Write out the balanced equation for the reaction that occurs when ca and al(no3)3 react together. is it ca + al (no3)2 yields ca(no3)2 + al? why or why not?

-

The chemical reaction that is occurring is

Ca + Al(NO₃)₃ → Al + Ca(NO₃)₂

Balancing the nitrogen on both sides

Ca + 2 Al(NO₃)₃ → Al + 3 Ca(NO₃)₂

Balancing the calcium on both sides

3 Ca + 2 Al(NO₃)₃ → Al + 3 Ca(NO₃)₂

Balancing the aluminium on both sides

3 Ca + 2 Al(NO₃)₃ → 2 Al + 3 Ca(NO₃)₂

We see oxygen is balanced.

The balanced chemical equation for the reaction is

3 Ca + 2 Al(NO₃)₃ → 2 Al + 3 Ca(NO₃)₂

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

the atomic mass is the bottom number on the element.

-steel jelly