How many grams of K20 will be produced when 0.1223 moles of KNO3 is heated? Balanced equation:
4 KNO3 ---> 2 K20 + 2 N2 + 5O2

What material does not melt at any temperature

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

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?