The first answer gets !what are the three most abundant elements found in earth's crust that combine to form minerals? a. iron, aluminum, magnesium b. oxegyn, silicon, aluminum c. oxegyn, silicon, iron d. silicon, iron, aluminum

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)