Calculate the molar mass of Al2O3.
A) 70 g/mol B) 43 g/mol C) 102 g/mol
D) 210 g/mol

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

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?