In a series of experiments on the decomposition of dinitrogen pentoxide, n2o5, rate constants were deter- mined at two different temperatures. at 35°c, the rate con- stant was 1.4 × 10−4/s; at 45°c, the rate constant was 5.0 × 10−4/s. what is the activation energy for this reaction? what is the value of the rate constant at 65°c?

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride