What is the % by mass of P in the compound P4S3?
A. 43.2
B. 12.9
C. 17.7
D. 56.4

Can someone me with questions 12 and 13 plz.

What is the lowest number energy level where a d sublevel is found

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium