What is the total pressure of a mix of three gases where they have 2.31 atm, 203.8 kPa and 479.1 torr of partial pressures? (Put final answer in mmHg)

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The answer is d. hope i !

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.