What always occurs during a chemical reaction? A. A change in color. B. A change in shape. C. A change in energy. D. A change in state.

Which two structures would provide a positive identification of a plant cell under a microscope? Answers: 1. plasma membrane, large central vacuole 2. cell wall, mitochondria 3. cell wall, chloroplast 4. ribosomes, chloroplasts

Which of the following processes involve radioactivity? in medicine oxidation-reduction reactions carbon-14 dating gas grills (can have more then one answer)

How many atoms are in 85.1 grams of neon

Which uses of soil are discussed in the video? Check all that apply. as a habitat for animals to live in as a way to clean and store water as a place for plants and crops to grow as a material to clean and smooth skin as a building material for

What does a triple beam balance measure?

Calculate the number of miles of aluminum oxide in 6.83 g AL2O3

What is the approximate percent by mass of oxygen in C2H4O2

During a period of discharge of a lead-acid battery, 405 g of Pb from the anode is converted into PbSO4 (s).

What is the density if the weight is 40.5 and the volume is 15.0

In an Antarctic ecosystem, phytoplankton are eaten by krill, which are eaten by baleen whales. If the population of phytoplankton suddenly decreased: The population of whales would increase. The population of whales would decrease.