Sodium hydrogencarbonate decomposes on heating: 2 NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g)
If 3.36 g of sodium hydrogencarbonate is heated calculate:
the number of moles of sodium hydrogencarbonate used

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?