What describes an impermeable rock where oil and natural gas deposits are found ?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

What is the molar mass of a gas that has density of 2.054 g/l

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d