18. which of the following would lower the pitch of a string instrument's sound?

a. increasing the thickness of the string used.

b. using less force to vibrate the string.

c. adding tension within the string.

d. shortening the effective string length.

provide an explanation. don't answer unless you're 100% sure.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

What is the chemical formula for the compound formed between sodium and flour one