The enthalpy of formation of xef2 (g) is - 108 kj mol-1 and the bond dissociation enthalpy of the f-f bond is 155 kj mol-1. what is the average bond dissociation enthalpy of a xe-f bond

A thin-walled plastic bottle is sealed at an altitude of 19,000 feet. What would happen to this bottle if it is carried down to 1,000 feet?

1. Describe a few of the properties of ozone and compare these to the properties of diatomic oxygen.

The volume of oxygen gas changed from 10 ml to 11 ml as the temperature changed. is this a chemical change or a physcial change

Lead is an important input in the production of crystal. If the price of lead decreases, then we would expect the supply of a. crystal to be unaffected. b. lead to increase. c. crystal to decrease. d. crystal to increase.

What happens to the energy released by an exothermic reaction 1) it increases the bond energy of the reactants 2) it raises the temperature of the products 3) it is released into the surroundings It raises the temperature of the reactants

As you go down a family or group on the periodic table * the atoms become smaller and smaller. the elements become less reactive. the elements become more reactive. the atoms have more and more valence electrons.

What is the name of the horizontal rows in the periodic table?

Matter that has a uniform and definite composition is called?

Identify eight major tectonics plates by writing their names

How are atoms and elements alike and different?