If 2.00 mol of gas occupies 4.50L at STP. How much of the same gas will occupy 3.00L at STP?



Metal fluoride thermal stability trends are largely dictated by lattice enthalpies; what matters is the relative size of the cation in consideration (the charge/radius ratio - a measure of polarizability - is also a key factor). Smaller cations can better hold small anions like fluoride. The larger the lattice enthalpy factor, the tougher thermal decomposition becomes. As atomic size decreases across a period, the order of stability is AlF3 > MgF2> NaF.

picture them in your mind

1.33 moles


4.50/2.00 = 3.00/n²

use formula

v1/n1 v2/n2

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