the scientist repeats the experiment, burning a new sample of steel wool until it is entirely converted into iron oxide. the iron oxide produced has a mass of 715g. what was the mass of the sample before burning

Select the atomic models that belong to the same element

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)