In order to turn oxygen gas into a liquid, it must be . A. turned into a solid first
B. cooled down
C. heated up
D. mixed with water

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?