14) Oxygen-15 has a half-life of 2 minutes. How old is the substance after 5 half-lives?

When fossils fuels are burned what is their chemical potential energy converted into?

What is the formula to find the Molarity of a solution?

What happens during a physical change? A. New substances are found B. the identity of the substance is changed C. A chemical reaction occurs D. A substance may look different but not lose its identity

Why did the flame of the burning match or splint go out sodium carbonate and hcl?

Give an example of a chemical change related to (something that we do in the kitchen.) Explain why?

You add heat to matter, the atoms that make up the matter will begin to move?

What is the h2 h2o molar ratio?

Which of earth's systems was most affected by fossilized dinosaurs? A. Biosphere B. Hydrosphere C. Lithosphere D. Atmosphere

What factors are used to determine whether a bond will be polar or nonpolar? And what factors are used to determine whether a molecule will be polar or nonpolar?

The model of the atom evolved over time as scientific investigations uncovered new properties and observations about the atom. Describe the function of a model in scientific investigations.