What is an example of a sweet substance containing a covalent bond?

Question

I am doing a scavenger hunt for my IPC class, and I cant find these last few questions. If you can help please do!
(for the examples, it would be great if they were easy to find in any house hold!) thanks to anyone who replies!

1) What is an example of a sweet substance containing a covalent bond?
2) What is an example of a substance with the ability to form iron oxide?
3) What is a sample of a Inert gas?

Answer 1

1) Glucose (but you could put just about any household item here...fructose, maltose, etc. etc. etc...any of the "oses" are going to generally be sweet)
2) Rust. Metal objects that contain iron will rust when they are exposed to air and water for a long enough period of time. Another good one would be hemoglobin. Hemoglobin has an iron group in it that takes up oxygen at the lungs and then transports it to other parts of the body.
3) Helium...definitely. We use this gas as a part of a larger machine used to analyze components of a mixture (called GC). The gas has to be inert or else it would react with components that are introduced to it. We only use it to carry the substance through the machine.

Answer 2

1. Regular sugar has covalent bonds
2. An iron nail can form iron oxide
3. Air contains 1 per-cent argon, an inert gas.
"Neon signs" (often seen at bars) contain the inert gas neon.

Answer 3

Glucose C6H12O6

Answer 4

1) see above sugar
2) steel
3) Helium

one example each

Answer 5

SUCROSE!!! table sugar
iron oxide is rust, what do you think rusts? xD
3) oh crap, i forgot