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Monica deposits $3,000 every 6 months for 25 years. How much will she have in her account at the time of the last deposit if the account pays 8%/a compounded semiannually?
prepared by dissolving 33.2 g of the compound in sufficient water to form 250 mL of solution. The solution has an osmotic pressure of 1.2 atm at 25 °C. What is the molar mass (g/mole) of the compound?
An aqueous solution containing 2.0M of AgNO3 is slowly added from a burette to an aqueous solution that holds 0.01M Cl- as well as .01M Br-. Is separation of the two ions by selective precipitation feasible? Assume 10^-5 M as the complete removal ..
Problem- Two students performing the general unknown lab were told that their unknown would contain 4 cations. They first tested for the silver and aluminum, but found that another ion was present.
A portion of this solution was found to have an absorbance of 0.15 under the same conditions that were used to generate the given absorbance vs. [Cu2+] graph. What was the concentration of Cu2+ ions in the original sample
A mass of 2.052 g of a metal carbonate, MCO3, is heated to give the metal oxide and 0.4576 g CO2.
A sample of a radioactive substance used in detecting skin cancer produced 592 counts in one minute at the beginning of a test and a count of 451 counts in one minute after one day. If the background counts-per-minute was 48, what is the half-life..
The Ksp of AgI is 8.3 x 10-17, what is the molar solubility of AgI in a 0.10 M AgNO3 solution. What principle does this illustrate
a 0.456 gram sample of an unknown mono- protic acid lets call it hz was dissolved in some water you pick the amount.
Suppose one mole of superheated water is evaporated at 383 K and 101 kPa. Compute DS of the water and of the surroundings, DHv(373 K) = 47.3 kJ mol-1, Cp(H2O,l) = 75.4 J K-1 mol-1, and Cp(H2O,g) = 30.36 + 9.61x10-3T + 11.8x10-7T2 (J K-1 mol-1). Ex..
Imagine a single DNA strand containing a section with the following base sequence: 5'-GCATTGGC-3'. What is the base sequence of the complementary strand
Explain how many half-lives must elapse before the activity of a radioactive isotope reduce to 1% of its initial value? Explain how long is this time for 87Rb, which has a decay constant of 0.1420 x10-10/yr?
Define why water spontaneously freezes to form ice below 0 even though the entropy of the water decreases during the state transition. Explain why is the freezing of water not spontaneous above 0
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