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The rate at which an Australian tree cricket chirps is 184 per minute at 35 degrees C, but only 50 chirps per minute at 10 degrees C. Assuming that cricket chirping follows the Arrhenius Law, what is the activation energy for the cricket chirping (in kJ/mol)? Enter your answer using 3 significant figures.
Using the periodic table only, determine which members of the set have the shortest and longest bond lengths. N-H N-S N-O
consider a molecule with spacing between two energy levels of 0.250 kj mol-1. calculate the wavelength and wavenumber
A 195mg sample of a non-electrolyte isolated from throat lozenges was dissolved in enough water to make 10.0mL of solution at 25 degrees Celsius. The osmotic pressure of the resulting solution was 4.83atm. Calculate the molar mass of the compound.
For each of the following pairs of substance, predict which member of the pair will have the higher melting point, and explain why. a) NaCl and Cl2 b) SiO2 and CO2 c) Cu and CO d) NaF and MgO e) Na2) and SiC f) HCl and HF g) Ar and NO
Calculate the enthalpy of the reaction: 2NO(g) + O2(g) --> 2NO2(g) given the following reactions and enthalpies of formation: 1/2 N2(g) + O2(g) --> NO2(g), delta H *A = 33.2 kJ 1/2 N2(g) + 1/2O2(g) --> NO(g), delta H *B= 90.2 kJ
Consider the conductance of the following 0.025 M Solutions.How do I use data to classify each solute as either a nonelectrolyte (NE), a weak electrolyte (WE), or a strong electrolyte (SE)
An unknown compound degrades when exposed to sun light by first order kinetics. The half-life for this process is exactly 5.12 weeks. What is the rate constant
What was the calculated PH value obtained for the reaction NH3 + HCl -› NH4Cl using the thermodynamic data NaOH (aq) + HCl (aq)--> H2O(l) +NaCl (aq) NaOH (aq) + NH4Cl(aq)---> NH3 + NaCl + H2O(l) NH4Cl 2M 20ml NH4OH 2M 10ml HCL 2M 20ml NaOH 2M 20ml
With this reaction 4FeS2+11O---> 2FeO3 +8SO2 A) how many molecules of SO2 are contained in 0.526 of this component? B) if 1.42 g of FeS2 reacts , how many SO2 grams are formed
The concentration of acetic acid (pKa = 4.75) in vinegar is about 1.0 M. With this information, what do you predict the pH of vinegar to be
Find the mass of a reactant using Dalton's law of partial pressures, ideal gas law, and stoichiometry - Determine the amount of zinc metal in grams consumed in the reaction.(Vapor pressure of water at 25 o C-23.8mmHg)
(i) Is the system in equilibrium? If not, which direction must the reaction proceed for equilibrium to be established? (ii) What is the Kp for this system at equilibrium?
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