Hel What is the molar mass of Na2CO3? (3 points)
60.0 g/mol
106.0 g/mol
118.0 g/mol
141.0 g/mol

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123