What are the starting substances in a chemical reaction called?

a.aljebeai

deaquanita.lancelin

veena.s-smf

v.stellawm

nelsonhonorio

maog.june

ldomingo

mike.woo

josullivan

dmeyer

rijjakashan579

nhornyak

ben.lawson

rijjakashan579

calista.carson

grantm

mroehm

brandy.korth

krista.haun