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The conversion of substance A to substance B has delta E = ?35 kJ mol?1 and an activation energy, Ea, of 25 kJ mol?1. Sketch a reaction diagram, and on it clearly indicate A, B, the activated complex (C), delta E and Ea.
How much heat energy, in kilojoules, is required to convert 47.0 g of ice at -18.0 degrees C to water at 25.0 degrees C ?
The excess EDTA was then back-titrated, requiring 5.00 mL of 0.050 0 M Zn2. What was the concentration of Ni2 in the original solution?
The two products formed are 2-methyl-1-hexene (19%) and 2-methyl-2-hexene (81%). Show the chemical equation for this reaction. Explain fully why 2-methyl-2-hexene is the major product.
How will density, melting,and boiling point temprature hardness elastisity,expansion,conductivity been infulance atomic constution.Explain.
The heat of vaporization of liquid nitrogen is determined by measuring the change in temperature of a known sample of warm water when liquid nitrogen is added.
Titanium (IV) oxide, TiO2, is heated in hydrgoen gas to give water and a new titanium oxide, TiO. If 1.598 g of TiO2 produces 1.438 g of TiO, what is the formula of the new oxide
A 9.4-g sample of powdered titanium was added to a graduated cylinder originally containing 6.8 mL of water. After addition of the titanium, the water level in the graduated cylinder was 8.9 mL. What is the density of titanium
A 2.00 g sample of ammonia is mixed with 4.00 g of oxygen. Which is the limiting reactant and how much excess reactant remains after the reaction has stopped
Why is it important to be careful when working with barium chloride dihydrate in a lab measuring percent water in a hydrate
When 7.76 grams of magnesium bicarbonate are mixed with 300. mL of 0.10 M hydrocyanic acid, how many liters of gas are evolved at STP
Teaspoon of salt weighs about 5g and contains 2,300mg of sodium. Determine the amount of sodium that has been actually been added, in grams.
Which of these is square planar and which is tetrahedral? State reasons for your choice. b) Rationalize the colors of these complexes in view of your choice.
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