Find the molar mass of 30si if the average molar mass of si is 28.09 g/mol? ? silicon has three naturally occurring isotopes (28si, 29si, and 30si). the molar mass and natural abundance of 28si are 27.98 g/mol and 92.20%, respectively, while the molar mass and natural abundance of 29si are 28.98 g/mol and 4.67%, respectively. i'm really stuck on how to solve this, it's a practice final exam question for

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic