1. Will a precipitate form if solutions of potassium sulfate and barium nitrate are combined? If so, write the net ionic equation for the reaction.
2. Will a precipitate form if solutions of potassium nitrate and magnesium sulfate are combined? If so, write the net ionic equation for the reaction.
3. Will a precipitate form if solutions of barium chloride and sodium sulfate are combined? If so, identify the spectator ions and write the net ionic equation.
4. Write the net ionic equation for the precipitation of nickel(II) sulfide slader

Explanation:

1.

YES

K2SO4(aq) + Ba(NO3)2(aq) --> Ba(SO4)2(s) + 2KNO3(aq)

Net ionic equation

2SO4^2-(aq) + Ba2+(aq) --> Ba(SO4)2(s)

2.

NO

No precipitate is formed because KNO3, MgSO4, K2SO4 and Mg(NO3)2 all are soluble.

3.

YES

BaCl2(aq) + Na2(SO4)(aq) --> BaSO4(s) + 2NaCl(aq)

Net ionic equation:

Ba2+(aq) + SO4^2-(aq) --> BaSO4(aq)

4.

Ni2+(aq) + S2-(aq) ---> NiS(s)

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.