Help ASAP I’ll mark you as brainlister:((?!!

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

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?

Which of two curves exhibits exponential growth