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Why do I need to learn this?
What's that formula?
100

What is the common name for H2O?

Water.

100

What is gold used for?

Money, jewelry, and electronics.

100

What is the formula for Potassium chloride?

KCl

200

What is the common name for NaCl?

Salt.

200

Where is Mercury used?

As a vaccine Preservative, to check temperature in thermometers, and fluorescent lights.

200

What is the formula to Potassium Sulfide?

K2S

300

What is the common name for Fe2O3 

Rust.

300

What is Rust used for?

As a pigment in cosmetics. Also used in magnetic tape (how cassettes and vhs could even manage to record stuff). 

300

What is the formula to Lead (II) fluoride?

PbF2

400

What is the common name for NaOCl

Bleach.

400

What is zinc used for?

Used to galvanize steel to protect from corrosion

400

What is the Formula to Aluminum Oxide?

Al2O3

500

What is the common name for N2O?

Laughing gas.

500

What is Phosphorus used for?

An essential element in the body and to life itself. it is also used to start matches. 

500

What is the formula to chromium (III) oxide?

Cr2O3

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