How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum