Catalase is an enzyme found in many cells. It acts as a catalyst to break down hydrogen peroxide (a toxic chemical) to water and oxygen. If hydrogen peroxide is
added to a test tube containing chicken liver (which contains catalase), a chemical
reaction occurs, evidenced by production of bubbles. If the liver is heated no
reaction occurs. If vinegar is added to the liver, there is no reaction. Explain what
has happened based on what you know about enzymes.

Acycloalkane molecule contains 8 carbon atoms. how many hydrogen atoms are present in the molecule?

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device