• Una masa de hidrógeno gascoso ocupa un volumen de 230 litros en un tanque a una presión de 1.5 atmósferas y a una
temperatura de 35°C.
Calcular, a) ¿Cuántos moles de
hidrógeno se tienen?, b) ¿A qué masa equivale el número
de moles contenidos en el tanque?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Which best describes how johannes kepler developed his laws of planetary motion

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine