The table shows data about abiotic factors of streams in two different watersheds. In general, a stream with a lower temperature and more neutral pH tends to be
healthier. Based on these criteria, which watershed contains the healthier
stream?

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %