Answer:
d) Make it flexible
Step-by-step explanation:
Raw hides dry out to form a hard material that can decay with an offensive smell when they become wet.
Tanning converts the protein of the raw hide into a stable material that will stay flexible and not decompose when it gets wet.
a) is <em>wrong</em>. The purpose of tanning is to soften the leather.
b) is <em>wrong</em>. You smooth the leather manually with fine sandpaper.
c) is <em>wrong</em>. Tanning does not impart water resistance. It prevents the leather from putrefying when it does get wet.
Answer: is a reactant; it is present before the reaction occurs.
Explanation:
In a chemical reaction the chemical formulas written before the arrow are described as reactants as they react together to form products which are written after the arrow.
Thus and HCl are reactants here whereas , and are products.
A comet<span> is an small, icy celestial body that releases gas when it gets near to stars in a process called outgassing. Thus, a</span><span>comet's environment is not stable, and it does not have an actual, permanent, atmosphere. A comet also does not have a reliable energy source. Thus, D. All of these are the answers on why comets cannot support life.
</span>
From my understanding its considered a compond