El aire exhalado contiene 74,5g de N2, 15,7g de O2, 3,6g de CO2 y 6,2g de H2O. En un espacio de 2.1 L y 37°C a. Calcule la fracción molar de cada gas

b. Calcule la presión parcial de cada gas

c. Calcule la presión total del sistema.

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas

Where are electrons with the lowest energy found? in the nucleus farthest from the nucleus outside the atom closest to the nucleus