A balloon contains 12.1 L of helium gas at STP. What is the mass in grams of He in the balloon?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

How many grams of aluminum will there be in 98g of al2o3?

Which fact represents evidence for the big bang theory?