Two atoms collide while moving in a gas. The larger atom has a mass M1 = 6 Daltons and a speed v1 = 230 m/s, while the smaller has a mass M2 = 1 Daltons (D). During the collision both atoms simply bounce off each other. They do not change their speeds, but after the collision they each reverse their directions, bouncing straight back. (You may express your results using the mass unit "Daltons". 1 Dalton is approximately equal to the mass of a proton or neutron and is defined as one-twelfth the mass of a single neutral carbon-12 atom in its ground state.) What is the magnitude of the change in the momentum, Δp1, of mass M1?

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