Which is an example of a chemical change?
a. water evaporating from a puddle
b. cloth tearing when pulled
c. wood forming sawdust when cut
d. bread baking in an oven

Why are pipes bursting in the in extremely cold weather?

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?

Can someone me out on this question for my national 5 chemistry homework