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Consider the following reaction:
2H2(g)+O2(g)= 2H2O(l) delta H=-572kJ
how much heat is evolved for the production of 1.00 mole of H2O(l)?
use the concept mof electron configuration to explain why the number of valence electrons in metals tend to be less the number in most nonmetals.
Find the pH solution & Hydronium ion concentration and What is the pH of a solution of 0.17 M acid and 0.81 M of its conjugate base if the pKa = 8.62?
Problem- An aqueous solution containing 6.59 g of an optically pure compound was diluted to 300.0 mL with water and placed in a polarimeter tube 10.0 cm long. The measured rotation was -4.87° at 25 °C. Calculate the specific rotation of the compoun..
You find a log that could be spruce or birch. In order to figure out which is, you put the log in a big bucket and find that it displaces 2.7 gallons of water and it weighs 19.8 lbs. Is it spruce or birch? (Density of spruce 0.9 g/cm^3, birch 0.4 ..
What are the standard conditions of temperature and pressure, and why is it important to have a set of standard conditions
What is the pH of a buffer solution prepared from 5.15g of NH4NO3 and 0.10L of 0.15M NH3? What is the new pH if the solution is diluted with pure water to a volume of 500mL
Under conditions for which chlorine gas has an effusion rate of 2.4x10^-6 mol sec^-1, what would be the effusion rate for bromine gas, in mol/sec
Calculate the pH in the solution formed by adding 10.0 mL of 0.100 M HCl to 20.0 mL of 0.100 M NH3
A dioxin-contaminated water source contains 0.081% dioxin by mass. How much dioxin is present in 4.2 L of this water? (Assume that the density of the solution is 1.01 g/mL.)
a what temperature change would you expect in which 50.0 ml of 2.0m hcl is combined with 80.0 ml of 2.0 m naoh in
write a net ionic equation for the reaction between aqueous solutions of perchloric acid and rubidium
Solid Ba(MNO4)2 is in equilibrium in a solution of KMNO4. What concentration of KMNO4 is needed to establish a concentration of 2.0 x 10-8 for the Ba 2+ ion in solution?
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