HELP ASAP What did Dmitri Mendeleev contribute to science?
A. He discovered many unknown elements.
O B. He arranged the first periodic table.
O C. He developed the first atomic theory.
D. He developed the first model of the atom.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

What substance has a mass of 9.5g and volume of 2.1cm^3

Compare sympathetic and parasympathetic