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Match the concentration method with correct description.
Percentage by volume (% V/V), percentage by mass (% W/W), amount concentration (mol/L), percentage mass by volume (% W/V), parts per million (ppm), parts per billion (ppb)
A way of expressing very dilute concentrations of a substance ______
A way of expressing extremely dilute concentrations of a substance______
Used for solutes that are solids in pure form and are dissolved in a liquid solvent____
Used for solutions prepared by dissolving a liquid solute in a liquid solvent____
Used when both the solute and solvent are measured in grams____
Used when the solute is measured as a molar amount in one litre of solution____
Problem- you need to prepare 100 mL of a pH=4.00 buffer solution using .100 M benzoic acid (pKa = 4.20) and .160 M sodium benzoate, mL Benzoic acid =
Methyl alcohol (CH3OH) is made by reacting carbon monoxide with H2. Starting with 2.5 g of H2 and 30 L of CO, what mass of methyl alcohol could be produced at STP? which is the limiting reactant?
Question- Write not less than 500 words on the given topics. You may incorporate pictures, tables and information from internet (web), book and other resources to make your project interesting and full of knowledge. Project : Colloids in Industry ..
If the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car?
although even more strained than cyclopro-panone, is nevertheless quite stable and can even be distilled. Explain, taking the polarity of the carbonyl group into account.
When heated, potassium chlorate decomposes to yield oxygen and potassium chloride. Calculate how much heat is needed to yield 31.8 g oxygen by decomposition of the requisite amount of potassium chlorate.
show how each of these products may be generated.
A new element is discovered that is very unstable and highly reactive, and highly reactive edit likes to lose it's one valence electron.
The reaction 2NO+Cl2=2NOCl is carried out in a closed vessel. If the partial pressure of NO is decreasing at the rate of 20 torr/min, what is the rate of change of the total pressure of the vessel?
An unknown material begins to emit electrons from it's surface when exposed to photons with wavelengths shorter than 540 nm. Give the threshold frequency and the work function for this material.
What is the pH of the saturated solution of Ca(OH)2 (Ksp = 1.3 x 10-6). 12.14 8.11 11.06 12.37 2. To a 1.00 L solution containing 1.00 x 10-3 mole each of Ca2+, Sr2+, and Ba2+, 0.0100 mole of Na2SO4 solid is added
If the salt concentration of a soup is reduced from 5% to 3%, explain what will the effect on available water be
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