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Silver metal has a density of 10.5 g/cm3. How many silver atoms are in a cube that measures 5.00cm on each side?
Question- What is the pH of the solution which results from mixing 50.0 mL of 0.30 M HF(aq) and 50.0 mL of 0.30 M NaOH(aq) at 25 °C? (Ka of HF = 7.2 × 10-4)
What is radiometric titration principle and procedure of radiometric titration
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL acid in a flask. You quickly add 20.00 mL of 0.0414 M NaOH but overshoot the end point, and the solution turns deep pink.
1. Barium chloride in aqueous solution reacts with sodium sulfate in aqueous solution according to the following equation:
assume standard biological conditions and that all the enzymes are present to catalyze the reactions . the following are sequential enzyme reactions in a pathway
Describe an experiment using only hot and cold water that would enable you to verify that the heat capacity of your coffee-cup calorimeter is about 1.0x 10 1J/degrees C. Be specific
The initial concentration of lead(II)nitrate is 0.250M. and we used 1.00 ml. the lead(II)nitrate was titrated with 7.96 ml of 0.0500M of potassium iodide.
Use the dipole moments of HF and HCl ( HCl= 1.08 D, HF= 1.82 D) together with the percent ionic character of each bond (HCl 20% ionic, HCl 45% ionic) to estimate the bond length in each molecule.
Estimate the new PE ratio for the firm if the risk-free rate increases by 1 percentage point?
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
Determine the electron geometry and explain your answer for the Si atom in SiH4.
A sample of pure oxalic acid hydrate was obtained by extracting a plant called Snake Tongue. A 3.000 g sample of the materials heated carefully in a vacuum oven until no more mass was lost from the sample.
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