59 La massa atomica relativa dell'atomo di stagno è 118,69. Qual è la sua massa atomica assoluta?
60 La massa atomica assoluta del potassio è
6,49. 10-26 kg. Calcola la massa (in g) di 2. 1020
atomi di potassio.
61 La massa atomica relativa dello iodio è 126,905.
Calcola la massa atomica assoluta (in kg).
62 La massa atomica assoluta dell'ossigeno è
2,66 10-26 kg. Calcola la massa atomica
relativa.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

Ill give u brainliest pls how is mass of carbon conserved during cellular respiration