What volume is needed to store 0.050 moles of helium gas at 202.6 kpa and 400 k? (given: r = 8.314 l∙kpa/k∙mol)
a) 1.218 l
b) 121.8 l
c) 0.820 l
d) 8.21 l
e) 82.1 l

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

How hot is the suns corona? (integrated science)

What must occur for air masses to form fronts