Elements can be separated into simpler substance by chemical reactions.

a. True

b. False

The compound Al (OH) 3 contains how many atoms of oxygen? 1 2 3 4

Explain in terms of electrons why the bonding in NaCl is ionic. 2Na (s) + Cl2 (g) - >2NaCl (s)

What coefficient will O2 have after balancing this equation? CH2 + O2 + CO2 + H20

Science has shown that air pollution can cause a variety of health issues in our society. Which of the following can be a health problem caused by air pollution? I think its b? A. Diabetes B. Respiratory distress C. Psoriasis D. Dehydration

The main function of the circulatory system (at least a paragraph) !

If acid is splashed on your lab partner, immediately do which of the following? A. Wipe them off with a paper towel. B. Wrap them in the fire blanket. C. Flush the area with lots of water. D. Spray them with the fire extinguisher.

Consider these elements: p, ca, si, s, ga. a. write the electron configuration for each element

When you push or pull on something, you are using a

Write the proper word equation for the following chemical reaction: 2Fe (s) + 3F2 (g) 2FeF3 (s).

When iodine solution is mixed with an unknown sample of food, the mixture turns a blue black color. this color change indicates the presence of?