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The average atomic mass of naturally occurring lithium is 6.941 amu. its is mixture of two isotopes : lithium 6 (isotopic mass = 6.01512amu) and lithium 7( isotopic mass = 7.01600). what is the percent composition of lithium? (hint, if x = the % of lithium 6, what is the %of lithium 7 )
consider a sample containing 5 mol of a monatomic ideal gas taken from state a to state b. calculate changeE, changeH,q, and w.
Explain briefly that how HCl could test for limestone's presence , use the balanced chemical equation for this and then describe specific reaction that takes place?
What mass of oxygen will react with 2.64g of magnesium? 2Mg(s)+O2(g)-->MgO(s)
How many grams of ammonia can be produced ? How much of the excess reactant is left over?
determined for MgO to be the same as the one determined by another student
Propose a method to synthesize (2R,3R) 2,3-epoxyhexan-1-ol using ethanol,methanol,co and CN- as carbon sources
Write a balanced equation for the reduction of ethyl acetoacetate to S(+) ethyl 3-hydroxybutanoate, show stereochemistry
Consider the reaction, 2 Al(OH)3 + 3 H2SO4 ->Al2(SO4)3 + 6 H2O. How many grams of Al2(SO4)3 are generated when 152 g of H2SO4 reacts?
Data for the decomposition of hydrogen peroxide at some set temperature T is include below. The rate law depends only on the concentration of H2O2.
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with its surrounding (for example, through CO2) so that a constant level of 14C is maintained, corresponding to 15.3 decay events per minute
Give the answer ect number of significant figures. Translate the "E" below into "x 10" to the power of whatever numto the corrber follows it. for example, 6.8 E +01 is 6.8 x 10^1
What weight of Pb(NO2)2 wil have to be dissolved in one liter of water to prepare a 100ppm Pb2+ solution.
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