Which of these is reasonable for most of the damage caused by a tornado a. rain b. hale c. dust d. wind

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block