The element antimony (sb) has an atomic mass of 121.76 amu. two naturally occuring isotopes of antimony are 121sb (57% abundant) and 123sb (43% abundant). in a sample of 100 sb atoms, what is the probability that a single selected atom has a mass of 121.76 amu?

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Which of the following happens during cell division? (a) energy is created (b) waste is eliminated (c) carbon dioxide is released (d) damaged cells are replaced

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.