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the coating on the head of a match is highly flammable when it burns it releases a great deal of energy however before
assume you take a sample of 114 g al and oxidize i in an excess stream of o2 to produce 210g of al2o3 calculate the
which law is supported by each of the following statements the laws are conservation of mass definite proportion and
can someone have a go at doing this so i can compare my method my answer is off by 2ml and i cant work out whyhow much
the half-life of phosphorus-32 is 143 days if you begin with 411 mg of this isotope what mass remains after 422 days
a certain reaction has an enthalpy of deltah 44 kj and an activation energy of ea 56 kj what is the activation energy
thermal fluid systemsa furnace burning c2h6nbspis used to provide heat to a boilernbsp the boiler produces 21 kgs of
a sample of h2 is collected by displaying 145ml of water the pressure of gas and the atmosphere are equalized the
a 127 g sample of an aqueous solution of perchloric acid contains an unknown amount of the acidif 250 ml of 0431 m
what volume of a 0175 m barium hydroxide solution is required to neutralize 229 ml of a 0388 m perchloric acid
for multi-electron atoms which is any atom except for hydrogen how are the various orbitals filled what is the electron
1 how do you explain dna testing in a way someone your grandmother will understand2 after your explanation your
describe the reaction of a weak acid and a strong base what will the final ph be when the reaction between equal moles
dna and rnacompare and contrast dna and rna discuss why humans did not evolve with one central repository of dna but
research for an actual case in which dna testing played a crucial role-either a cold case or a current one detail the
consider the following scenario the general secretary of the fda has tasked you with developing an educational flier on
potassium hydrogen phthalate is a solid monoprotic acid frequently used in the laboratory to standardize strong base
anbsp115nbspg sample of an aqueous solution ofnbsphydroiodic acidnbspcontains an unknown amount of the
sulfur dioxide so2 can be reduced by hydrogen disulfide h2s producing sulfur in its elemental form and water h2o using
the combustion of liquid heptane c7h16 in oxygen spontaneously occurs the products of the reaction are carbon dioxide
what volume of a 0144 m potassium hydroxide solution is required to neutralize 232 ml of a 0214 m nitric acid
when the weather is clear air temperature in a dry region can have a significant change in temperature between night
draw a graph to show how surface area of reactants x-axis affects reaction rate y-axis label the graph correctly then
1 draw the structural formula of 3-hexene c6h12 what class of organic molecule is 3-hexenedescribe an isomer draw an
consider the following reaction of aluminum hydroxide and hydrogen chloride to form aluminum chloride and water if 73 g