Some mercury (ii) oxide breaks down to form 32g of oxygen and 402g of hg. how many grams of mercury (ii) oxide were used in the reaction? A. 2
B. 307
C. 400
D. 402
E. 434

After cloud droplets form, what must happen to them for precipitation to occur?

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

Which of the following electromagnetic waves can create ions?