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A piece of sodium metal reacts completely with water as follows.
2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
Draw the experimental outcome for a titration analysis involving a titrant and titrand (the pH vs. volume titrant added response curve), wherein the titrand is the weak, monoprotic base aniline (0.05000 F, 0.10000 L), and the titrant is a strong m..
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
determine how do you know if there must be a precipitate or not and Show whether or not a precipitate will form if The Ksp of PbI2 =9.8×10-9
Determine the pH and the percentage of fully protonated weak acid/base for each of the solutions listed below:
the rate constant for the second order -reaction is NOBr(g)------>NO(g)+1/2Br2(g) is 48 L/mol*min at a certian temperture. How long will it take for 90.0% of a .0200M solution of NOBr to decompose
given that the molar enthalpy of vaporization delta h for H2O(l) is 44kj at 298k, what is the standerd enthalpy change for the reaction 2H20(G)+ O2(g)---->2H2O(G)?
Hydrogen bonds a) play an important role in the solvent properties of water b) are not involved in protein structure c) play a role in the properties of DNA, but not of RNA d) give water a lower boiling point than expected 44
A 120g sample of an unknown substance was heated from 15oC to 30oC. The substance absorbed 458 joules of energy. What is the specific heat of this substance?
Calculate the empirical formula for a chemical compound which gives the following analysis: 12.6 percent lithium, 29.2 percent sulfur, and 58.2 percent oxygen.
How much salicylic acid is required to produce 1.1 x 102 kg of aspirin assuming that all of the salicylic acid is converted to aspirin
If 1.50g (NH4)2SO4 is dissolved in enough water to form 250 ml of solution, what is the molarity of the solution.
if molarity of a 2000ml solution is 4.0M NaCl, how many moles of NaCl are dissolved in that solution.
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