How many moles of helium gas are present in 481.84x10^22 atoms? Given Na=6.023x10^23mol-1

Which position represents spring in the southern hemisphere? a) b) c) d)

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

Drug abuse will not lead to physical and psychological dependence. true or false ?