Which of the following molecular formulas are also empirical formulas? * 1. ribose (C₅H₁₀O₅)
2. ehtyl butyrate (C₆H₁₂O₂)
3. chlorophyll (C₅₅H₇₂MgN₄O₅)
4. DEET (C₁₂H₁₇ON)Which of the following molecular formulas are also empirical formulas?

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?