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What are the ways of choosing the best water dispenser? A sample of 99Tc decays to 0.5 grams in 1490000 years. What was the mass of the original sample? What is the name of this coordination compound?
[Co(NH3)5Cl](NO3)2? Calc 2 please? If input impedance of an amp is 20 kOhm, what is the recommended impedance of the input line?