Which balanced equation represents a phase equilibrium?
(1) h2(g) + i2(g)< ==> 2hi(g)
(2) 2no2(g) < ==> n2o4(g)
(3) cl2(g) < ==> cl2(l)
(4) 3o2(g)< ==> 2o3(g)

Which substances have the lowest melting points: ionic covalent, or metallic

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

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what