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Magnesium ions can be precipitated from seawater by the addition of sodium hydroxide.How much sodium hydroxide in grams must be added to a sampleof seawater to completely precipitate the 83.2 mg of magnesiumions present? (Hint: Begin by writing a balanced equation for thereaction between magnesium ions and sodium hydroxide.)
What mass of barium sulfate can be produced when 100.0 ml of a 0.100 M solution of barium chloride is mixed with 100.0 ml of a 0.100 M solution of Iron(III) sulfate
Determine how many grams will remain in 150 Years If we have 150.000 g of 137Ce now,?
At a local convince store, you purchase a cup of coffe, but at 98.4 degree, it is too hot to drink. You add 47.7g ice that is -2.2 dgree to the 248ml of coffe. What is the final temperatuer of the coffee.
n2 react with hydrogen gas to form nh3 if 14.01 g sample of n2 react with 4.07g of h2 determine how many of nh3 is
Alpha helices are a type of secondary structure in proteins. What is the length of a 41-kDa single-stranded ?-helical protein segment. Assume a mean residue mass of 110 Da.
Draw the structures and write the IUPAC names of the two alkenes formed when 2-hexanol undergoes a condenstation reaction in the presence of an acid catalyst
Use the Heisenberg uncertainty principle to calculate the uncertainty (in meters) in the position of a honeybee weighing 0.65g and traveling at a velocity of 0.90m/s
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
Given that B(SiO) 640 kJ/mol, show that bond enthalpy considerations predict that silicon-oxygen compounds are likely to contain networks
Calculate the molarity if 14.5 g of NaOH was dissolved in enough water to give 360 mL of solution.
The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are..
a freshman is currently enjoying the arts studio program she is pursuing at a well-known university. in her free time
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