1. Calcula la cantidad de moles que hay en; a. 1,5 g de CaCO3}
b. 2.709 x 1024 moléculas de sulfuro de sodio Na2S
c. 2,5 dm3 de O2 en condiciones normales de temperatura y presión (PTN)
d. 200 gramos de F2O
La necesito para hoy, aydua por fa

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.