Una mezcla sólida formada por las sustancias A, B, C Y D contienen las siguientes cantidades: 15 g de A, 40g de B, 150g de C y 350g de D. Halla el porcentaje en masa de cada sustancia. Sería una gran ayuda, gracias ^^.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.