Agas obeys the following equation of state: 1) p (v- b) rt+ (apt) where p is the pressure, v is the specific volume, t is the temperature, r is the universal gas constant, and a and b are constants for a gas. (a) [17 points] calculate the entropy change involved when the gas changes from 4 atm and 300 k to 12 atm and 400 k. (b) [8 points] estimate the mean specific heat (cp) at 12 atm. data: m mean specific heat (cp) at 1 atm 8 cal/g value of constant a-1 liter k/atm. mol value of constant b-0.08 liter/mol

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

Why is it that 85.48 rounded to two significant figures is 85 and not 86?