Compare the pressures given by (a) the van der waal’s equation, (b) the redlich-kwong equation, and (c) the peng-robinson equation for propane at 400 k and rho = 10.62 mol l-1. the experimental value is 395 atm. take α = 9.6938 × 105 l^2 pa mol^-2 and β = 56.32 cm^3mol^-1 for the peng-robinson equation.

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true. a: atoms are the smallest unit of an element that commonly occur in nature. b: molecules are the smallest unit of an element or compound that commonly occur in nature. c: molecules are the smallest unit of a compound that occur on the periodic table. d: compounds are the smallest unit of an element that occur on the periodic table