M refers to molar. Molarity is the number of moles of a solute dissolved in one liter of solvent. 3M means there are 3 moles of sulfuric acid in one liter, and 9M means 9 moles of sulfuric acid are dissolved in one liter.
One mole of H2SO4 weighs 98.07 grams. A 1.0 molar solution would be mixed by putting 98.07 grams of H2SO4 (not possible, it is not available in this form at 100% but for arguments sake) in a 1 liter flask and adding water until the volume is exactly 1 liter of chemical. 3 Molar would be 3x98.07 grams and 9 molar would be 9x98.07 grams.
To calculate the density of 9.0 M H2SO4:
Volume used: 16,0 mL
(9 M)(Vol in Litres)(Molar mass of H2SO4 which is 74,12g/mol) = 14,12g
The density of anything = X grams product/ Y grams solvant(water in this case)
Therefore the density for this exemple: D = 14,12g / 16mL
= 0,883g/mL
3M is half as concentrated as 6M
25mL * 3M / 8M = 9.4 mL
To prepare a 3% acetic (ethanoic) acid solution, you must first standardise the ethanoic acid. This question assumes that has already been done. To make the concentration 3%, there must be 30g per 1000mL (30gL-1). Dissolve or mix in 30g of ethanoic acid per 1000ml (1L). Pipette this into aliquots of 100mL samples. You now have a 3% ethanoic/acetic acid solution.
Transfer approx. 600 mL of demineralized water in a 1 L volumetric flask; add very slowly 324,24 mL of 98 % sulfuric acid. Wait to cool at 20 0C in a thermostat; add slowly water up to the mark. Avoid splashes ! Stir the content of the flask, transfer the solution in a tightly stoppered glass or polythene bottle; put a label on the bottle containing the name of the solution, concentration, date, operator. For accuracy is necessary to titrate the solution with sodium hydroxide.
We need 158,3 mL HrPO4 5M.
3M is half as concentrated as 6M
Dildo's...S......So many Dildo's
25mL * 3M / 8M = 9.4 mL
There is a formula for the "difference of squares." In this case, the answer is (3m + 13n)(3m - 13n)
To prepare a 3% acetic (ethanoic) acid solution, you must first standardise the ethanoic acid. This question assumes that has already been done. To make the concentration 3%, there must be 30g per 1000mL (30gL-1). Dissolve or mix in 30g of ethanoic acid per 1000ml (1L). Pipette this into aliquots of 100mL samples. You now have a 3% ethanoic/acetic acid solution.
Transfer approx. 600 mL of demineralized water in a 1 L volumetric flask; add very slowly 324,24 mL of 98 % sulfuric acid. Wait to cool at 20 0C in a thermostat; add slowly water up to the mark. Avoid splashes ! Stir the content of the flask, transfer the solution in a tightly stoppered glass or polythene bottle; put a label on the bottle containing the name of the solution, concentration, date, operator. For accuracy is necessary to titrate the solution with sodium hydroxide.
The price of a 3m dual lock can vary depending on the manufacturer and provider. In general, a 3m dual lock will fall in the price ranges between $30 and $120.
3m has better qualities (it will stick in colder and hotter weather and won't come unwrapped on it's own as easily)
12meters
3km is always 3km it makes no difference if you run or walk
3m
9m + 9m + 3m + 3m = 24m