6 A reaction between a solution of sodium carbonate is mixed with a solution of
calcium nitrate to cause a precipitation reaction. If 338.9 mL of 0.799 mol/L sodium
carbonate is added to 677.4 mL of 1.159 mol/L calcium nitrate, what is the mass (in
g) of precipitate that forms? Provide your answer to two decimals.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

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

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.