Mass/Particle: How many molecules are in 8.3 grams of PCI5? Be sure to round your answer to the correct number of significant figures. (This answer will have to be written
in scientific notation. Here is an example with the format you should use to enter in your
2.5x102 = 2.5E2)

Easy definition for atom and atomic mass

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!