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In excellence for teaching Think about Jacobs' (2010) ideas about school structures. How do her ideas suggest possibilities for creating new forms that could be more productive for teaching and learning in your school setting with your students.
What mass of carbon dioxide was produced? Express your answer to three significant figures and include the appropriate units.
Draw Lewis structures of the four molecules and/or ions with the formulas given below and figure out which two of these are isoelectronic with each another.
Assuming complete dissociation of the solute, how many grams of KNO_3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and K_f is equal to 1.86 C/m
Chlorine dioxide is used for bleaching wood pulp. At a particular temperature, 35% of the molecules have a speed greater than 400 m/s. If the sample is heated slightly, what happens to the % of molecules with a speed greater than 400 m/s
Within this analogy, discuss how the shielding by core electrons is analogous to putting a frosted-glass lampshade between the lightbulb and your eyes, as shown in the illustration.
Write balanced, net ionic equations when the following compounds are mixed. Indicated mixtures where no reaction is expected with the notation "no rxn".
A gas follows the equation of state PV = nRT(1+aP) where 'a' is a constant. For this gas, show that a = 1/T and K = 1/(P(1+aP) and verify that (dP/dT)v = a/K
A diatomic gas does 315 J of work and also absorbs 580 cal of heat. What is the change in internal energy of the gas?
For the reaction: 2 B5H9(l) + 12 O2(g) ? 5 B2O3(s) + 9 H2O(l) , ?Hrxn = -9.04 kJ. If 3.00 moles of B5H9 react, how much heat is released
Nitric acid is gernerated by the action of sulfuric acid on sodium nitrate. Nitrous acid is prepared by the action of hydrochloric acid on sodium nitrite. Why is nitrous acid prepared in situ rather than obtained from the reagent self.
Caffeine has a distribution of 4.6 between water and dichloromethane. Calculate how much caffeine (I used 0.5283g of caffeine) is extracted per each 6ml dichloromethane extraction.
an experiment requires 43.0 of ethylene glycol a liquid whose density is 1.114 . rather than weigh the sample on a
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