What Li(s) + O2(g) -> Li2O(s) balanced is

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

Iknow #2 is d. i just need to know why

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4