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Consider the chemical species IF5 + IF4+. Draw the Lewis Structure and make a rough three-dimensional sketch of each species.
Suppose a 5 liter sample of oxygen gas at a given temperature and pressure contains 1.08x10^23 molecules. how many molecules would be contained in each of the following at the same temperature and p
If 0.85 t of sodium carbonate is actually produced from 1.0 t of sodium chloride, what's the theoretical yield percentage
A 4.40 g piece of solid CO2( dry ice) is allowed to vaporize(change to gas) in a ballon. The final volume of balloon is 1.00 L at 300L. What is the pressure of the gas?
How many kcals of heat energy would be required to vaporize 35 grams of H2O that demonstrated a temp. of 246 K?
Calculate how many moles of NH3 form when each quantity of reactant completely reacts.
A 1.0 ounce piece of chocolate contains 15 {rm mg} of caffeine, and a 6.0 ounce cup of regular coffee contains 105 {rm mg} of caffeine. How much chocolate would you have to consume to get as much c
When 28.0 ml of 0.500 M H2SO4 is added to 28.0 ml of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the delta H of this re
When a particular marble is dropped into a beaker of water, it sinks to the bottom. Which is the best explanation? A. The surface area of the marble is not large enough to be held up by the surface
A mixture of 82.49 g of aluminum ( Picture = 26.98 g/mol) and 117.65 g of oxygen ( Picture = 32.00 g/mol) is allowed to react. What mass of aluminum oxide ( Picture = 101.96 g/mol) can be formed?
What is the percent of Sulfate in 22.04 grams of Barium Sulfate?
how many moles of ethylene glycol should be added to the radiator to lower the freezing point of the water from 0 degrees celcius to -18 degrees celcius?
A gas has a volume of 534 mL at 25 degrees Celsius and under a pressure of 73.0 cmHg. Correct the volume to standard conditions. Which gas law would you use?
Obtain from your classmates, the molar enthalpies of neutralization of hydrochloric acid, sulfuric acid, and phosphoric acid when each reacts with sodium hydroxide. Write a chemical equation for ea
The activation energy for a particular reaction is 95 kJ/mol. By what factor will the rate constant increase when the temperature is increased from 50 oC to 62 oC?
Three solutions are mixed together to form a single solution. Write the next ionic equations for the precipitation reaction or reactions that occur.
Write net ionic equations for the following molecular equations. HBr is a strong electrolyte. (Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients.)
If 19.0 mL of 0.800 M~rm HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
A 32.65-g sample of a solid is placed in a flask. Liquid toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 50.00 ml. The solid
When cyclopentane is exposed to Br2 in the presence of light, reaction occurs. Write the formulas of all possible monobromination products. Draw molecule by placing atoms on grid.
A metal objet with a mass of 19 g is heated to 96 degree celcieus, then tranfered to a clorimeter containing 75 g of water at 18 degree celcieus. The water and metal objet reach a final temperature
Calculate the work that a person of mass 65kg must do to climb betweencalculate the work that a person of mass 65kg must do to climb between two floors of a building seperated by 4.0m.
Equal volumes of water (density 1.00g/mL) and ethyl alcohol (density 0.789g/mL) are combined. If the total volume is 190% of volume of each component, what is the density of the solution?
What is the percent yield of a reaction in which 212 g phosphorus trichloride reacts with excess water to form 137 g HCl and aqueous phosphorus acid (H3PO3)?
A gold bar weighing 33.5g and having an initial temperature of 25.0 degrees Celsius, absorbs 5,000 joules of heat. What would be its new temperature?