Calculate the fraction of atom sites that are vacant for copper (cu) at its melting temperature of 1084°c (1357 k). assume an energy for vacancy formation of 0.90 ev/atom. (b) repeat this calculation at room temperature (298 k). (c) what is ratio of nv /n(1357 k) and nv /n(298 k)?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

What are the coefficients to balance the following equation? ba+br2=babr2

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?