Answer : All of the above are valid expressions of the reaction rate.
Explanation :
The given rate of reaction is,
The expression for rate of reaction for the reactant :
The expression for rate of reaction for the product :
From this we conclude that, all the options are correct.
C. Sn (tin) is a metal, Si (silicon) is a metalloid, and C (carbon) is a nonmetal
Two German chemists, Justus von Liebig (1803–1873) and Friedrich Wöhler (1800–1882), were responsible for the emergence of organic chemistry in the early nineteenth century. Their quantitative analytical methods helped establish the constitution of newly isolated and synthesized carbon compounds.
The larger the piece the longer it will take to break down. This is because it has more mass that needs to be broken down.