The rate constant for a certain reaction is k = 6.20×10−3 s−1 . If the initial reactant concentration was 0.200 M, what will the concentration be after 20.0 minutes?

Agas occupies 475 cm^3 at 313k. find its volume at 367k. you must show all of your work to receive credit. be sure to identify which of the gas laws you will be using

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?