What is the percent by mass of oxygen in fe2o3

What is the name of this hydrocarbon?

How will the emission of an alpha particle affect the atomic number of an atom

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question