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Questions in chemistry
📝 Answered - Iron is a solid, grey metal. Oxygen is a colorless gas. When iron and oxygen chemically combine, rust is formed. Rust has a reddish-brown color. **Why does rust differ from iron and oxygen?**
📝 Answered - A water molecule gains enough energy to enter the gas phase. Is this a chemical or physical change? Why?
📝 Answered - How many grams are in 2.4 moles of sulfur?
📝 Answered - How many grams are in 11.9 moles of chromium?
📝 Answered - Explain why animals must eat food, but plants do not have to.
📝 Answered - What are three physical properties of aluminum foil?
📝 Answered - What kind of particles make up a compound?
📝 Answered - Why does land heat up faster than water?
📝 Answered - Explain Fajan's Rule.
📝 Answered - Why is mitosis a form of asexual reproduction?
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