Which types of orbitals are found in the principal energy level n = 4?

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Calculate the number of moles of ethane in 100 grams