An element, X, contains 14 protons, 15 neutrons, and 14 electrons. Which element is this? a. Element A: 13 protons, 15 neutrons, 14 electrons
b. Element B: 14 protons, 14 neutrons, 14 electrons
c. Element C: 15 protons, 14 neutrons, 15 electrons

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?