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An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of of the same concentration.Which of the following substances could the unknown be: KOH,NH3,HNO3,KClO2,H3PO3,CH3COCH3 (acetone)?
Nuclides above the valley of stability can become more stable through which of the following processes
In a half-life decay process, start with 4.00 mCi of material having a half life of 25 mins. Without any detailed calculations, approximately how many mCi of this isotope would be remaining after 2 hours and 10 mins
predict the formula of a compound that presumably would result from the reaction between magnesium and topaline, and name the compound.
A lungful of air (500 mL) contains 4.1% CO2 by volume. How many grams of KO2(s) is needed to remove the CO2 from a lungful of air at STP according to the following reaction?
2) Calculate the concentration of an aqeuous solution of Ca(OH)2 pH of 12.05.
Calculate Kc for the reaction 2CCl4(g) + O2(g) [3] 1.75 moles of H2O2 were placed in a 2.50 L reaction chamber at 307C. After equilibrium was reached, 1.20.
Acetic acid, CH3COOH, could be produced from (a) the reaction of methanol with carbon monoxide; (b) the oxidation of ethanol; (c) the reaction of carbon monoxide with methane. write balanced chemical equations for each process. carry out a thermod..
A 255-mL flask contains pure helium at a pressure of 745 torr. A second flask with a volume of 455 mL contains pure argon at a pressure of 725 torr.If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial ..
What current is required to produce 91.6 g of chromium metal from chromium(VI) oxide in 12.4 hours?
explain why some substances are soluble in water and some are not. respond to the statement like dissolves like. give
Calculate the masses of the reactants and products of the following equation. Please show work.
Calculate the theoretical yield of C2H5Cl when 138 g of C2H6 reacts with 244 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
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