1.Given t1/2=3 hrt_{1/2} = 3\,\text{hr}t1/2=3hr for a first-order reaction. How many grams of a substance will remain after 18 hr18\,\text{hr}18hr from an initial 300 g300\,\text{g}300g?a.4.6 g4.6\,\text{g}4.6gb.5.6 g5.6\,\text{g}5.6gc.9.2 g9.2\,\text{g}9.2gd.6.4 g6.4\,\text{g}6.4gLogin to continueOnly logged in users canattempt or see the solution.