The following equation describes how sodium and chlorine react to produce sodium chlorine

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.