How many moles would be in 8.40 grams of octane, C3H18?
0.0735 moles
0.645 moles
5,04 x 10" moles
959 moles
US
5:43

- decrease the number of plants and animals living in the water.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest