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A woman 6 feet tall walks at a constant rate of 5 feet per second away from a light that is 15 ft. above the ground. Find the length of her shadow. After another two seconds, find the length of her
A gas-filled balloon having a volume of 5.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°
What is the EMF measured at a platinum electrode, relative to the standard H2 electrode, in the solution that results from the mixing of the following:
When he reaches the opposite curb, what is the distance between the initial and final positions of the tip of his shadows?
What is the ratio of the value of a sphere and a cone with the base diameter and altitude of the cone equal to the diameter of the spehere? which one is it?
A metal worker is building a wire frame for a cubic box thatis to have a volume of 27 cubic feet. What is the total length of wire the metal worker will need?
Question: Technetium-99m (gamma emitter, t1/2 = 6.02 hr) is widely used for diagnosis in medicine. A sample prepared in the early morning for use that day had an activity of 6.17 x 10-6 Ci. What wil
He knows that one recipe of cream will cover 60 squareinches of cake. How many batches of the topping must he make to complete his torte?
An aqueous solution of copper(II) sulfate and an aqueous and an aqueous solution of sodium phosphate are mix together in a beaker. (a) write the balanced equation for the reaction that takes place,
Aqueous solutions of sodium hydroxide and iron(III) sulfate are mixed. write the balanced molecular equation for this reaction, including physical stated and names of products?
When a piece of solid Cu metal is put into an aqueous solution of HCL a gas of HCL a gas evolves and the solution turns blue(indicating formaiton of Cu^2+). what is the net ionic equation for this r
What is the surface area of the sphere to the nearest tenth? Find the area of a regular pentagon with a side of 6 ft. Give the answer to the nearest tenth.
If 484.7 mL of nitrogen gas, measured at 777.5 mmHg and 88.2oC, reacts with excess iodine according to the following reaction, what mass of nitrogen triiodide is produced?
The pressure at the mountaintop is 0.83 atm, and the midday temperature has reached 30 degrees celcius. What is the new volume of the water container?
How much metal trim is needed for the perimeter of the entire window, and how much glass is needed for the opening of the window?
A 25.0-L storage flask is filled with 247-mmHg of a gas at 30°C. If the total volume is increased to 45.5-L and the temperature is increased to 50°C, what is the resulting pressure in mmHg.
Assume that an extra 2 feet of wire are needed to attach the wire to the ring and the pole. What length of wire is needed for the job?
For the diatomic molecule F-Br the following values are known. Determine the partial charge on each element. (1D = 20.8 e-pm)
What is the length of the (inner lane of the track), including the circular legsx, and what is the area of the infield of the track?
Why does it take a temperature of almost ,800 degrees C to melt NaCl, but stirring in water at room temperature will also effect a break-up of the lattice?
Explain whether you expect the bond in each molecule to become stronger, weaker, or unchanged upon 1-electron oxidation and 1-electron reduction (HCL HF)
80 people enter the race, and they each pay an entry fee of $20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent.
A sample of KClO3 was heated and 350. mL of O2 was collected over water. What mass of O2 was collected? Room T = 23°C, P =675. mmHg.
When comparing the experimental IR spectra to the literature IR spectra of the same compound, the positions and strengths of some of the peaks were slightly different. Why is this so?
The vapor pressure of chloroform is 40.0 torr at -7.1 degree Celsius. Its enthalpy of vaporization is 29.2 kJ/mol. Calculate its normal boiling point.