The burning of fossil fuels will release into the carbon-oxygen cycle. nitrogen soot oxygen carbon

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

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.