Two isotopes are known for Nitrogen. 99.63% of all the atoms of Nitrogen weight 14.003074 amu. The other 0.37% weights 15.000108 amu. Find the average atomic mass of Nitrogen.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

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

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)