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Q.1 A sample of an unknown compound was analyzed and was found to contain 0.0894 moles of silver and 0.0447 moles of sulfur. What is the formula of the compound? What is the name of the compound?
Q.2 A sample of an unknown compound was analyzed and was found to contain 1.49 grams of iron and 6.37 grams of bromine. What is the formula of the compound? What is the name of the compound?
Q.3 A sample of an unknown compound was analyzed and was found to contain 0.351 grams of water and 1.27 grams of CoCl2. What is the formula of the compound (written as a hydrate)?
Q.4 Convert 0.1825 moles of strontium nitride to masses in grams.
a 2.0-nc point charge is placed at one corner of a square 1.5 m on a side and a -3.0-nc charge is placed on a corner
A recent study of 280 people showed that between about 70 and 80 percent of Americans over 60 do not have enough savings to retire.
A catapult throws a projectile at a castle, but it lands 5.00 m short of the castle wall. The position of the projectile as a function of time is given by the equation r→(t) =(21.7m/s)t i^ + [(12.5m/s)t - (4.90m/s2)t2]j^. What is the average veloci..
A uniform magnetic field of 116 mT passes through a loop of wire having an area of 0.023 m2. Evaluate what is the magnetic flux through the loop
What is the wavelength of the emitted photon? Compare this wavelength associated with the transition from the third level to the ground state level hydrogen.
A solid spherical ball rolls 7.0 meters without slipping along a ramp inclined at 35 degrees to the horizontal
A satellite in a circular orbit around the earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. Calculate the amount of that work converted to heat
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature, What is the specific heat capacity of the unknown metal
Jamie pulls a box of 1.0 kg mass up an inclined plane by a constant force of 10 N that causes a displacement of 0.50 m. What is the work done by the normal force on the object
The specific heat of copper is 0.386 J/goC. Find what is the amount of heat necessary to warm up 100 gram of copper from 200C to 400C
suppose that they have same internal energy, which will have a higher temperature: a metal knife in thermal equilibrim with a hot griddle or a 1kg block of ice at -25C or seven 12g ice cubes at -25C.
a coin is placed 18.0 from the axis of a rotating turntable of variable speed. when the speed of the turntable is
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