A radioactive isotope has a half-life of 2.5 years. Which fraction of the original mass remains unchanged after 10 years?

How long does it take for a purple stem plant to grow

How does the motion of particles in the sun's plasma compare to the motion of particles in a solid? particles in both the plasma and a solid move around to fill available space.

During which of the following processes does a glucose molecule break down using oxygen? A. Aerobic respiration B. Anaerobic respiration C. Fermentation D. Photosynthesis I think its A. but I'm not completely sure.

The way that a fluid flows depends on several factors. Briefly describe the factors - use as much scientific vocabulary that you can.

Which is most likely true about water in chemical systems A.) Water dissolves nonpolar ionic compounds B.) Water dissociates ionic compounds C.) Water dissociates covalent molecules. D.) Water dissolves nonpolar covalent substances.

The type of energy present in the bonds between atoms is

A mixture contains cobalt metal, copper metal, and tin metal. This mixture is mixed with nickel nitrate. Which metals, if any, will react? A. Cobalt only B. Copper only C. Tin only D. All 3

What are the common elements in a canyon?

How many carbons atoms are in propane?

This type of formula indicates the kind, number, arrangement, and bonds but not the unshared pairs of the atoms in a molecule.