Answer:
63.5474U.M.A. es la masa atómica promedio del cobre
Explanation:
La masa atómica promedio de un átomo es definida como la suma de las masas de los isótopos multiplicada por su abundancia. Para el caso del cobre que tiene dos isótopos:
Cu = Masa 65Cu*Abundancia + Masa 63Cu*Abundancia
Reemplazando con los valores dados en el problema:
Cu = 62.9298U.M.A.*0.6909 + 64.9278U.M.A.*0.3091
Cu = 63.5474U.M.A. es la masa atómica promedio del cobre
Answer:
Heat flows from the lower-temperaturesubstance to the higher-temperaturesubstance. Heat does not flowbecause both substances are at the same temperature. ... Heat is the energy that flows between twosubstances of different temperatures.Heat is the energy that flows between two substances of different temperatures.
Did not understand the second question
If we are working in a coordinate plane where the endpoints has the coordinates (x1,y1) and (x2,y2) then the midpoint coordinates is found by using the following formula:
midpoint=(x1+x22,y1+y22)