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If 0.043 g of beryllium hydroxide Be(OH)2 is dissolved in sufficient water to make 500. mL of solution, what is the hydronium ion concentration in the solution? (Assume that all of the beryllium hydroxide dissolves.)
when 2.00 x 10 3 g of CaCo3 are heated the actual yield of Cao is 1.05 x 10 3 g. what is the percent yield?
If a column is exchanged for a similar column that is half the length of the first column, how would that change the retention time of a solute
Given Data; P4+6Cl2=4PCl3 change temp= -2439 kj ,4PCl5=P4+10Cl2 change temp= 3438 kj calculate change in temp for the reaction PCl5=PCl3+Cl2.
Nitrogen and oxygen gases react to form dinitrogen trioxide gas. 2 N2(g) + 3 O2(g) -> 2 N2O3(g) At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2.
at 90C the foll equilibrium is established, H2(g) + S(s)=H2S(g) K=6.8*10-2 If 0.2 mol of hydrogen and 1 mol of sulphur are heated to 90C in a 1L vessel.
Using KEGG to trace metabolic pathways. KEGG is a database of genes and genomes organized by metabolic pathways. It is vital to know how to read these metabolic maps and how to use them to pull together entire pathways.
If you want to prepare a 0.5 M solution of ascorbic acid using 25.0 mL water, how many moles of ascorbic acid do you need. How many grams of ascorbic acid is this
When solution of silver nitrate, AgNO3, and calcium Iodide, Cal2, are mixed, a yellow precipitation of silver iodide is formed. Calculate the mass of silver iodide that is formed in 50 mLof 1.00 M AgNO3 is combined with 30 mL of 1.25 mL CaI2.
if 47.2 g of n2o4 is introduced into an empty 1.84 l container what are the partial pressures of no2 and n2o4 after
Calculate the total heat in joules needed to convert 25.00 g of ice at -3.50 degrees c to liquid water at 0.250 degrees c.
a 0.21 m3 drum contains 100 l of a mixture of several degreasing solvents in water. the concentration of
State balanced chemical equations for the reactions of the subsequent three metals with sulfuric acid, H2SO4. Underneath each reaction, State in order, (i) the group number of the metal element in the periodic table
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