What do these volcanoes indicate about plate tectonics in the region?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17