11. Start level 3 of the balancing equation game. Take turns and write down the equations as you solve them, along with any new strategies you needed for balancing. CHALLENGE QUESTIONS: BALANCE THE EQUATIONS BELOW.

A. ___ NaNO3 + ___ PbO  ___ Pb(NO3)2 + ___ Na2O

B. ___ Ca3P2 + ___ H2O  ___Ca(OH)2 + ___ PH3

C. ___Fe2O3 + ___ CO  ___Fe + ___ CO2

D. ___NH3 + ___ O2  ___ NO2 + ___ H2O

E. ___FeS + ___O2  ___Fe2O3 + ___SO2

F. ___ C3H6O2 + ___ O2  ___ CO2 + ___ H2O

What element is in the lathanide family?

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

This drawing shows a human body system. what is the primary function of this body system?