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a solution is prepared by dissolving 478 g of an unknown nonelectrolyte in enough water to make 0500 l of solution the
at a pressure of o2 of 100atm the mole fraction of dissolved o2 in water is 16x10-5 at 333 k what mass of o2 mm 320
a solution of silver nanoprisms that are approximately 40 nm in length displays a purple color calculate the number of
using your knowledge of ph and solubility predict what the charge would be on the amino acid phenylalanine at ph 20 130
a 00623g sample of cobalt sulfate was dissolved in dilute hcl and treated with 10 bacl2 solution the baso4 precipitate
a chain of length l and total mass m is released from restwith its lower end just touching the top of a table find the
you are given a compound with an unknown concentration and you have five samples with known concentration of the
classify each of the following redox reactions as a combination decomposition or displacement reaction give a balanced
a thermos contains 150cm3 of coffee at 85 celsius to coolthe coffee you drop two 11-g ice cubes into the thermos the
calculate the ph of a solution made from 100ml of 010m hcl 200ml of 0050m naoh and 300 ml of 020 m nacl ka for hac if
a 100-coil spring has a spring constant of 380 nm it is cut intofour shorter springs each of which has 25 coils one end
the shock absorbers in the suspension system of a car are in suchbad shape that they have no effect on the behavior of
the front and rear sprockets on abicycle have radii of 900 cm and 510 cm respectively theangular speed of the front
a 30 kg block slides down a plane inclined200 to the horizontal with a coefficent of kinetic frictionbetween the block
how many grams of baking soda nahco3 are needed to react with 205 ml of stomach acid having an hcl concentration of
raw sewage is raised vertically by 549m in the amountof 189106 liters each day if the average density ofthe sewage is
three identical masses of 620 each are placed on the x axis one mass is at -130 one is at the origin and one is at
the sun has a mass of 199 x 1030 kg and is moving in a circularorbit about the center of our galaxy the milky way
a 90 kg cylinder rolls withoutslipping on a rough surface at an instant when its center ofgravity has a speed of 80
exactly 2000 ml of standard 01171 m caoh2 are titrated with a solution of citric acid h3c6h5o7 if 1743 ml of the citric
a 40kg block is suspended from a spring with force constant of500nm a 50g bullet is fired into the block from directly
in a hypothetical nuclear fusion reactor the fuel is deuterium gas at a temperature of about 91 x 108 k if this gas
calculate the change in entropy when 165 mol of a perfect gas with cvm 12 j k-1 mol-1 is compressed from 064 dm3 to 023
a cylindrical fishing reel has a moment of inertia of i 630e-4 kgm2 and a radius of 386 cm a friction clutchin the reel
a styrofoam cup holding 90 g of hot water at 95degc cools to room temperature 230degc what is the change in entropy of