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Iron pyrite (fool's gold, Figure 1.11) has a shiny golden metallic appearance. Crystals are often in the form of perfect cubes. A cube 0.40 cm on each side has a mass of 0.064 g.
(a) Which of these observations are qualitative and which are quantitative?
(b) Which of the observations are extensive and which are intensive?
(c) What is the density of the sample of iron pyrite?
Problem- A quantity of 5*10^-4 mol kg^-1 of trimethylammonium chloride [(CH3)3NHCl] is added to water at 298.15K. Compute the H2O^+ concentration in the solution. Assume complete ionization of the (CH3)3NHCl salt. Kb for (CH3)3N is 6.25*10^-10 at ..
If the volume of a side impact air bag in an auto is 30.5 L, what amount of NaN3 must the bag contain to be fully inflated at 25ºC such that the pressure will not exceed 1.10 atm
Question- Calculate the pH of a 0.20M NH3 / 0.20M NH4Cl buffer after the addition of 30.0 ml of 0.10M HCl to 65.0 ml of the buffer.
Consider the following chemical equation. Na3PO4(aq) + Ca(OH)2(aq) ? Ca3(PO4)2(s) + NaOH(aq) How many grams of calcium hydroxide must react to give 2.69 g of Ca3(PO4)2
Determine q for the acid-base reaction, assuming that the liquids have densities of 1.00 g/mL and the same heat capacities as pure water.
Depict the best possible Lewis structure of methyl cyanide. b) Forecast the geometry and hybridization of each carbon atom. c) Explain the bonding in this molecule in terms of sigma (s) and/or pi (p) bonds and the orbitals
The following compound has two stereoisomers. One has a dipole of 0 D, and the other has a dipole moment of 2.95 D. Draw the structure of the stereoisomer with dipole moment of 0 D.
How many grams of the excess reactant remain after the limiting reactant consumed? 1.05 g of NaHCO3 & 1.05 g of H3C6H5O7 react.
your stomach is a chemical reactor. when you consumea fast food 0.99 hamburger in about a minute it acts like
You are comparing low temperature CVD growth of metal alloys from a variety of metal-organic precursors. In a design-of-experiments exercise to do this, you measure growth rates at various temperatures.
What is the concentration in mol/L of a solution with 8.52g MgCl2 dissolved in 150.0ml of solution. What is the concentration of Mg2+ and Cl- ions.
based on the law of multiple proportions how many grams of hydrogen would you expect 2.49 of nitrogen to combine with
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