An enzyme can affect a chemical reaction by bringing the reactant closer together - chemical bonds may be weakened, and reactions will happen faster than without a catalyst. The energy can also be lowered, which means reactions will proceed at a lower temperature, light presence, etc.
Given:
Ksp (CaF2) at 25 degrees Celsius = 3.9 x10^-11
volume of CaCl2 = 100 ml
concentration of CaCl2 = 2.3 x 10^-4 m
Volume of NaF = 500 ml
concentration of NaF = 5.0x10^-3 m
Total volume = 100 + 500 = 600 ml
balanced chemical equation:
2NaF + CaCl2 ===> CaF2 + 2NaCl
calculate the number of moles NaF and CaCl2. Then determine the resulting moles of CaF2 (based on the limiting reactant) and find the concentration of CaF2. If it is more than the Ksp, meaning there will be a precipitate.
Answer:
I think you may have chosen the wrong subject for your question, besides where is the context to this?
Answer:
C is the only option that represents an empirical formula, as it can't be simplified further.
You can turn C8H18, for example: to C4H9, but you can't do the same with C2H5.
Let me know if this helps!
Answer:
1mole of any substance contains 6.022x10²³atoms
2moles of Fe will contain
2x6.022x10²³atoms = 1.204x10²⁴atoms.
Have a Great day!