Question

Classify each of the following pure substances as an element or a compound.
rust (Fe203)
hydrogen peroxide (H202)
methane (CHa) in natural gas oxygen gas (02)

a silicon (Si) chip

Answer 1

rust (Fe203) - compound
hydrogen peroxide (H202) - compound
methane (CH4) in natural gas - compound
oxygen gas (O2) - element
silicon (Si) chip - element