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A 130g piece of metal is heated to 286C and dropped into 87.0g of water at 26C, if the final temperature of the water is 58.3C, what is the specific heat of the metal (J/gC).
the feed to reactor contains only ethylene and hydrogen bromide. if the molar flow rate is 165mol/s, calculate the fractional conversion of the limiting reactant?
What is the density of gallium in grams per cubic centimeter at 25 if a 1.00 cube has a mass of 0.2133 ?
How does the addition of Fe(NO3)3 affect the concentration of FeSCN ion? What effect does the addition of Fe(NO3)3 solution have on the concentration of FeSCN?
Identify the spectator ion(s) in the following equation: HCl(aq) + Li2CO3(aq) → LiHCO3(aq) + LiCl(aq)
A potter's wheel having a radius 0.55 m and a moment of inertia 13.3 kg·m2 is rotating freely at 50 rev/min. The potter can stop the wheel in 4.5 s by pressing a wet rag against the rim and e
Dr. Brown has a radioisotope source containing 1.2 x 106 (also written as 1.2E+06) atoms of Plutonium-238 in 1985, how many atoms will remain in 352 years?
How many grams of cisplatin are formed from 54.4g of K2PtCl4 and 36.4g of NH3 if the reaction takes place in 95% yield based on the limiting reactant?
A football player runs the pattern given in the drawing by the three displacement vectors , , and . The magnitudes of these vectors are A = 5 m, B = 20.0 m, and C = 25.0 m. Using the component metho
If the temperature changed from 25.2 °C to 30.3 °C, calculate the molar heat of combustion of methane in J/mol.
A 28-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 180 J from 440 J. How high does she rise during this
what volume of carbon dioxide at 22 degrees celsius and 781 mmHg could be absorbed by 327 grams of LiOH?
What minimum mass of succimer (C4H6O4S2) (in mg) is needed to bind all of the lead in a patient's bloodstream? Assume that patient blood lead levels are 25 micrograms/deciliter.
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A horizontal pipe contains water at a pressure of 124 kPa flowing with a speed of 2.4 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when t
Some electric-power companies use water to store energy. Water is pumped by reversible turbine pumps from a low to a high reservoir.
The ions are evenly distributed throughout the ocean water. Which term or terms could be used to describe this sample of ocean water?
A galvanic cell consists of an Ag electrode in a 1.0 M AgNO3 solution and a Ni electrode in a 1.0 M Ni(NO3)2 solution. Calculate the standard emf of this electrochemical cell at 25ºC. (Use Tab
What is valance bond theory & why it is needed in presence of VSPR theory although VSPR theory had alresdy explained the structures?
A baseball is hit with a speed of 28.0 at an angle of 41.0. It lands on the flat roof of a 12.0 -tall nearby building. If the ball was hit when it was 1.5 above the ground, what horizontal distance
During a breath, the average human lung expands by about 0.50 (L). If this expansion occurs against an external pressure of 1.0 atm, how much work in J}) is done during the expansion?
Calculate OH- of each aqueous solution using the following H3o+. Calculate the oh- of each aqueous solution with the following H30+.
A horizontal pipe contains water at a pressure of 118 kPa flowing with a speed of 1.8 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when
how many mL of a 0.157M solution of KOH is required to react with 0.385g of CH3COOH according to following equation: