Why doesn't the evaporation flask have bubbles below the surface

Oxygen has an atomic number of 8. What is the approximate atomic mass of an oxygen atom in daltons (Da) ?

What does a roman numeral tell you when it is written after an element

What are the non-living components of an ecosystem? The non-living components of an ecosystem are factors.

Boiling is a bulk phenomenon. True or false

A scientist studies the DNA of three different species. The DNA from species A is more similar to DNA from species B than DNA from species C. Which species are probably the most closely related? Explain your answer.

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)