Draw the structure of a compound with molecular formula C9H20 that exhibits four CH2 groups, all of which are chemically equivalent. How many total number of signals would you expect in the 1H NMR spectrum of this compound?

a. 2
b. 8
c. 3
d. 4

the maximum mass of nh3 is nh3 in grams

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.

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