How can the same species of fossil be found on different continents

Why are electrons important?

Which is the correct Lewis structure for acetylene (C2H2) ?

Which of the following is true of physical properties?

If three electrons are available to fill five empty 3d atomic orbitals, how will the electrons be distributed in the five orbitals?

What the molar mass of carbon2hydrogen6

How many moles of aluminum do 5.6*1024 aluminum atoms represent? express your answer using two significant figures?

What is the most accurate description of compounds?

A researcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increases.

If you have three moles of S2, how many moles of Al2S3 can be produced?

Predict whether each of the following reactions will occur in aqueous solutions. Explain your reasoning in each case. Note: Barium sulfate and silver bromide precipitate in aqueous solutions.