The European Space Agency launched a probe called Rosetta in March 2004. In August​ 2014, Rosetta reached its​ destination: a comet called​ 67P/Churyumov-Gerasimenko. Rosetta is the first spacecraft to rendezvous with a​ comet, and plans to orbit the comet. It contained a lander​ craft, called Philae. The Philae lander has several scientific instruments​ onboard, used to study the comet. ALICE is an ultraviolet imaging​ spectrograph, used to search for noble gases in the comet core. The ALICE instrument uses potassium bromide as one of the compounds in the analysis of noble gases. Potassium bromide has a specific gravity of 2.74. Assume the lander has a liquid sample of potassium bromide onboard that fills a 1.49​-gallon ​[gal] container. What is the mass of the potassium bromide sample in the​ container, in units of kilograms​ [kg]?

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