19.78 is the cost of silver per once
A. Gold,lead,glass,brick, and steel
b. 8 because they are all over 1.0 density level
c. ice and paraffin (maybe wood but that is not a liquid)<span />
Amino acids also contain nitrogen
Mixtures:
physically combined
components retain properties
compounds:
chemically combined
components change properties
both:
made of elements
variable proportions
fixed properties
2 or more compounds
hope this helps
comment me if you have any questions
So it’s OKAYYYYY ITS OKAYYYY