DAILY DAY 1 1. What is photosynthesis?

If you are new read my bio an my previous question so you can see what iam doing.​

Draw two cyclic constitutional isomers of cis-1

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?

Explain how to convert from one unit to another in the metric system.