Please help me! one electron is in a 2s orbital while another is is in a 3s orbital what shape is each electrons orbital

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

What type of chemical bond is formed between two atoms of bromine 1. metallic 2. hydrogen 3. ionic 4. covalent