I think the answer is A. Hope that helped :)
La respuestas de lo que descirbiste es 18.02 gramos
Saludos
Answer:
A water repellent protein that divides into hard and soft types
The answer is (1). The hydrocarbon is a compound consists only with carbon and hydrogen. Ethane is C2H6. Chloroethane is C2H5Cl. Ethanol is CH3OH. Ethanoic acid is CH3COOH.
Answer: D, 130 grams.
Explanation: All reactants added up equal 130, and matter cannot be created or destroyed. Hope this helps!