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By reference to the Cu cycle lab experiment, identify the false statements among the following:
i) Metallic copper reacts with nitric acid but not with hydrochloric acid because CuCl2 is insoluble in water whereas Cu(NO3)2 is soluble.
ii) When copper reacts with nitric acid, both nitrogen dioxide and hydrogen gas are produced.
iii) Copper does not react with hydrochloric acid but does with nitric acid because the latter is a stronger oxidizing agent.
iv) When Zn reacts with nitric acid, the only gas produced is hydrogen gas.
v) Metallic Zn is a stronger reducing agent than metallic copper.
A pole-vaulter is nearly motionless as he clears the bar, set 4.2m above the ground. He then falls onto a thick pad. What is his acceleration as he comes to rest on the pad
a person reading a european newspaper finds that the low temperature the night before in stockholm was -16 degree
A thin spherical shell has a radius of 4 m and a mass of 225 kg, and its center is located at the origin of a coordinate system. find the gravitational force of attraction between the two shells
A vibrating string with a uniform linear mass density exhibits a single-loop standing wave pattern with a frequency of 600 Hz. determine the ratio of the new tension to the old
The Calorie (or kcal) is another energy unit and is commonly used to measure food energy (as well as heat). How many Calories would you burn walking up a flight of stairs for an hour
A roller coaster moves 200 feet horizontally, then rises 135feet at an angle of 30.0 degree above the horizontal. compute the roller coasters displacement from its starting point
The black hole at the center of the Milky way galaxy is estimated to contain about 4 million solar masses. (msun= 2 x 1030 kg), What is the Schwarzchild radius of our galaxy's black hole
When our sun runs out of fuel, it will eventually become a white dwarf star with about the same radius as the earth. Estimate the sun's rotational period when it is that size
A 603.7-W space heater is designed for operation in Germany, where household electrical outlets supply 230 V (rms) service. What is the power output of the heater
Rare 1918 "Jenny" stamp, depicting a misprinted, upside-down Curtiss JN-4 "Jenny" airplane, was sold at auction for $525,000. A collector uses a simple magnifiying glass to examine the "Jenny," obtaining a linear magnification of 2.4 when the stam..
suppose a large crate of 300kg is hung from a uniform steel beam of mass 100kg and 2 meters in length. what would be he initial angular acceleration of the beam
What is the value of the force?
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