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When the lone pair of electrons in SF4 is placed at the equatorial position, which of the following is true? The molecular geometry is trigonal bipyramidal. There are no bonding pairs at 90° angles to each other. The lone pair has 2 bonding pairs at 90° and 2 at 120° angles. There are larger repulsions.
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
Calculate w (in kJ) when 137 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 345 K:
2ZnS + 3O2 = 2ZnO + 2SO2 how many moles of Zno are produces when 32 gms of oxygen is allowed to react with an excess of ZnS?
times that of nitrogen gas ( at the same temperature). calculate the molar mass of the unknown gas in g/mol?
What is the difference in volume (in mL) between the water vapor and liquid water? (Assume the density of liquid water is 1.0 g/mL.) C. Why is it dangerous to heat a closed container of liquid to its boiling point?
Type your question hereA 0.1390-g rock sample of unknown concentration was dissolved in HCl and diluted to 100.0 mL. Aliquots of 10.00 mL of this unknown solution were added to different volumes
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
how much heat energy is required to change 1.00*10^3 of ice at -30.0c to steam at 150c
What is the number of moles of atoms of oxygen contained in 49 grams of sulfuric acid, H2SO4?
With a solution in them connected by a liquid salt bridge junction filled with KNO3. In one solution you have a graphite electrode that is connected with a wire to a copper electrode in the second soution.
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.50 mL Ti solution of unknown concentration with 2.00 mL of a 10.5 micrograms/mL solution of Co
An Ice cube tray holds 325 grams of water. If the water initially has a temperature of 25 C, how many kilojoules of heat must be removed to cool and freeze the water 0 C?
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