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Question- A sample of I-131 has activity of 30 mCi. Its half-life is 8.08 days. Calculate activity at end of 20 days.
Explain the each and every step in detail for help
An unknown compound contains only carbon, hydrogen, and oxygen (C_x,H_y,O_z). Combustion of 4.50 g of this compound produced 6.60 of carbon dioxide and 2.70 of water. How many moles of carbon,C , were in the original sample
The subsequent reaction is carried out in a 2.5 L reaction vessel. 2HgO 2Hg + O2 At the beginning of the reaction, 14.7 mol of HgO are present. After 12 min, 11.1 mol of HgO remain. Explain what is the rate of the reaction in M/min
the average distance between mars and earth is about 1.3 108 miles. how long would it take tv pictures transmitted from
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determine the density in gml of a 0.70 g sample of oxygen gas that occupies 5.0l. compare the density of oxygen gas to
Determine the percent by mass of calcium carbonate in the sample
Explain what is the relationship between the moles of base and the moles of a monoprotic acid in a neutralization reaction
Draw the structure(s) of the primary alcohols with the chemical formula C6H14O that have a chiral center
A buffer solution is prepared by adding 0.125 mol of ammonium chloride to 500mL of 0.500 M aqueous ammonia. Explain what is the pH of the buffer. If 0.0100 mol of HCl gas is bubbled into 500mL of the buffer, Explain what is the new pH of the solut..
A chemist was studying the solubility of two "new" compounds she made in her laboratory at work; NI3 and CBr4. They will not dissolve in each other Explain why they may not be dissolving in each other, based on molecular comparison, and draw the 3..
What is the minimum temperature required to convert all but 0.040 of to products by 4:00 p.m.?
An atmospheric chemist fills a gas-reaction container with gaseous dinitrogen pentaoxide to a pressure of 110. kPa and the gas decomposes to nitrogen dioxide and oxygen. Explain what is the partial pressure of nitrogen dioxide, PNO2, (in kPa) when..
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