How many molecules are in 5 moles of O2? A. 3.10 x 1024
B. 3.010 x 1023
C. 6.02 x 1024
D. 3.010 x 1024

It has to be b i hope this

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood.