacity if 12.3kJ/ degrees Celsius. The temperature of the calorimeter plus its contents increased form 21.36 degree
If 24 mL of 7.0 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?
A hot-air balloon is descending at a rate of 1.5 when a passenger drops a camera.If the camera is 41 above the ground when it is dropped, how long does it take for the camera to reach the ground?
Calculate the initial concentration of H2O2 and KI for each run (trials 1-7). use the concentrations and volumes below:
if 135 g of steam at 100 degrees C and 475 g of ice at 0 degrees C are combined, what is the temperature of the resultant water, assuming that no heat is lost?
A car is traveling at 28 m/s when the driver spots a large pothole in the road a distance 25 m ahead. She immediately applies her brakes. If her acceleration is -6.9 m/s2, does she manage to stop be
How do you calculate the mass of magnesium that is required to produce 35.8ml of hydrogen gas at 28°c and a barometric pressure of 745 mmHg when collected over water?
How much rations must the hiker consume to avoid a reduction in body temperature of 4.0 K as a result of heat loss? Assume the heat capacity of the body equals that of water. Assume the
What is the mole fraction of ethanol in a solution made by dissolving 14.6 g of ethanol in 53.6 g of water?
A nuclear power plant operating at 40.0% efficiency produces 1072 MW of usable power. What is the energy in joules released by the fission of a single uranium-235 atom?
Thomas poured 25 mL of 0.60 M HCl into a large bottle. He then added enough water so that the new (diluted) concentration was 0.10 M HCl. How much water did Thomas add?
How many molecules of carbon dioxide are produced when 130 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water
A frictionless pulley with zero mass is attached to the ceiling, in a gravity field of 9.80 m/s2. Mass M2=0.100 kg is being accelerated downward with a=1.10 m/s2. Calculate the mass m1
The half-life of C-14 is 5730 years. A 3.4 g sample of bone has 33.3 disintegrations per minute. How old is the bone sample in years?
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C.
If the volume of a container is 69.4 L. and the container holds a gas at 23.2 oC. and 7.00x104 mmHg. The density of the gas is 16.88 g/L.
Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme
An under damped harmonic oscillation has its amplitude reduced to 1/10thof its initial value after 100 oscillations. If its time period is 1.15s then calculate (i)damping constant (ii) relaxation ti
A sample contains BaCl2.2H2O and NaCl. After 0.678 g of sample was heated and residue weighted 0.648 g. What is the percent of BaCl2.2H2O in the sample?
Buffer capacity = moles of H+ or OH consumed/ change in ph x volume of buffer solution. Okay how do I find the moles of H+ or OH consumed?
0.780 g of aluminum sulfate was mixed with 0.400 g of barium chloride. A white precipitate barium sulfate was formed.
If you take a 10.5mL portion of the stock solution and dilute it to a total volume of 0.350 L, what will be the concentration of the final solution?