Cu(no3)2 + zn (s) → cu (s) + zn(no3)2 is an example of which type of reaction?
combustion
decomposition
single-displacement
double-displacement

In a ball-and-stick molecular model, what do the sticks represent?

The hammering on a train track is often heard twice by workers farther down the track; first as the sound travels through the steel and second as the sound travels through the air. this suggests which graph is true?

If cos x =sin(20 + x) and 0 < x < 90, the value of x is > 3 , 35 , 350answer is 35, free 50 points