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Calculate the percentage error likely to arise in an experiment if 1-mL, 5-mL, and 10-mL are used to transfer and each pipet contains five drops of water adhering to the inside of the barrel.
The cube is quickly added to 100 mL of water at 23oC. What is the final temperature of the mixture? The specific heat of brass is 0.385 J/goC. The density of brass is 8.45 g/cm3.
If a Pb atom is ionized using a photon of ultraviolet radiation having an energy of 1.86E-18 J, what is the amount of leftover energy that goes into the kinetic energy of the ejected electron?
A person swings a 0.521-kg tether ball tied to a 4.60-m rope in an approximately horizontal circle. If the maximum tension the rope can withstand before breaking is 10.2 N, what is the maximum angul
Determine the specific heat of an unknown metal when 25.0 g of the metal, initially at 80.0?C is added to 100.0 mL of water initially at 20.0?C. The final temperature of the mixture is 21.6?C.
Write a balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl.
Assume that you piper twenty milliliters of 0.350M CaCl2 into a fifty milliliter volumetric flask and add DI water to the calibration mark. What is the molarity of this diluted solution?
A 3.4 kg object moving at 5.4 m/s in the positive direction of an x axis has a one-dimensional elastic collision with an object of mass M, initially at rest. After the collision the object of mass M
A student titrates an unknown amount of potassium hydrogen phthalate (KHP) with 47.5 mL of a 0.1000 M NaOH solution. KHP (molar mass = 204.22 g/mol) has one acidic hydrogen.
Explain why covalent bonds are formed when non metals from the right side of the periodic table bond with each other. Give two examples of such compounds.
The following mechanism has been proposed for the reaction of nitric oxide and chloride: What is the molecularity of each reaction?
5 mL of a 0.002M solution of HCl is dissolved in 0.5 Liters of water. What is the concentration of H3O+ ions in the solution?
Using the diffence in electronegativity how can you tell metallic compounds. Is there a range in EN to indicate a metallic compound?
The final temp. of the mixture is 18.2ºC. Calculate the specific heat of the metal, assuming that all the heat lost by the metal is gained by the water.
A solution containing 50 mL of 0.050 M sodium cyanide (NaCN) is titrated with 0.100 M hydrochloric acid (HCl). Cyanide ion is a weak base with Kb = 1.49 × 10-5). (a) Write the net ionic reacti
Calculate the theoretical yield of ethanol based on a 360 ml of a 22% by weight solution of sucrose (density=1.09 g/ml).
How many grams of ethylene glycol, C2H4(OH)2, are needed per kilogram of water to protect radiator fluid against freezing down to -10 degree C?
The isomerization of cyclopropane follows first order kinetics. The rate constant at 700 K is 6.20 × 10-4 min-1, and the half-life at 760 K is 29.0 min. Calculate the activation energy for thi
The decomposition of aqueous hydrogen peroxide to gaseous O2 and water is the first order reaction. If it takes 8.0 h for the concentration of H2O2 to decrease from 0.80 M to 0.40 M. How many hours
When 5.0g of an unknown substance is dissolved in 100.0g of water, the freezing point of the solution decreases by 1.5 degrees celsius. What is the molar mass of the unknown substance if the compoun
On analysis, an equilibrium mixture for the reaction 2H2S(g) 2H2(g) + S2(g) was found to contain 1.0 mol H2S, 4.0 mol H2, and 0.80 mol S2 in a 4.0 L vessel. Calculate the equilibrium constant, Kc, for
If a vessel initially contains a concentration of 9.31E-5 M of formyl radicals, what is the predicted concentration after 8 min have elapsed?
The isomerization of cyclopropane to form propene is a first-order reaction.
A slightly bruised apple will rot four times faster at 20 degrees Celsius than in a refrigerated at 0 degrees Celsius. Compute the activation energy for the rotting process, please show work.
What is the complete ionic equation for the reaction between HC2H3O2 and NH3? It says to use the Hydronium ion (H3O) instead of H+ ion