Your hands get warm by a fire because is converted into heat energy.
a) chemical
b) electrical
c) mechanical
d) nuclear

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Can someone me with questions 12 and 13 plz.