Discover Questions

Calculate the [H3O+] and [OH−] for a solution with the following pH values:
pH= 4.7? In an experiment Jim flips a fair coin and then rolls a fair die. What is the probability he gets a head and a three? Did FBI find Smolett dna on envelope? What's the heat of reaction if used 100g of Aluminum to form thermite?And how many grams of iron oxide would you need? (Fe2O3+2Al>Al2O3+2Fe)? Reading off a normal distribution table, we have:
(a - 20) / 5 = 1.2816
a - 20 = 1.2816 * 5
a - 20 = 6.408
a = 20 + 6.408
a = 26.408?