Yahweh being pleased with the sincere worshiper offering the sacrifice is spoken of as if Yahweh were pleased by the aroma of the burning sacrifice. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Yahweh is telling Moses that the offerings are to be burnt with fire. This can be stated in active form. Alternate translation: "a burnt offering to me" (See: [[rc://en/ta/man/translate/figs-activepassive]])