Butter melt when you heat it in a pan on the stove. Is this a chemical change or physical change? How can you tell?

Why is only one molecule of N2 needed to produce 2 molecules of NH3?

The octet rule states that, in chemical compounds, atoms tend to have

Air with a relative humidity of 100 percent is said to be

Bronze is an alloy, which is what form of matter?

Out of 2 elements, how do you know which one is more metallic?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.

What is a comet? tell in a short and easy answer