One mole of carbon-12 has a mass of 12.00 grams. What is the mass of a 12C atom? Multiple Choice O 1.244 x 10-26 kg
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- 2/3 2/3 1/2 1/2 1/2 According to the plots choose the appropriate indices from below: A. [120] B. [001] C. [10] D. [112] E. [301] F. (111] G. H. [012 1. (230) J. (233) K. (131) L (135) M. (300) N. (100) O. (111) P. (010) What is the Direction of OA?49Do u know what is kg atom-1 in the equation? how did they convert kg mol-1 to kg atom-1?
- +92 9 メ で a 9ェ 5,2 Cm 9=1,8MC ?っこ,84C 44= 11,84 C CACULAT F iN q, THAT PRODUCE 9. 9. AND 4 AND Fy 2 of of7. Calculate the energy (J) of a pure elemental sample weighing 0.5 g. 8. Determine the mass (g) of a sample with an energy of 1.78 eV.Label the 4 elements marked with red numbers in terms of the spherical coordinates (r,theta,phi). +y 2- 4 1 dộ dr = r sin(theta) = r sin(theta) d phi = rd phi =
- 4:54 Question 8 of 14 Which of the following indicates a spontaneous reaction under standard conditions? A) K = 8.6 x 10-² B) K = 7.9 x 10-8 C) K = 2.2 x 10² D) K = 9.2 x 10-45 E) K = 0.14 ..5GW Tap here or pull up for additional resources Submit (…7. A body of unknown temperature is placed in a refrigerator at a constant temperature of 0 °F. If after 20 minutes the temperature of the body is 40 °F and after 40 minutes the temperature of the body is 20 ° F, find the initial temperature of the body. (use Newton's Law of Cooling/Warming) 8. A radioactive substance is known to decay at a rate proportional to the amount present. If initially there is 50 milligrams of the substance present and after two hours it is observed that the substance has lost 10% of its original mass, Find the time at which the material has decayed to one half of its initial mass.
- The normal boiling point of radon is -95.8 F.What is this temperature in kelvins?QUESTION 10 Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s. a. hc/1.89 b. 1.89 x h x c c. 1.89/hxc d. (1.51 + 3.4)/hc e. hc/3.45. Calculate the mean, RMS, and most probable speeds for: 1) hydrogen molecule at temperatures of 100 K, 1000 K and 10,000 K and 2) xenon atom at temperatures of l100 K, 1000 K and 10,000 K. Assume the velocity distribution is a Maxwell-Boltzmann distribution for both.