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A small amount of the solid MgSO4 * 7H2O is put in a crucible. The solid is gently heated by a bunsen burner until all the waters of hydration are driven off.
The equation of oscillation of a mass-spring system is x(t) = 0.3cos(4t - 0.7) where x is in meters and t in seconds. The spring constant is 15N/m.
What amount of solid NaOH must be added to 1.0 L of a .15 M H2CO3 solution to produce a solution with [H+] = 3.5x10^-11 M? There is no significant volume change as a result of the addition of the s
A mass attached to a spring oscillates according to the equation: x(t) = 24sin(16t + 0.50) where x is in cm and t in seconds. Find (a) the velocity and acceleration of the mass when x = 6.0cm for th
Use the laws of classical mechanics to solve this problem. An atom of mass m moves in positive x direction with speed v. It collides with and sticks to an atom of mass n * m moving in positive y direc
A buffer is made up of 355 mL each of 0.200 M NaHCO3 and0.134 M Na2CO3. Enough water is added to thebuffer to make the total volume 10.0 L. Calculate the pH of the buffer after the addition of 0.030
A sample oxygen is collected over water and has a volume of7.84 ml. The pressure od the collected "wet" gas is 71.8 KPa andthe temperature is 20°C.
A square is 1.0 m on a side. Charges of +4.0 C are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 C and -3.0 C. What is the absolute potential in the
450 ml of helium whose temperature is 25°C and whosepressure is 850 torr is mixed with 600 ml of oxygen whose temperature is 22°C and whose pressure is 933 torr and the gasmixture is transfe
A car travels along a straight line at a constant speed of 51.5 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entir
An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 139 m/s^2 What is the magnitude of the electric field? What is the direction of the electric fie
A 6.9nC charge is located 1.7m from a 3.8nC charge. Find the magnitude of the electrostatic force that one charge exerts on the other and is the force attractive or repulsive? Please show work.
You are driving through town at 12 when suddenly a car backs out of a driveway in front of you. You apply the brakes and begin decelerating at 3.3 . (a) How much time does it take to stop?
"Glycemic index" is a popular, though controversial measurementof how quickly glucose is released from starchy foods into the blood during digestion.
Water flows at a rate of 25 L/min through a horizontal 7.0-centimeter-diameter pipe under a pressure of 6.0 Pa. At one point, calcium deposits reduce the cross-sectional area of the pipe to 30 cm^2.
Phenol, C6H5OH, is a weak organic acid.Suppose 0.515g of the compound is dissolved in exactly 125 mL ofwater. The resulting solution is titrated with 0.123 M of NaOH.
Lithium hyydroxide is used in the space program to removecarbon dioxide (from respiration) is spacecraft. Specifically,lithium hydroxide. LiOH, reacts with carbon dioxide, CO2 to formlithium carbona
Point charges of 7.50 are situated at each of three corners of a square whose side is 0.500 . What is the magnitude of the resultant force on a point charge of -1.50 if it is placed at the vacant corn
A source is generating circular waves on the surface of a lake. The waves have a wavelength of 14.9m and travel outward at a speed of 6.73m/s. You are in a boat whose speed is 4.38m/s and heading di
The standard enthalpy ofvaporization for C2Br2F4 is 104.64 J/g at its normal boiling pointof 47.26°C. Calculate the standard entropy of vaporization (ΔS°vap)of C2Br2F4(l).
Let's think about what electronic structure means. If Ihave the electronic structure of an atom, what information do Iknow about the electrons in the atom? (there are two different pieces informatio
Rotational absorption lines from 1H35Cl gaswere found at the following wavenumbers: 83.32, 104.13,124.73, 145.37, 165.89, 186.23, 206.60, 226.86cm-1.
An astronaut floating in space is separated from his ship. his mass is 85.0kg and he is 10.0m for his ship. he throws a wrench mass is .800kg in opposite direction with a velocity of 20.0m/s. How lo
A sample of air contains 72.75%nitrogen, 26.45% oxygen, 0.05% carbon dioxide, and 0.75% argon, byvolume. How many molecules of each gas are present in 1.00 L of thesample at 25°C and 1.00 atm?