Ascientist has been collecting data on the soil composition in a forest after a wildfire. every year she visits the forest and takes a sample from the same area. she then analyzes the sample and determines its content. she plans on collecting data for ten years and then determining the trends that have occurred. which type of investigation is the scientist performing? collective comparative experimental descriptive

The answer to this question would most likely be A. As she is collecting the forest soil and bringing it back to study and determine it.

C2H2, or acetylene, has a molar mass of 26g. That means it has 113/26 = around 4.34 mols. Assuming complete combustion, the balanced equation comes out to this:

C2H2 + 3O2 --> 2H2O + 2CO2

Using the molar ratios, we get that we get 8.68 mols of water for every 4.34 mols, so since the molar mass of water is 18 grams per mol, we multiply 18 * 8.68 = about 156.24 grams.