How many milligrams of polonium-210 remain
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
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Prepare a two- to three-page paper in APA style, sixth edition format that describes, explains, addresses, and answers the following questions or statements. Which economic system is best suited for handling a crisis of epic proportions?
Draw the structure for 2-bromo-3-methyl-3-heptanol. Draw the molecule by placing atoms on the grid and connecting them with bonds.
A compound has a molar mass of 100 g/mol and the percent composition of 65.45% C, 5.5% O. Determine the empirical formula and the molecular formula.
The rate constant for the elementary reaction is 7.1x10^9/M·s at 25°C. 2 NO(g) + O2(g) 2 NO2(g) What is the rate constant for the reverse reaction at the same temperature?
A condenser is to be supplied with 0.0095 m3/s of cooling water at 25oC. What diameter of schedule 40 pipe should be recommended for this application using the economic pipe diameter?
Calculate the value of Kc for the following reaction at 700 C. Analysis at equilibrium showed that there are 2.50 moles of H2, 1.35 x 10-5 mole of S2 and 8.70 moles of H2S in a 12.0 L flask used for the measurements.
In the reaction A → products, [A] is found to be 0.490 M at t=72.0 s and 0.474 M at t=82.6 s. What is the average rate of the reaction during this time interval (in Ms^-1)?
At 760K, 85% of a sample of cyclopropane changes to propane in 79.0min. Calculate the value of the rate constant for this reaction. All isomerization reactions are first-order.
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