How many moles of gas does it take to occupy 520 ml at a pressure of 400 torr and a temperature of 340 k
a.73.6 moles
b. 0.0098 moles
c.0.980 moles
d. 0.0735 moles

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

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.

What causes the appearance of lines in a emission spectrum