Write down chemical reaction equations of the of 2,4- dinitrophenylhydrazine (DNP) and second simplest aldehyde.

What is impossible to do with a hypothesis

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?

What is the molecular weight of copper