What can be observed about a substance that does not change the identity of that substance

What is one possible effect of a hurricane in Florida? Avalanche, Drought, Flood or Wildfire

Heating zinc sulfide in the air causes the formation of

A. what are the noble gases? b. what is a noble-gas configuration? c. how does noble-gas notation simplify writing an atom's electron configuration?

A train travels 120 kg kilometers two hours and 30 minutes what is the average speed

Why is it important to classify living things?

Which of the following statements is true? Selected Answer: D. At least two of the above statements (A-C) are true. Answers: A. Ions are formed by adding or removing protons or electrons. B. Scientists believe that solids are mostly open space. C.

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.

Given the following reaction 2Al + 3Cl2 - -> 2AlCl3 How many grams of AlCl3 aluminum chloride will be produced from 125 g of Al and 125 g of Cl2?

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO3 (s) → KCl (s) + O2 (g) [unbalanced] What mass of oxygen gas is formed if 26.4 g of potassium chlorate decomposes completely?

Explain the iodine clock reaction.