What are the starting substances in a chemical reaction called?

a.aljebeai

deaquanita.lancelin

veena.s-smf

v.stellawm

nelsonhonorio

maog.june

dmeyer

mike.woo

josullivan

ldomingo

rijjakashan579

nhornyak

ben.lawson

rijjakashan579

calista.carson

mroehm

grantm

brandy.korth

max.ortiz