Which phase change represents a decrease in entropy? (1) solid to liquid (3) liquid to gas (2) gas to liquid (4) solid to gas

Based off of the plum pudding model, what should've happened in the gold foil experimet

Which element could likely substitute for Si in a solid solution

2. What is the difference between a formula unit for an ionic compound and a molecular formula for a molecule?

Why is it important to repeat the steps or an experiment multiple time

A student claims that during a crescent moon phase, the sun's light is only shining on the moon a tiny bit and during a full moon, the sun's light is shining on the entire moon. Do you agree or disagree with this claim? Explain.

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?

What are the two main classifications of energy resources?

A liquid is heated and a solid forms at the bottom of the beaker. Is this a physical or chemical change?

How to predict the formula of an ionic compound based on the charges of the ions?

Which of the following kingdoms in one-celled organisms