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When 20.0 g of a metal is placed in 9.0 mL of water, the volume increases to 14.5 mL. What is the density of the metal?
NaOH was added. Assuming no volume change, calculate the pH of the solution
2,2-dibromo-3-methylpentane can be prepared by an addition reaction of excess HBr with an alkyne. Draw the structure of the alkyne, name it, and write the reaction
Gold sells for $1120/oz. One ounce is equal to 28.35g. The molar mass of gold is 196.97g/mol. 1 moldovian franc contains 0.567g of gold. If 1 franc = $1.42, how many atoms of gold are presents in 0.010 moldovian francs?
Write the chemical equation for the equilibrium that corresponds to Ka. By using the value of Ka, calculate ?G° for the dissociation of cyanic acid in aqueous solution
calculate the diameter of the ball. The density of water is ?w = 1.000 g/cm3, the density of styrofoam is ?foam = 0.0950 g/cm3 and the acceleration due to gravity is g = 9.81 m/s2.
The bais set for the Fe atom consists of valence 3d, 4s and 4p orbitals. Determine the symmetries of these orbitals under Oh symmetry. (c) Construct an MO diagram for the formation of [FeH6]4- from Fe and the H6- fragment Showing which MOs are occ..
The water level in a graduated cylinder initially at 220 rises to 279 after a piece of lead is submerged. What is the mass in grams of the lead.
A 10 liter sample of oxygen 0.0°C and 15 cm. pressure is subjected to 150 cm. pressure at the same temperature. What is the new volume of the oxygen?
TNT(trinitrotoluene) decomposes exposively What volumes of Hydrogen gas and Nitrogen gas are produced if 5.8 liters of CO is produced ?
A balloon equipped with a UV spectrometer was flown in the stratosphere to measure the [O_3] at an altitude of 25 km. The spectrometer had an absorbtion path length of b= 1000.0 m and measured a transmittance of T = 0.6952. Determine the concentr..
The number of resonance structures (not involving d orbitals) required to correctly describe the bonding in the linear ion Nâˆ'3 is:
A 2.154 g sample of HgO produces 125 mL of oxygen gas. The gas is collected over water at 24 C and an atmospheric pressure of 763 torr.
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