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Please explain Planck's hypothesis and Bohr's model and how these ideas shaped our modern understanding of the structure of the atom.
What volume (to the nearest 0.1 mL) of 6.00-M NaOH must be added to 0.650 L of 0.350-M HNO2 to prepare a pH = 3.30 buffer
A solution is prepared by dissolving 1.29 g of an unknown organic compound in 15.00 g of cyclohexane. What is the molar mass of the compound if the solution has a melting point of -5.1°C
What is the chloride ion concentration, [Cl-], in a solution made by adding 20.0 mL of water to 80.0 mL of a .125 M CaCl2 (aq) solution
Atmospheric pressure was 744.6 mmHg. Calculate the value of R from this experiment. The vapor pressure of water at 21 degrees Celsius is 18.7 mmHg.
Given the procedures described for using Pateur pipets from part A of experiment 0 as well as literature densities if needed, define how you would
A mixture of He, Ar and Xe has a total pressure of 2.70atm. The partial pressure of He is 0.450atm as well as the partial pressure of Ar is 0.200atm. Explain what is the partial pressure of Xe
Draw a graph of r against X, and noting that r and X can not to be negative, identify the portion of curve that corresponds to reality.
A 0.160 g sample of rock was found to have 2.11 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.11 × 10-6 mol of argon-40. How old was the rock? (What assumption is made about the origin of the argon-40?)
Calculate the number of moles of sodium bicarbonate orginally present in the unknown mixture, knowing that 20.0ml of 0.100M HCL were used in the step 2 of titration, using methyl orange as an indicator.
What is the empirical formula of cyclopentane? If the molar mass of cyclopentane is 70.1 g/mol, what is its molecular formula?
How many moles of CO2 form when all of the butane is the lighter burns. How many molecules of gas form when the butane in the lighter burns completely
Problem- A sample of 100 g of an unknown metal at 94 ?C is placed in 100 grams of water at 10 ?C. The final temperature of the metal and water are 17 C. What is the heat capacity of the unknown metal. The specific heat capacity of water is 4.18 J/..
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