Explanation:
Percentage ethylene by weight = 57%
Percentage propylene by weight = 43%
Suppose in 100 grams of polymer:
Mass of ethylene = 57 g
Mass of propylene = 43 g
Moles of ethylene = 
Moles of propylene = 
1 mole =
molecules/ atoms
Units of ethylene = 
Units of propylene = 
a) Fraction of ethylene units:

b ) Fraction of propylene units:

Answer:
a) 0.210 j
/k
b) 0.032 j/k
Explanation:
Find the attachment for solution
Answer:
3/2a
Explanation:
The complete step by step answer is found in the attachment
Small bodies from which the planets are formed is called : Planetesimal.
Planetesimals that have survived to the current day are valuable to scientists since they contain information about the Solar System's formation.
Answer: D.
Explanation: D. Acetone, Acetone may be rinsed over materials to wash off the explosive residue.
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