What is the mass of #5.42# #cm^3# of table sugar?

1 Answer
Feb 27, 2016

Answer:

From this site I learnt that the density of table sugar is #700# #kg*m^-3#. So the answer is a bit under #4# #g#.

Explanation:

In handier units this is: #700*cancel(kg)*cancel(m^-3)xx10^3*g*cancel(kg^-1)xx10^-6*cancel(m^(3))*cm^-3# #=# #0.7*g*cm^-3#, or #0.7*g*mL#.

So (finally) the answer to your question is #5.42*cancel(cm^-3)xx0.7*g*cancel(cm^3)# #=# #4*g# approximately!

It is a fact that sugar DOES NOT dissolve in hexanes. Given that #rho_"hexanes"# #=# #0.67*g*mL#, should sugar float in hexanes? Can you account for the fact that sucrose, #C_12H_22O_11# is insoluble in hexanes?