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vanillin used to flavor vanilla ice cream and other foods is the substance whose aroma the human nose detects in the
a nickel crystal is used as a diffraction grating for x-rays then the same crystal is used to diffract electrons if the
a bimetallic strip 68cm by 1cm by 001cm has aluminum alpha 23 x 10-6 1c on one side has steel alpha 12 x 10-6 1c on
a solution containing 100 mmol cacl2 is diluted to 1 l calculate the number of grams of cacl2 2h2o per milliliter of
a farmer applies 17000 kg of a fertilizer that contains 100 of nitrogen to his fields each year fifteen 150 percent of
in biological cells that have a plentiful supply of o2 glucose is oxidized completely to co2 and h2o by a process
a camber carriers her drinks in an ice chest made of styrofoam the chest is 40 cm x 45 cm x 70 cm and the walls and lid
mercury is a 6th row and zinc is a 4th row transition metal if ionization energy depends upon effective nuclear charge
a certain ideal gas has a value of constant y which is cpcv 43 what is the molar specific heat at constant
copper has two naturally occurring isotopes63cu isotopic mass 629396 amu and 65cu isotopic mass 649278 amu if copper
one of the most efficient engines built so far has the following characteristics combustion chamber temperature
1 which of the following statements concerning the carbon dioxide molecule is correcta the molecule contains two sigma
a heat engine operating between 40 c and 380 c has an efficiency 60 of that of a carnot engine operating between the
consider the reaction that describes the haber process for the production of ammonia for which kc at 300oc is 95
the peregrine falcon has been measured as traveling up to 350 in a dive if this falcon could fly to the moon at this
a heat engine has an efficiency of 650 and receives 150 j of heat per cycle how much work does it perform in each
one mole of an ideal gas at 1 atm and 0 c is compressed isothermally from 50 l to 20 l during this process energy is
draw the structures of the products of the neutralization reaction between pyridine and propanoic acid include lone
a volume of nitrogen gas has a density of 115 kgm3 and a pressure of 107 atm find the temperature of the gas and the
the following molecular equation represents the reaction that occurs when aqueous solutions of leadii nitrate and
two wires are identical except that one is aluminum and one is gold the aluminum wire has a resistance of 018 what is
a 10-m plank is being moved by rolling it over two cylindrical logs placed 2 m from either end of the plank as the
draw the structures of the products of the neutralization reaction between methylamine and acetic acid include lone
a horizontal 810-n merry-go-round of radius 160 m is started from rest by a constant horizontal force of 50 n applied
two identical point charges q 670 10-6 c are fixed at diagonally opposite corners of a square with sides of length