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a 2500 kg truck traveling north at 45 kmh turns east and accelerates to 56 kmha what is the change in the trucks
solid sodium peroxide na202 reacts with liquid water yielding aqueous sodium hydroxide and oxygen gas how much heat is
how many micrograms are present in 23469 g 1g 1x106 micrograms please show your work and use significant figures in the
a carnot heat engine operates between reservoirs at temperatures of 864 k and 297 k in one cycle it absorbs 1405 j heat
what is the density in gcm3 units of a solution that has a net mass of 548 g and occupies a 0050 l volume please show
a 01018 g sample of copper metal is dissolved in 14 ml of concentrated hno3 to form cu2 ions and then water is added to
a proton is fired from far away toward the nucleus of an iron atom iron is element no 26 ie q26 x 16 e -19 c what
calculate the ph of 100 ml of 30 m nh3 before and after the addition of 40 g of nh4no3 and account for the change
a 200 g sample of silver ag was heated with excess sulfur s to produce 230 g of a silver sulfide calculate the
a variable-speed drill initially turning at 400 rpm speeds up to 1300 rpm in a time interval of 10 s what is its
a -600-microc charge is moving with a speed of 640 104 ms parallel to a very long straight wire the wire is 500 cm from
in one type of computer keyboard each key holds a small metal plate that serves as one plate of a parallel-plate
the frequency factor a for a certain reaction at 75oc is 87 x 1012 s-1 and the activation energy 63 kjmol what is the
a cylindrical capacitor consists of a solid inner conducting core with radius 0200cm surrounded by an outer hollow
the first-order rate constant for the decomposition of a certain hormone in water at 25oc is 0125 yr-1 how long will it
1 which of the following reagents are used to separate metal ions in an aqueous solution containing feno33 and agno3
you are diring a car on a freeway and you happen to be behind a big truck at one moment trucks tire spins a small 15
in a coffee cup calorimeter 100ml of 010 m hclo4 is mixed with 100ml of 010 m koh the initial temperature of both
1 what volume in ml is needed for the solution of hcl to react with a sample of al 160 2al 6hcl gt 2al 3h22 calculate
if 10 g of chlorine gas is reacted with a solution containing 25 g of sodium bromide which substance is limiting and
a 20-kg object is at rest at the top of an inclined plane that makes an angle of 30deg with the horizontal and which
a compound with a formula c10h16 takes up one mole of h2 on catalytic hydrogenation give possible structures for it if
consider the following experimental data set obtained for the density of a metal object as measured by three students
an object of mass 5 kg is dropped from a certain height just before it strikes the ground it has a kinetic energy of
how does increasing the concentration of a nonvolatile solute in water affect the following propertiesvapor pressure