I think it might be B, and A
We are given with the equation 2H2O2 --> 02 + 2H2O . In an equation, the right-hand side contains the products while the left-hand side consists of the reactants or substrate. In this case, the enzyme used to enhance the rate of the process is catalase. The answer hence is <span>D. Catalase is an enzyme, O2 and H2O are products, and H2O2 is a substrate.</span>
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The periodic table is arranged by atomic weight and valence electrons. These variables allowed Mendeleev to place each element in a certain row (called a period) and column (called a group). The table comprises seven rows and 18 columns
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Explanation:
A sonar device sends pulses of sound waves down through the water. When these pulses hit objects like fish, vegetation or the bottom, they are reflected back to the surface. The sonar device measures how long it takes for the sound wave to travel down, hit an object and then bounce back up.