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Gold can be hammered into extremely thin sheets called gold leaf. If a 1.00-g piece of gold (density= 19.32 g/cm3) is hammered into a sheet measuring 8.0 x 5.0 ft, what is the average thickness of
In a 3.0-L vessel the following partial pressures are measured at equilibrium: N2: 0.380 atm; H2: 0.400 atm; NH3: 3.00 atm. Hydrogen is removed from the vessel until the partial pressure of nitrogen
Calculate how long our sun will be a red giant assuming that this luminosity is caused only by the fusing of hydrogen, that only 40% of the Sun's original supply of Hydrogen is fused during the red
A skateboarder, starting from rest, rolls down a 13.0 m ramp. When she arrives at the bottom of the ramp her speed is 6.00 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.
A voltaic cell with Mn/Mn2+ and Cd/Cd+ half-cells has the following initial concentrations: [Mn2+]=0.090 M; [Cd2+]=0.060 M. What is the initial Ecell? What is Ecell when [Cd2+] reaches 0.0050 M? Wha
Carbonyl sulfide (COS) is a trace component in the atmosphere. One difficulty in studying chemical reactions of this molecule is that it spontaneously decomposes into carbon dioxide (CO2) and carbon
A room measures 1.0 m by 3.8 m by 5.9 m. The heating and air-conditioning ducts to and from the room are circular with diameter 0.30 m and all the air in the room is to be exchanged every 15 min. (
Your friend's 13.5 g graduation tassel hangs on a string from his rearview mirror. When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car at an angle of 5.90
A 1.423 g sample of a weak monoprotic acid is titrated with a 0.1383 M solution of NaOH, a strong base. After 37.65 mL of the NaOH solution has been added the equivalence point for the titrati
A sailboat is sailing due east at 5.00 mph. The wind appears to blow from the southwest at 14.2 mph a. what is the true wind speed
Lactic acid (HC3H5O3, M = 90.1 g/mol) is a weak monoprotic acid, with Ka = 1.4 x 10-4 at T = 25.0 °C. Potassium lactate (KC3H5O3, M = 128.2 g/mol) is the potassium salt of the conjugate base of
A major leaguer hits a baseball so that it leaves the bat at a speed of 30.5 m/s and an angle of 35.4 above the horizontal. You can ignore air resistance.1) What is the magnitude of the baseball's v
IF the naturally occurring level of hydrogen-3 (half life=12.6 years) in fresh wines is 535 d min/L (decay events/minute per liter) what would the expected hydrogen-3 activity in a bottle of wine c
A chair of weight 140 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F= 44.0 N directed at an angle of 39.0 degrees below the horizontal and th
If the proton proton chain is the only nuclear reaction that happens in a star, what is the total number of Hydrogen nuclei in the core of this star? How much energy is available in each Hydrogen nu
When 12.1g of the sugar sucrose (a non-electrolyte) are dissolved in exactly 800g of water, the solution has a freezing point of -0.082 degrees Celsius. what is the molar mass of sucrose? Kf of wat
You are swinging your younger sister in a horizontal circle of radius 0.65 m. Her mass is 21 kg and you arrange it so she makes one revolution every 1.5 s. (a) What is the magnitude and direction o
Into an evacuated 30L vessel is placed 0.1mol of n-butane dissolved in 0.9mol of n-hexane. if the vessel and its contents are kept at 298K, what is the pressure and the vapor and liquid compositions
For a certain transverse wave, the distance between two successive crests is 1.20 m and eight crests pass a given point along the direction of travel every 13.50 s. Calculate the wave speed.
An electron, initially traveling in the +x-direction with a speed of 4 x 105 m/s, enters a uniform electric field directed vertically upward. After traveling in this field for 3.5 x 10-7 s, the electr
By looking at the formula one might conclude that CO would have a large dipole moment, wen in fact it has a very small one. Based on the electron arrangement and the formal charge distribution, exp
Two ping-pong balls each have a mass of 2.7 g and carry a net charge of 0.430 µC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is
What is the molarity of a hydrocholric acid solution if 20.00 ml of HCL is required to neutrilize .424 of sodium carbonate (105.99 g/mol)
Nitric acid is a strong acid , ammonium hydroxide is a weak base, and ammonium nitrate is a soluable salt, What is the net ionic equation for the reaction below?
At what time does the hour hand point in the same direction as the electric field vector at the center of the dial? (hint: use symmetry)