question_answer 57)

  Fill in the missing data in the following table.

Species property			Na-atom
Number of particles	2	-	-	0.5
Number of particles	-		-	-
Mass	36 g	-	115 g	-

 

Answer:

  For H2O Given, number of moles = 2 and mass = 36 g Number of particles = number of moles = 2 x 6.022 x 1023 = 1.2044 x 1024 For CO2 Given, number of particles = 3.011 x 1023 Number of moles of Mass of  moles x molar mass = 0.5 x 44 = 22 g ( molar mass of CO2 = 12 + 2 x 16 = 44) For Na-atom Given,             mass = 115 g Number of moles Number of particles = 5 x 6.022 x1023 = 3.011 x 1024 For Given,    number of moles = 0.5 Number of particles = 0.5 x 6.022 x1023 = 3.011 x 1023 Mass = number of moles x molar mass (molar mass of  = 24 + 2 x 35,5 = 24 + 71 = 95) = 0.5 x 95 = 47.5 g Thus, the completed table is as

Species property			Na-atom
Number of particles	2	0.5	5.0	0.5
Number of particles
Mass	36 g	22g	115 g	47.5 g