What is the limiting reactant when 5.5 mol of Ni(NO3)3 reacts with10.0 grams of NaOH? Ni(NO3)3 + 3Na(OH) -> Ni(OH)3 + 3NaNO3

a) If you wanted to design an experiment such that the limiting reactant from #5 was still the limiting reactant when it reacted with calcium phosphate, what mass of excess reactant could you use/ would you need? (multiple answers may apply)

One of these occurs (depending on the limiting reactant you chose):

6Na(OH) + Ca3(PO4)2 --> 3 Ca(OH)2 + 2Na3PO4

2Ni(NO3)3 + Ca3(PO4)2 --> 2Ni(PO4) + 3Ca(NO3)2

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

Predict the products butane (c4h10) + oxygen —>

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm