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Calculate to the correct number of significant figures the grams of potassum iodide that are present in 899.46 mL of an aqueous solution which is known to contain 17.960 g of potassum iodide per 100.00 mL of solution.
What would the atom ratio of 206-Pb to238-U be in a uranium mineral from a rock that is 1.0× 10^9 years old? t1/2(238-U)= 4.5 × 10^9 yr.
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
You mix 55 mL of 1.00M silver nitrate with 25 mL of 0.81 M sodium chloride. What mass of silver chloride should you form?
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24 0C
The Ka of a monoprotic weak acid is 7.76 × 10-3. What is the percent ionization of a 0.127 M solution of this acid?
For the decomposition of ammonia on a tungsten surface at 1100 oC 2 NH3 N2 + 3 H2 the average rate of disappearance of NH3 over the time period from t = 0 s to t = 1417 s is found to be 3.40E-6 M s-1. The average rate of formation of N2 over the s..
Draw the crystal field splitting diagram for octahedral Zn^2+ and Ca^2+ complexes. Predict the color of aqueous solutions of Zn^2+ sals and Ca^2+ salts. Does it matter if the complexes are high-spin or low-spin?
What is the major role of a greenhouse gas that contributes to temperature rise of the Earth's surface? 1 Stops both incoming sunlight and outgoing infrared radiation
the ionization of water must be considered in order to calculate the pH of this acidic solution.)
How much ice in grams would have to melt to lower the temperature of 51.0 g of water from 65.0*C to 0*C
A manufacturer claims that their new candy bar contains fewer than 40 Calories per serving. As a technician in an independent laboratory, you use a bomb calorimeter with a specific heat capacity of 7.35J/gC.
a solution consisting of isobutyl bromide and isobutyl chloride is found to have a refractive index of 1.3931 at 20 degrees celsius. The refractive indices at 20 degrees celsius of isobutyl bromide and isobutyl chloride
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