The half-life of isotope XX is 2.0 years. How many years would it take for a 7.0 mg sample of XX to decay and have only 0.4375 mg of it remain?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.

What is the volume of 3.2 moles of chlorine gas (cl2) at 295 k and 1.1 atm?