The activation energy Ea for a particular reaction is 42.2 kJ/mol. How much faster is the reaction at 343 K than at 316 K? (R = 8.314 J/mol • K)

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

An experimental procedure requires a 10 ml of acid to be dissolved

Name the element in group 17, period 2. (periodic table)