After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?

How many grams of carbon dioxide are in 88.5 L at STP?

How many electrons, protons, and neutrons does Lithium have?

A container of gas has a volume of 3.5 L and a pressure of 0.8 atm. Assuming the temperature remains constant, what volume of gas would result if the pressure was 0.5 atm? A. 1.8 L B. 5.6 L C. 0.2 L D. 2.2 L

Which of the following statements are TRUE? 1 - Electron carriers are located at ribosomes. 2 - ATP is a common intermediate between catabolic and anabolic pathways.

Evaluate this statement: Substances are made of two or more types of elements

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

A liquid mixture in which particles can be seen and easily separated by settling or filtration is a a. solution. b. suspension. c. solvent. d. solute.

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors

Does density of water depend on the amount of water present?

Which of the following air fronts does not move? a Occluded front b Cold front c Stationary front d Warm front