Exxon Mobil Corp ( XOM.N ) said on Monday lower natural gas and chemical margins in its second quarter would offset improved crude and refining operations, pointing to flat profits sequentially and down from a year earlier. The U.S. oil major said in a filing bit.ly/2RL5hMp it expected a change in crude prices to boost second-quarter profit by $400 million to $600 million. However, gas prices which have dropped to multi-year lows in the face of tepid demand were expected to offset it by an equal measure. RBC Capital Markets analysts in a note said the magnitude of weakness across refining, chemicals, and gas and the lack of sequential improvement, “leaves us heading into another disappointing quarter for […]