Acracker crushed in water will test positive with iodine but negative with benedict’s solution. a
cracker crushed in water has another chemical called amylase added to it. after a few minutes,
this cracker tests negative with iodine and positive with benedict’s solution. explain what
happened.

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

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