the mass of sample X is 20.0 g. It was placed in a graduated cylinder and the water level rose from 14mL to 19mL. what is the density of sample X? Pay close attention to significant figures

What is the number of moles in 15.0 g ash3?

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

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?