A redox reaction always involves

A. a change in oxidation number

B. a change in phase

c. the transfer of protons

D. the formation of ions

How many oxygen atoms are in 1.60 g of quartz? hints?

How does the nucleus of a copper atom compared to the nucleus of a nickel atom

Which of the following is the best definition of a mineral? a naturally occurring liquid that can be used to make oil a crystalline solid that occurs naturally on Earth a substance made from raw materials a material that people make for some purpose

100 g of radioactive mass has a half life of 5 days Calculate the mass decayed off after 15 days

Which relationship or statement best describes delta s for the following reaction: 2H2S (g) + 3O2 (g) - -> 2H2O (g) a) Delta S = 0 b) Delta S < 0 c) Delta S> 0 d) Delta S = Delta H |T e) More information is needed to make a reasonable prediction.

Balance the following chemical equation: / text{CH}_ 4 + CH 4 + start text, C, H, end text, start subscript, 4, end subscript, plus / text{O}_ 2 / rightarrow 2 →start text, O, end text, start subscript, 2, end subscript, right arrow / text{CO}_2 +

How did the invention of the spectroscope in 1859 change the science of chemistry

Will zinc and sodium carbonate react?

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number