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manganese has a body-centered structure cubic unit cell and has a density of 788 gcm3 from this information determine
if the mass of an object is 15 grams then determine the relative precision and accuracy for the following sets of
use your measured conductances for 0025 m kcl and 0025 m kno3 to predict which of the following solutions has the
an iron ore sample is found to be 3500 fe by mass how many grams of ore are needed to obtain 4540 grams of
an unknown acid has a molar mass of 6005 gmol given the following percent composition what is the molecular formula
what is the molecular formula of a compound given the molar mass of the compound is 1865 g and the empirical formula is
a 1350 l weather balloon filled with 49 moles of helium has a small leak if the helium leaks at a rate of exactly
a compound has a molar mass of 18015 gmol given the following percent composition calculate the molecular
the total solar flux over the earths surface is about 4x1024 j yr-1 using your results from 425 2368x1018j and 426
when the chain-growth polymerization is conducted in dilute and more concentrated solutions the resulting degrees of
1 taking into account the existence of any lone pairs of electrons what is the approximate geometry of electron groups
what volume of a 025 m phosphoric acid solution is required to react completely with 10 l of 035 m sodium
1 if a second-period diatomic molecule has 8 electrons in its valence shell total of 2s and 2p electrons what is the
sodium metal requires a photon with a minimum energy of 441 x 10-19 j to emit electrons a what is the minimum frequency
when measuring the specific heat of a metal why is it best to use the minimum amount of water needed to cove the metal
write balanced equations that described the formation of thefollowing compounds from elements in their standard states
calculate the percent error in your hesss law enthalpy value -686 kjmol the accepted textbook value is
in calculating the molar enthalpy change for reaction 3 why did the instructions specify to base it on moles of mg used
for stronium oxide sro the solubility in water is 069 g per 100ml at 30 degrees c and 228g per 100 ml at 100 c write
draw the organic product of the following reaction between 1s3s-1-chloro-3-methylcyclopentane and methanethiol in the
you are asked to prepare 500 ml of a 0150 m acetate buffer at ph 450 using only pure acetic acid 300 m naoh and water
when a 197 ml sample of a 0323 m aqueous hydrofluoric acid solution is titrated with a 0399 m aqueous potassium
write complete ionic equation to show the reaction of aqueous leadii nitrate with aqueous potassium sulfate to form
a series rl circuit has a resistance of 50 ohms and an inductance of 140 mh and is driven by a 120-v 60-hz