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Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed to react completely with 18.7 g of sulfur to form sulfur hexafluoride?
Phosphate ons are a major pollurant of water supplies. They can be removed by precipitation using solutions of Ca2-ions becasue the Ksp of calcium phosphate is 2.0 x10-29 .
What is the average velocity of the student during his walking? What is the average speed that the student was moving?
How many unpaired electrons does gadolinium have and which orbitals arethey in? Provide the electron configuration as part of your answer.
Unpolarized light passes through two polarizers in turn with polarization axes at 50° to one another. What is the fraction of the incident light intensity that is transmitted?
After the collision, the 0.228 kg puck has a speed of 1.96 m/s at an angle of 26 to the positive x axis. Determine the velocity of the 0.391 kg puck after the collision.
The specific heat capacity of silver is 0.24 J/oCg. It takes 1.25 kJ of heat energy to raise the temperature of sample of silver from 12.0 oC to 15.2 oC.Calculate the mass of the sample of s
A diver jumps from rest at the top of a platform that is h = 6.0 m above the surface of a pool. She penetrates the water to a depth d = 2.5 m before coming to rest again. Her mass is m = 55 kg. Fin
A drop of Methyl Orange was added. For this indicator the solution will be Red in high concentration ofH3O+ , and solution will turn yellow in high concentration of H3O+
After passing this section the block slides head on into a spring. The block momentarily stops after compressing the spring by d. The block initial speed is vo, the height difference is h, and the
What is the Ksp for lithium tetraborate if 50.0 mL of saturated solution of lithium tetraborate requires 9.11 mL or 0.511M HCL totitrate the tetraborate ion?
If the string is tuned to 520 Hz and the violinist puts a finger down on the string one-eighth of the string length from the neck end, what is the frequency of the string when the instrument is play
Describes the force, where Fx is in newtons and x is in meters. As the particle moves along the x axis from x = 1.08 m to x = 6.50 m, calculate the following. The change in the potential energy of t
In a neutralization experiment 35 ml of 1.0M ofHNO3 was mixed with 50 ml of 1.0M of NAOH. How many moles of nitric acid was neutralized?
Determine the work done by the gas on the bullet as the bullet travels the length of the barrel.
A combination of Magnesium atom and Oxygen atom results to Magnesium oxide, with the chemical formula MgO. What is the name for a combination of Magnesium and Nitrogen?
The intensity of the sunlight that reaches Earth's upper atmosphere is approximately 1310 W/m^2. (a) What is the total average power output of the Sun, assuming it to be an isotropic source?
An 85 gram bullet is shot at a 3 kg piece of wood at rest on the end of a counter 1.2 m high. If the bullet becomes embedded in the block and they land 5 m from the counter, what was the initial spe
The initial speed of the skier is 8.78 m/s. After coasting a distance of 1.10 m up the slope, the speed of the skier is 4.86 m/s. (a) Find the work done by the kinetic frictional force that acts on
If an archaeologist finds anancient firepit containing partially consumed firewood, and the14C content of the wood is only 22.5% that of an equal carbon sample from a present-day tree, what is the age
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 760 N, and his speed at the bottom of the pole is 3.5 m/s.
What mass of sodium fluoride must be added to 250. ml of a0.100 M HF solution to give a buffer solution having a pH of 3.50 ?ka(HF) =7.1 x 10^-4
(a) When the internal resistance is adjusted for maximum power transfer, what is the efficiency? (b) What should be the internal resistance for maximum possible efficiency?
Calculate the value of the reaction quotient, Qp, at 25C for this reaction when the pressure of nitrogen is 2.9atm, the pressure of hydrogen is 1.3atm, and the pressure of ammonia is .70atm.N2
A 46.3-g golf ball is driven from the tee with an initial speed of 41.4 m/s and rises to a height of 24.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest po