Primary and secondary amines form hydrogen bonds among themselves. Assume you have a solution of ethanamine (ethylamine). Several proposed amine dimers are presented with the hydrogen bond highlighted as a dotted line. Draw 2 molecules of ethanamine and show a hydrogen bond formed between them.

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Gymnast always perform on padded mats. how does the mats protect the gymnast

What is the standard unit of measure for acceleration?