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Explain what is the molarity of a solution containing 72.9 grams of HCl in sufficient water to make 500mL of solution?
If it takes 3.50 minutes for the concentration of the reactant in a first order reaction to drop in concentration from 1.20M to 0.400M, how long will it take for the concentration to drop from 0.400M to 0.200
For the reaction 2HCl+Na2CO3 →2NaCl+H2O+CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP?
2.3 grams of sodium reacts violently with excess water and 0.080 grams of hydrogen are collected. What are the theoretical and percent yields of hydrogen gas
How many moles contain each of the following? 3.75 x 10^24 molecules CO2
A backpacker wants to carry enough propane to heat 2.00 L of water from 25.0 degrees Celsius to its boiling point. If each gram can generate 29.5 kJ of heat, what volume of propane (in mL) should the backpacker take with her camping
given fech3coo3nbspcan dissolve in water and form the following species fe3 feoh2 feoh2 ch3cooh ch3coo-. nbspwrite
Bromine can form compounds or ions with any number of fluorine atoms from one to five. Write the formulas of all five of these species
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
A sugar water mixture contains 45.8g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
A compound composed of only carbon and hydrogen is 7.743% hydrogen by mass. Propose a Lewis structure for the compound.
2 O3 (g) ? 3 O2 (g) (rate expression)
a mixture of Phe (pI 5.5), Thr (pI 6.5), Asp (pI 3.0), His (pI 7.6), and Lys (pI 9.8) at pH 9.8 is loaded on an anion-exchange column and then eluted with a pH gradient of lowering pH. what order will the aminoo acids elute? Explain.
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