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1. How do you make a 2.2M NaCl solution in the amount of 340µl. The stock solution is 5.7M
2. If 25 ml of solution A is needed to make a 0.7 liters with a final concentration of 1.5%, what was the concentration percentage of the stock solution?
3. In the lab, Jose made a 2X TBE working solution in the amount of 1.0 x 10^3 ml. He remembered he started with a 10X TBE but did not write down the amount. Calculate the amount of TBE Jose used to make his working solution.
Write a formula for the conjugate base formed when each of the following behaves as a bronzed acid.
if 3.55 mL of vinegar needs 43.0 mL of 0.130 M sodium hydroxide to reach the equilavence point in a titration, how many grams of acetic acid are in a 1.6qt sample of this vinegar?
Assume that the estimates of the standard deviation for the mean mass of a series of three measurements, a serious of six measurements, and a series of nine measurements were identical.
Is PH3 polar or nonpolar, and why? Some sources say it's polar because of the lone pair. Others say it's nonpolar
The dipole moment, meu, of HBr (a polar covalent molecule) is 0.82 D (debye), and its percent ionic character is 12.1%. Estimate the bond length of the H-Br bond in picometers.
obtain the positions of the wavefunctions nodes from the roots of the corresponding Hermite polynomial, and (d) from your answers to (b) and (c), sketch the wave functions, indicating nodes and boundary conditions behaviors at +/- infinite in the ..
Which lists the 4 ions present in a dilute solution of H2SO4 in order of increasing concentration? why?
A compound is found to be 26.95% sulfur, 13.43% oxygen, and 59.61% chlorine by mass. What is the simplest formula of the compound?
Calcium carbonate reacts with hydrochloric acid to forma a salt, carbon dioxide and water. Write the balanced equation and determine how many grams of salt will be produced of 50g of calcium carbonate was used?
Calculate the number of grams of alcohol present in 1.00 L of 69 proof gin. The density of ethanol is 0.798 g/mL.
tryptophan in the environment was exhausted, the bacteria started to excrete a metabolite on the tryptophan biosynthetic pathway. why didnt the bacteria excrete the metabolite before exhausting the environmental tryptophan?
This time took a one-hour break after adding the acetic anhydride but before adding the sodium acetate solution. The student obtained no product. Explain, with chemical equations and/or formulas, what went wrong.?
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