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Lead is a soft, dense metal with a specific heat of 0.028 kcal/(kgC), a melting point of 328.0 Celsius degrees, and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 250.0 kg sample of lead with a temperature of 20.0 Celsius degrees
There are three possible arrangements of atoms and nonbonding pairs of electrons for the AB3N2 geometry. assuming that the effects of the relative strengths of different type of electron repulsions given in the background information
A cylinder contains 975 grams of chloroform, CHCl3, How many atoms of carbon are in the sample? How many atoms of chlorine are in the sample?
For the reaction shown below, Kp = 0.116 at 38.6 °C. Find the equilibrium partial pressures of ALL species if at the start of the reaction PCO = 1.17 atm and PCOBr2 = 1.4 atm
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7)
Show that the balanced equation obeys the law of conservation of mass.
When an ion-selective electrode for X was immersed in 0.0490 M XCl, the measured potential was 0.0470 V. What is the concentration of X when the potential is 0.0620 V?
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
Draw the Lewis structure of nitramide with a single bond between the two nitrogen atoms and include formal charges. Are there any resonance structures? If so, please draw these too. Describe the hybridization of the nitrogen atoms.
Suppose you had standard .1000 M NaOH ,an indicator, such as phenolphthalein, an analytical balance, and a micro-buret available. Explain how you could determine
calculated using the energy level equation. A Li2+ ion emitted a photon with a wavelength of 11.4 nm to reach an energy level with n=1. What was the value of n for its initial energy level?
Benzoic acid was made in a reaction along with product and benzoic acid needs to be removed using extraction. How can this be done. The solvent is CH2Cl2
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C
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