The most common component of sand is silicon dioxide in the form of quartz. Simple version just broken down rocks and minerals.
Answer should be 1.5 M given that M is the SI unit for molarity!
Intertidal zone is the shallowest part of the ocean ecosystem, where the ocean floor os covered and uncovered as the tide goes in and out
Compound 1 = Carbon 1 atom & Hydrogen 1 atom
Compound 2 = Nitrogen 1 atom & Hydrogen 1 atom
Compound 3 = Magnesium 1 atom
Compound 4 = Sodium 1 atom
This should be the answers because the compounds after the example don’t have any numbers