Select the two chemical reactions that adhere to the law of conservation of matter. A

2As + 6 NaOH → 2 Na3AsO3 + 2H2

B

2H2O2 → 2H2O + O2

C

NaBr + Cl2 → 2NaCl + Br2

D

Zn + 2HCl → ZnCl2 + H2

E

8Ag2S → 10Ag + S8

F

Ba3N2 → 2Ba + N2

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together