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brass is a substitutional alloy consisting of a solution of copper and zinc a particular sample of red brass consisting
the question reads a solution containing 50g of each glycerol and h2o and the water has a density of 110 gmlcalculate
100 ml of 1 m acetic acid pka 476 are placed in a flask what is the ph if 2ml of 1 m koh are added and the total volume
magnesium oxide decomposes into magnesium and oxygen if 403 g of magnesium oxide decomposes to form 243 g of magnesium
write the complete ionic and net ionic equations for the reactions that occur when the following are mixed use the
table salt contains 3999g of sodium per 100 g of salt the us fda recommends that adults consume less than 240 g of
when 205 grams of aluminum metal are dropped in 650 ml of 60 m hydrochloric acid how many liters of gas are evolved at
lead metal can be extracted from a mineral called galena which contains 866 lead mass a particular ore contains 685
you are given 500ml of a solution at ph 70 containing an unknown concentration of atp for which e- the molar
consider an electron for a hydrogen atom in an excited state the maximum wavelength of electromagnetic radiation that
what volume of glacial acetic acid d 106 gml and what weight of solid potassium acetate are required to prepare 5
pure water containing no arsenic was spiked with 40micrograms arsenatel seven replicate determination gave 39 40 39 41
the half-life of u238 is 45x109 years how many disintegrations occur in 1 minute for a 10 mg sample of this
at 20 degree c the vapor pressure of c2h5oh ethyl alcohol is 439 torr the vapor pressure of water at this temperature
an unknown solid compound is analyzed in the lab to determine its chemical formula the following observations are
thermal decomposition of kclo3s yields kcls and o2g when 4289 g of kclo3 003500 mol undergo this reaction how many
what small molecule is eliminated during the dehydration reaction when acetaldehyde is heated in the presence of
the first four ionization energies of an atom x are 590 1145 4912 and 6491 kjmol suggest to which periodic group x
when elements in the d-block are ionized the electrons enter the nd orbitals before they enter the n1s orbitals explain
how many silver atoms are in a single nanoprisms with an edge length of 45nm and a length of 5 nm the density is 105
can someone explain the naming laws to name elements and also how to derive the chemical formula from the names
when 335 ml of 0580 m h2so4 is added to 335 ml of 116 m koh in a coffee-cup calorimeter at 2350degc the temperature
a compund with a formula mass of 4208 amu is found to be 8564 carbon and 1436 hydrogen by mass find its molecular
in ionic compounds with certain metals hydrogen exists as the hydride ion h- determine the electron affinity of