A compound is found to contain 68.54% carbon, 8.63% hydrogen and 22.83% oxygen. The molecular weightof this compound is appoximately 140 g/mol. What is the empirical formula? And What is the molecular formula

Drug abuse will not lead to physical and psychological dependence. true or false ?

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g