An experiment requires 15.0 ml of a 0.100 m solution of hcl. if you have a 12.0 m hcl stock solution in the laboratory, how would you prepare enough 0.1 m solution to run at least 3 experiments?

Missing question: 

A. add 0.833 mL 12 M HCl stock solution to 99.167 mL water. 

B. add 0.833 mL 12 M HCl stock solution to 49.167 mL water. 

C. add 0.833 mL 12 M HCl stock solution to 199.167 mL water.

c₁ - original concentration of the solution, before it gets diluted.

c₂ - final concentration of the solution, after dilution.
V₁ - volume to be diluted.
V₂ - final volume after dilution.
c₁ · V₁ = c₂ · V₂.
c₁(HCl) = 12.0 M.

c₂(HCl) = 0.100 M.

V₂(HCl) = 3 · 15.0 mL = 45.0 mL; for three experiments.

V₁(HCl) = c₂ · V₂ / c₁.

V₁(HCl) = 0.375 mL.

Make proportion: 0.375 mL : 0.833 mL = 45 mL : V.

V = 100 mL.

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

the dependant variable is spilled water

the independent is the heat