What does synthesis gas (water gas) consist of?

a. oxygen (O2) and hydrogen (H2)
b. methane (CH4) and water (H2O)
c. carbon dioxide (CO2) and hydrogen (H2)
d. carbon monoxide (CO) and hydrogen (H2)

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car