Considering the concept of surface area affecting rate of reaction explain why grain storage silos sometimes explode spectacularly

Which statement is best described as a atom

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.