A 118.0 g sample of a compound contains 72.0 g of C. 18.0 g of H, and 28.0 g of N. Which of the following is the empirical formula of the compound?​

The conventional equilibrium constant expression (kc) for the system below is: 2icl(s) ⇄ i2(s) + cl2(g) [cl2] ([i2] + [cl2])/2[icl] [i2][cl2]/[icl]2 none of the listed answers are correct [i2][cl2]/2[icl]

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?