HELP PLZ!! Which of the following statements is true? A the law of conservation of mass states matter can be created or destroyed in chemical reactions.

B atoms of a specific element can have different atomic masses.

C chemical reactions rearrange the atoms in the reactants to yield the products.

D during chemical reactions the number and types of atoms in the reactants is different than the number and types of atoms in the products.

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)