5. What is the value of k for a first-order reaction with a half-life of 23.1 s?

At stp, what is the volume of 1 mole of co2?

The p sub shell can hold up to 8 electrons in an atom. true or false?

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