Why does an increase in temperature typically cause an increase in rate of reaction? Select one:
A. The collision frequency increases.
B . More of the collisions that occur are effective collisions.
C. The potential energy of the activated complex decreases.
D . A and B are both true.

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

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

How many atoms are there in 5.70 mol of mg