What is the molecular formula of a compound that has a molecular weight of 240.0 grams?. A 5.00-gram sample contains 2.00 grams of carbon, 0.34 grams of hydrogen, and 2.69 grams of oxygen.

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

There are main groups in the modern periodic table of elements