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Consider the rotation of the Sun (M=1.989×1030 kg, R=6.955×108 m) if it were to collapse without losing mass into a neutron star with radius of R=11.3 km. Assume that the Sun and the neutron star are both solid spheres and that angular momentum is conserved during collapse. If the Sun's initial rotational period is 28.9 days, what would the new rotation period be? Express your answer in seconds.
Question- When a 3.00-g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 1.348 kJ•K-1, the temperature decreases by 0.400 K. Calculate the molar heat of solution of KCN.
The suppositions of the kinetic molecular theory are most likely to be incorrect for gasses under which of the subsequent conditions. Why
consider the dissolution of mns in water ksp 3.0 times 10-14.mnss h2ol picture mn2aq hs-aq oh-aqhow is the
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
The equilibrium expression for the reaction: 2C(s) + 2H2O(I) ? CH4(g) + CO2(g) is Keq = [CH4][CO2]. If an equilibrium reaction shifts to the right when the system is cooled, this indicates that the reaction is endothermic
buffer that has a pH of 9.80 and an osmotic pressure of 1.04atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? mHCN, mNaCN =
Determine why the 2s and 2p orbitals on Hydrogen are degenerate and they are not in the case of Lithium and calculate Kp at 5 degrees and enter your answer in scientific notation if delta H rxn= -128 kj/mol CH 3 OH,?
Problem- 1) Salicylic acid has the following solubility profile in water: 0.2 g/100 mL@ 20 0C and 7.5 g/100mL @ 100 0C; would water be a good solvent for a single-solvent recrystallization of salicylic acid (explain your reasoning)
a 5.0 g sample of a hydrate of CaCl2 was heated, and only 4.3 g of the anhydrous salt remained. what percentang of water was in the hydrate?
A chemist studying the properties of photographic emulsions needed to prepare 500 mL of 0.156 M AgNO3(aq).
Question- Calculate millimoles and mass of oxalate in the unknown sample from the following data: Mass of unknown sample is 0.5060 grams. Volume of potassium permanganate solution titrated is 30 mL.
Explain how many allylic protons are in beta carotene. Define what are the most acidic Protons. Depict the structure of the most stable conjugate base of beta carotene.
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