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what is the concentration of an naoh solution for which 1125 ml is needed to titrate 153 g of benzoic
the combustion of ethane c2h6 is carried out according to the following unbalanced equationc2h6o2---co2 h2oif 1930g of
what is the percent by mass concentration of a solution that was prepared by dissolving 30g of salt in 197 g of water
a buffer is prepared by adding 5 g of ammonia nh3 and 200g of ammonium chloride nh4cl to enough water to form 250 l of
ephedrine a central nervous stimulant is used in nasal sprays as decongestant this compound is a weak organic
the gaseous reaction n23h22nh3 is at equilibrium when the volume is suddenly halved ie the total pressure is doubled
katherine wants to investigate if the time of day a plant is watered affects the growth of the plant she hypothesizes
what is the energy and frequency of the photon to raise the electron in a hydrpgen atom from the energy level n2 to
consider the following exothermic reaction at equilibrium cog h2og h2g co2g what happens to the system when carbon
the laser in a laser pointer uses light with a wavelength of 055 mm calculate the frequency of light be sure to show
tin reacts with hydrochloric acid to yield sncl2nbspand h2g how many liters of hydrogen gas are produced at 270degc and
assuming the ocean continues to acidify at the same rate that it has been over the past 200 years where the oceans ph
a calculate the mass of water produced when 752 g of butane reacts with excess oxygen express your answer to three
a dandruff shampoo contains dipyrithione c10h8n2o2s2 an antibacterial and antifungal agenta what is the empirical
a fuel-air mixture is placed in a cylinder fitted with a piston the original volume is 0245-l when the mixture is
chloroform chcl3 was formerly used as an anesthetic but its use was discontinued due to respiratory and cardiac
benadryl is an over-the-counter drug used to treat allergy symptoms the formula of benadryl is c17h21no a how many
a calculate the number of moles of aluminum sulfur and oxygen atoms in 300 moles of aluminum sulfate al2so43express the
a calculate the number of molecules in 400 moles h2sexpress your answer numerically in moleculesb calculate the number
when aqueous solitions of agno3 and nacl are mixed agcl precipitates balance equation issoaps are able to dessilve
the reaction of hydrogen with oxygen produces water2h2go2grarr2h2oga how many moles of o2 are required to react with 29
pentane c5h12 burns in oxygen to produce carbon dioxide and water via the following
consider a situation in which 211 g of p4 are exposed to 240 g of o2a what is the maximum number of moles of p2o5 that
p4s10cl2grarr4pcl5ga-how many moles of pcl5 can be produced from 260 g of p4 and excess cl2 express your answer to
1 titanium dioxide whats the percent of oxygen by mass in titanium dioxide 2 by mass nicotine is 740 carbon 87 hydrogen