What is the percent by mass of H in toluene (C7H8)? The molecular weight of carbon is 12.0107 g/mol and of hydrogen 1.00794 g/mol. Answer in units of %.

How does concentration affect reaction rate

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.