g The guanadinium ion C(NH2)3 is used medically to treat the symptoms of muscle weakness by enhancing the release of acetyl choline. Draw the structure of the guanidinium ion and that of a resonance form including any necessary formal charges.

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

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?