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a experiment would also work using another reactive metal such as zincif you had used the same number of grams of zn as
a 35 m string is stretched between a pulley and a wave generator consisting of a plate oscillating up and down with
the far point of a nearsighted person is 63 m from her eyes and she wears contacts that enable her to see distant
if the amount of gas collected had not been corrected for the presence of water vaporwhat effect would this have had on
a woman can read the large print in a newspaper only when it is at a distance of 59 cm or more from her eyesa is she
using the reduction potentials given calculate the equilibrium constantk at 25 degrees celsius for the reactionag aq
a galvanic cell is composed of these two half cells co2aq 2e- cos -028 volt cd2aq 2e-cds -040 volt the actual
we mixed up some unknown mass of ice at 0 c with 1 kg of steam at 100 c and soon established thermal equalibrium at 55
a heat engine expels its waste at 300 c and has a carnot efficency of 25 without changing its intake temprature what
given actual yield of aspirin147g percent yield518 theoretical yield 284 1 a how many grams of aspirin were lost in the
1 a pair of cylindrical shoes each having a radius of 1 m and height of 5 cm are designed to allow a person to
1 a syringe has a plunger that has a radius of 05 cm a 2 cm long needle is attached the opening in this needle
1 a giraffe has a large blood vessel running down its leg this blood vessel descends 25 m from the heart the
the molar volume of a certain solid is 142 ml at 1 bar and 42715k its melting temperature the molar volume of the
the light source for a double slit experiment has a wavelength of 590 nm the slit separation is 012x10-3 a screen is
a 150 g copper bowl contains 220 g of water both at 200ordmc a very hot 300g copper cylinder is dropped into the water
when steam condenses to liquid water 226 kj of heat is released per gram the heat from 168 g of steam is used to heat a
explain why recrystallization as a general technique is usually effective at removing a few percent of impurity even
the generator at a power plant produces ac at 23000 v a transformer steps this up to 335000 v for transmission over
a lens is used as a magnifier to view an ant placed on a piece of paper the image of the ant is 15cm from the lens and
a body of mass 18 kg makes an elastic collision with another body at rest and continues to move in the original
a 50 g ice cube floats in 200 g of water in a 100 g copper cup all are at a temperature of 0degc a piece of lead at
a student drops two metallic objects into a 120 g steel container holding 150 g of water at 25degc one object is a 240
consider the titration of 500 ml of 0100 m hc3h5o2 by 0100 m koh for the following questions ka for hc3h5o2 13 x 10-5
a 100 g aluminum calorimeter contains 250 g of water the two substances are in thermal equilibrium at 10degc two