Moles tell you how much of something you have, molarity tells you the concentration of a solution. I also got 0.277ppm assuming your calcium is 6.92μM, either your test is off, or it is actually micromoles not micromolar and you have to take into account the volume of solution that you...
Parts per million (ppm) is a unit of concentration. When concentration of a substance is low, such as water contaminated with certain metals (iron, cadmium or magnesium), ppm becomes more convenient than standard units of concentration – molarity or weight percent – used in chemistry. A mole...
Molar Concentration to Percentage ConversionChemical Formula: (optional) Molar Mass: Concentration: Molar Concentration:H 0 1 2 3 4 5 6 7 8 9 He Li Be ( ) B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr ...
was measured accurately using MS during the POWS reaction, to obtain the18O/16O ratio of the evolved O2. This ratio was then compared with that of the original water used for the reaction. Obviously, if the OER triggers the AEM, the two ratios will be similar, whereas the LOM leads to...
The molarity of enzyme active sites (E) was calculated from the protein concentration, assuming a molecular mass of 38,595 Da for the protein subunit. It was used to determine the turnover number, using the relationship kcat = Vmax/E. Experiments were performed in triplicate (S.D. ≤ 15%...
In the typical run, the reactor was loaded with 75 mL of aqueous solution with a constant molarity (0.133 M); 0.375 g of 5% Pt/Al2O3 catalyst was added without any pretreatment. Preliminary tests in which the catalyst was subjected to a reducing environment did not affect its ...