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Iodine-131 is a radioactive isotope. After 5.00 days, 65.0% of a sample of 131I remains. What is the half-life of 131I? please show all details on how you got the answer im really trying to understand this
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? Change in H degrees for the reaction is +624.6 kJ. SiO2 (g) + 3C (s) -> SiC (s) + 2CO (g)
The solubility of an ionic compound M2X3 (molar mass = 200. g) is 2.3 multiplied by 10-17 g/L. What is Ksp for the compound?
18.25 ml of 0.197 M NaOH will neutralize 10.00 ml of what molar concentration of H2SO4 solution?
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
Find the pH at the equivalence point(s) and the volume (mL) of 0.125M HCL needed to reach the point(s) in titrations
Assuming electrons with quantum numbers (n,l,mt,ms), how does an electron with the quantum numbers (2,1,1+1/2) differ from an electron with quantum numbers (2,1,-1,+1/2)?
Four Cl- ions can act as ligands to form a complex ion with Cu2+. What is the overall charge of the complex ion?
calculate the milliliters of 0.124 M KOH required to neutralize 46.0 mL of 0.200 M HNO2-?
approximately how many grams of NH4Cl will dissolve in 100g of H2O at 70 C?
what is the lewis structure and molecular geometry of pernitrate and carbonate ion?
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?
A chemical reaction takes place in a container of cross-sectional area 100 cm2 As a result of . the reaction, a piston is pushed out through 11 cm against an external pressure of 689 torr. What is the value for w for this reaction?
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