The ash produced by the burning paper has much less mass than the mass of the original paper. Was mass conserved during this change? Explain your answer.

Why was undersea exploration important for developing the theory of plate tectonics

The space around the nucleus of an atom where the atom's electrons are found is called the

Suppose that you stir a green powder into a clear liquid. The liquid turns green. You leave the room and come back later to observe that the top of the liquid is clear again. A green substance has settled on the bottom of the container.

Does the temperature of water affect how fast salt dissolves

How many protons are in a electrons?

Originally, the periodic table was arranged by increasing atomic radius increasing atomic mass increasing atomic number increasing number of electrons

How many moles are in 15.5-g SiO2

Is Oxygen - O2 a pure substance or a mixture?

What atom has 14 protons and 14 electrons

What is a diagram showing the forces acting on a coasting bike rider traveling at 25 km/h on a flat roadway