PLZ HELP ME..ITS MY TEST Cr gets reduce from 3+ to 0. It is a/an
A:Oxidizing agent
B:Reducing agent
C:Ion
D:None

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Rank the four gases (air, exhaled air, gas produced from from decomposition of h2o2, gas from decomposition of nahco3) in order of increasing concentration of co2