posted by robin

One atom of Deuterium weighs 2.013553AMU. One atom of Helium weighs 4.002602AMU. In nuclear fusion, the process which powers the Sun and all other stars, 2 atoms of Deuterium are combined to form 1 atom of helium. Calculate the energy released by one such combination. (1AMU = 1.660539x10-27kg)

I really don't know what to do for this question. Even a formula would help me. thanks

  1. Damon

    E = m c^2

  2. drwls

    The formula you need is Einstein's famous
    E = m c^2

    You must have heard of that equation before.

    In this case, the m is the mass lost in the reaction

    2D -> He

    You must use units of kg for the mass loss, not AMU. Then multiply the square the speed of light (in m/s) and you will get the answer in Joules.

  3. Damon

    Well, I gave you the necessary equation but perhaps I should elaborate.
    You were given very precise values for the masses of the two deuterium atoms and the one He atom.
    Add the masses of two De atoms and subtract He atom.
    That is mass that disappeared, violating the laws of classical physics (conservation of mass) and requiring the use of Einstein's equation relating mass and energy.

Respond to this Question

First Name

Your Answer

Similar Questions


    What is the chemically combined substance of a hydrogen atom and a helium atom. please help me because i really don't know this is confusing really please and thankyou Hydrogen atoms don't normally combine with helium atoms. In fact, …
  2. physics

    An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is …
  3. Physics

    A sealed container of volume 0.10 m3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium. The distribution of speeds of helium atoms shows a peak at 1100 ms-1. Caluculate the temperature and pressure of the helium gas. …
  4. chemistry

    A helium atom weighs 6.65 X 10 to the negative 24 grams. How many helium atoms are contained in a 1.0 g sample?
  5. physics

    In the Sun, an ionized helium atom makes a transition from n =6 state to the n = 2 state, emitting a photon. Can that photon be absorbed by hydrogen atoms present in the Sun?
  6. Physics

    Imagine that your car is powered by a fusion engine in which the following reaction occurs. 3*deuterium--->helium + hydrogen + neutron The masses are (2.0141 u), (4.0026 u), (1.0078 u) and (1.0087 u). The engine uses 8.1 10-6 kg …
  7. Physics

    A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank?
  8. chemistry

    Which statement correctly describes an atom of the element helium?
  9. Chem---DrBob222

    Calculate the oxidation # for each atom in the molecule below. Can you help me with the rest. Thank you!!! H H H H / / / / H -- C ---C ===C ----N .. / / H H Group # # of E Oxidation # H 1 0 1 x 7 = 7 C 4 7 C 4 C 4 N 5 3 H atom attached …
  10. Chemistry/reading

    Although Rutherford's model was highly successful, scientists realized that it was incomplete. For example, hydrogen atoms contain one proton, and helium atoms contain 2, yet a hydrogen atom has only 1/4 the mass of a helium atom. …

More Similar Questions