Can you explain this formula
Cs + N_ CS3 N

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.