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The barometric pressure in a cavern was measured using a mercury barometer. A value of 74.2 cm of Hg was obtained. How many atmospheres is this
Determine the empirical formula of a compound that is 36.86% N and 63.14% O by the mass
Acetic Acid has a pKa of 4.76. Starting with a 1.0M solution of sodium acetate, and a 1.0M solution of acetic acid, what volume of each is required to make 1.0 liter of a 1.0 M solution buffered at
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates
Consider a saturated solution of calcium fluoride in 0.039 M potassium nitrate. Complete the following tasks, and then answer the question. Write the chemical equation corresponding to Ksp.
A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. Find the height (yi) from which the rock was launched
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
Mendeleev ordered the elements in his version of the periodic table on the basis of atomic masses instead of their atomic numbers. why
An observation satellite orbits the planet at a height of 1000. What is the projectile's speed as it passes the satellite
Include constitutional isomers expect those with C-C double or triple bonds. For each constitutional isomer identify the functional group and identify if they are stereoisomers other than conformers
We want to change the volume of a fixed amount of gas from 725ml to 2.05L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 110kpa
What kinetic energy must the electrons have in order to resolve a protein molecule that is 3.80 nm in diameter? Take the mass of an electron to be 9.11× 10-31 kg.
A cylinder is labeled "PENTANE." When the gas inside the cylinder is monochlorinated, five isomers of formula C5H11Cl result. Was the gas pure n-pentane, pure isopentane, pure neopentane
In order to drop a Pyrex glass marble 1.003 in diameter through the hole in the plate, how much must the temperature of the system be raised
Amitriptyline is a tricyclic antidepressant that is also a weak monoprotic base. A clinical chemist wishes to extract this drug with chloroform from a blood sample for analysis
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2. How much energy is received by the eardrum per second
if I have .42N NaOH and the stoiometry between Oxalic acid and Naoh is 1:2 then does that mean i do .42/.5=mol Oxalic acid * vol of titrations = molarity of oxalic acid
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have
A helicopter rises vertically with a constant upward acceleration of 0.38 m/s^2. How soon does the wrench hit the ground
Can someone explain how to do these? I feel like the first one is E as KOH and HCL are strong base/strong acid.
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. what is the magnitude of the average current in this region
of 3M sodium acetate and water would you use to make 10ml of a 0.25M solution of sodium acetate? Show the calculations.
On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.15 m/s2. What force does the trailer exert on the car
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. How much charge ends up on sphere C