A fórmula de estrutura seguinte representa o limoneno, uma das substâncias que se pode encontrar no limão. Determine o número de moléculas de limoneno presentes em 4,00 g desta substância. Apresente todas as etapas de resolução. Comece por identificar a fórmula molecular deste composto.

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material