Nuclear fusion in the sun involves hydrogen (h) atoms combining to form helium (he). a student claims that since the atmosphere contains hydrogen, any fusion reaction on earth would result in an uncontrolled chain reaction. what is wrong with the student's reasoning? the hydrogen in air is not densely packed enough for an uncontrolled chain reaction. uncontrolled chain reactions can only happen during nuclear fission. it is impossible to cause a fusion reaction to happen anywhere outside of the sun. we are safe because there is no radioactive hydrogen in the air.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Amines are good nucleophiles, even though they are neutral molecules. how would the rate of an sn2 reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? amines are good nucleophiles, even though they are neutral molecules. how would the rate of an reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? because both reactants in the rate-limiting step are neutral, the reaction will be faster if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will be slower if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will occur at the same rate if the polarity of the solvent is increased. request answer

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas