Which reaction is not characteristic of an acid a)it dissolves magnesium oxide b) it produces ammonia from ammonium compounds c)it produces carbon dioxide from a carbonate d) it produces hydrogen from zinc metal

Can someone me with 1 to 4 plz. fast

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

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?