0.15
calculate the amount of NaOH required in neutralising the sulphonated mass. calculate the remaining sulphuric acid stoichiometrically. from that you get percent sulphonations. or take sample and carry out titration
Amount obtained (how much stuff you ended up with)/ Starting amount ( how much stuff you originally started with) x 100= percent recovery Amount obtainedx 100 = percent recovery Starting amount Example: I started with 10g of some impure compound, I purified the compound and ended up with .25g, to find the percent recovery simply plug in numbers... .25/10 x100= 2.5% recovery
Double the amount of solvent.
It is not clear what you want to calculate about the electron.
RRF= (area or height peak X amount IS)/(area or height X amount pk) IS is the internal standard
37.16% is the expected yield in the reaction of salicylic acid and acetic anhydride used to form aspirin.
percent increase=(new amount-original amount) _____________________ original amount
Divide 350 by 79% .
There is really no way to calculate nickel percent in chocolates. There will be a different amount in all kinds of chocolates and none in some.
You calculate the total amount of whatever it is that you want to find the silicon abundance for. Then you calculate the amount f silicon in that. Then percentage abundance of silicon = 100*amount of silicon/total amount Typically the amount would be measured as the mass.
-- Divide the new amount by the original amount. -- Multiply the quotient by 100. -- Subtract 100 from the product. -- The difference is the percent reduction.
Since salicylic acid is being reacted with excess acetic anhydride, salicylic acid is the limiting reactant of the reaction. The balanced equation of the reaction of salicylic acid and acetic anhydride indicates that their is a 1:1:1:1 ratio between every reactant and product. Based on this, it can be concluded that the moles of salicylic acid, if reacted entirely, will yield an equivalent amount of moles of aspirin. To find the theoretical yield, you must know the molecular weight of aspirin and salicylic acid. First, the amount of moles of salicylic acid must be calculated by dividing the gram amount of salicylic acid, which is 85 grams, and dividing it by its molecular weight, which is 138.12 grams per mole.85.0/138.12= 0.615 moles of salicylic acidThis is the mole amount of salicylic acid as well as the theoretical mole amount of aspirin. To convert the mole amount of aspirin into grams, this figure be multiplied by the molecular weight of aspirin, which is 180.15980.615 x 180.1598 = 111 grams of aspirin (when rounded to 3 significant figures)
Two percent is equal to .02 so you can multiply by that amount. For example 2% of 397 is 7.94
$54.85
33.7425, which will round to 33.74 ; percent off means to calculate the percentage, then subtract from the original amount.
You have to calculate 400,000 x 1.5 / 100. (Percent means hundredths; the idea is to calculate 1.5 hundredths of the amount.)
56.72