Which best describes an element? a. a pure substance b. a type of mixture c. a pure compound d. an impure substance

Acetone used for rinsing glassware Group of answer choices 1. Pour it down the sink where you are rinsing the glassware 2. Collect it and dispose of it in the organic or acetone waste container 3.

How many moles of KMnO4 can be produced from 0.886 moles of carbon dioxide?

Which of the following is a chemical process? A) Removing fish from water B) Removing the salt from sea water C) separating honey into sugar and water D) separating water into hydrogen and oxygen E) dissolving coffee in water

How many milliliters of a 10.6 M NaOH solution are needed to prepare 0.715 L solution of NaOH with a concentration of 0.550 M?

Which statement accurately discribe what happens when ice melts in terms of energy

Which of the following is not a possible sublevel? 1s 2p 3f 4d

Fish breathe oxygen, o2, dissolved in the water. since water is a polar substance and oxygen is a nonpolar substance, how can there be any oxygen, o2, in the water?

Barium carbonate, baco3, is stable at ambient temperatures, but decomposes to barium oxide and carbon dioxide at higher temperatures.

How do an isotope and a radioactive isotope differ?

What is a cause of polarity in water molecules?