Exxon gas station is pictured in ArlingtonHONG KONG (Reuters) – Exxon Mobil Corp has launched an public sale to promote up to $2 billion price of shares in a Hong Kong power challenge after a 12 months-long effort to offload its conserving to its companion yielded no consequence, sources conversant in the matter mentioned. The arena's biggest oil company by market worth has employed Barclays Percentas an advisor for the sale of just about 1/2 of its 60 % stake in Fort Height Energy Co Ltd as part of its plan to divest non-core property. …