How many grams are in 1.29x10^24 molecules of Sr(OH)2

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

An observation that requires measurement is called quantitative observable or qualitative

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?