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how do you know when an element that is by itself has an oxidation number of zero or its
the half-life of sr-90 is 29 years what fraction of the atoms in a sample would remain after 100 years how would you
a 050 mass is attached to a spring with a force constant of 27 and released from rest a distance of 33 from the
what is adsorption isotherm and desorption isotherm and hysteresis list the important applications of sorption
an object executing simple harmonic motion has a maximum speed of 44 and a maximum acceleration of 0661 find the
suppose your dorm room is 13 ft wide by 15 ft long by 85 ft high and has an air conditioner that exchanges air at a
an unknown metal m reacts with oxygen to give the metal oxide mo2 identify the metal based on the following
a hoop and a disk both of mass 18 kg and radius of 02 m roll without slipping up a straight incline with an initial
an unknown material begins to emit electrons from its surface when exposed to photons with wavelengths shorter than 540
a test tube contains 290x10-4 m3 of liquid carbon tetrachloride 1240x10-6 cdeg-1 at a temperature of 820degc the test
the abundance of deuterium in water is 00150 howmany moles of water would be required to obtain 00760 moles of
after hitting a long fly ball that goes over the right fielders head and lands in the outfield the batter decides to
calculate the amount of copper sulfate in solution formed by the reaction of500g of elemental copper with excess silver
a 101 frisbee is 22 in diameter and has about half its mass spread uniformly in a disk and the other half concentrated
calculate the temperature in k where the specific heat of carbon dioxide is 093 kjkgk if the temperature dependence of
a 021-kg pinecone falls 10 m to the ground where it lands with a speed of 13 msa how much work was done on the pine
1 a sample of propanec3h8 is placed in a closed vessel together with an amount of o2 that is 250 times the amount
the full diameter of a wheel is 99 and its rotational inertia is 61 what is the minimum mass it could have how could
a string is wrapped tightly around the circumference of a wheel with a mass of 123kg and a radius of 324m the string is
a u-tube manometer indicates a pressure drop of 10 inches water across an air filterthe air is at 26 degrees celsius
a research submarine is designed to operate 3 km below the ocean surface if the interior pressure is 1 atm what is the
a liquid is used to make a mercury-type barometer as described in section pressure in a fluid the barometer is intended
the eq established when 2 moles of muck s are added to a 1 l solution of 3 moles of slop dissolved in slime l producing
a solenoid that is 102 cm long has a cross-sectional area of 163 cm2 there are 980 turns of wire carrying a current of
a 94-g sample of powdered titanium was added to a graduated cylinder originally containing 68 ml of water after