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Only trace amounts of the synthetic element darmstadtium (atomic number 110) have been obtained. The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose two different reasonable valence electron configurations for this element.
When sodium carbonate reacts with hydrochloric acid, the carbonic acid that is formed immediately breaks down into carbon dioxide and water.
Calculate the molarity of a solution of glycerol made by dissolving 38.000 mL glycerol at 15C(density: 1.2656g/mL) in enough water to make 230.00 mL of solution.
At 0.0oC, if the volume of air is 3.4 mL and the pressure of the atmosphere that day is 695 mmHg, what is the number of moles of air?
which indicator is more accurate phenopthalein or methyl orange? why
How many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}? How many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}?
The pKa values of a compound with two ionizable groups are pKa1 = 4.10 and pKa2 between 7 and 10. A biochemist has 10 mL of a 1.0 M solution of this compoud at a pH of 8.00. She adds 10.0 mL of 1.00 M HCl,
A cube of metal which looks like gold (Au, 19.32 g/cm3) is suspected by a modern Archimedes of being either iron (Fe, 7.90 g/cm3) coated with gold or aluminum
how many grams of potassium permanganate are needed to decolorize 1 gram of 2-pentene in basic solution?
A copper wire (density = 8.96 g/cm3) has a diameter of 0.39 mm. If a sample of this copper wire has a mass of 43 g, how long is the wire?
What is the percent yield if 6.25 g S2Cl2 is isolated from the reaction of 10.0 g S8 and 7.50 g Cl2?
What is the percent dissociation of HNO2 when 0.056 g of sodium nitrite is added to 115.0 mL of a 0.057 M HNO2 solution? Ka for HNO2 is 4.0 × 10-4.
bathed by an atmosphere of nitrogen at 77K and 1 bar? Assume every nitrogen molecule that strikes the surface sticks and that a nitrogen molecule covers an area of 1.1e^5 pm^2.
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