If 25% of a radioactive element remains after 1,000 years, what is the half-life?

What are the covalent bonds called that form between atoms of different electronegativities? A. pure B. ionic C. uneven D. polar

A rock has a density of 8g/ml. If the rocks mass is 2g what is the rockets volume

If a 9.983 g sample of calcium sulfate dihyrate was heated in a crucible under the correct conditions, how many grams of water should be lost?

Determine the maximum number of electrons in the 2f designation

11 Na Sodium 23 what is the atomic Mass, Number, and the chemical number?

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.

What is the process all rocks are continuously in during which that can change into other types of rocks

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?

1. Why does CH30 evaporate faster than water?