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Tarzan plans to corss a gorge by swinging in an arc form a hanging vine. If his arms are capable of exerting a force of 1400 N on the rope, what is the maximum speed he can tolerate at the lowest p
An unknown compound Y, C10H16, can absorb 2 equivalents of hydrogen gas to give 1-isopropyl-4-methylcyclohexane. The ozonization products are shown below. What is the structure of Y?
An aqueous solution that 2.10 in is slowly added from a buret to an aqueous solution that is 1.40×10-2 in and 0.250 in . When the second ion begins to precipitate, what is the remaining concen
The 7.0N frictional force is applied at a point 40cm from the chair's rotation axis, in the direction that causes the greatest angular acceleration. If that angular acceleration is 1.8rad/s^2, what
Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1).
The following question refers to the following system: 3.5 x 102 mL of 3.2 M Pb(NO3)2 and 2.0 x 102 mL of 0.020 M NaCl are added together. Ksp for the lead chloride is 1.6 x 10-5. Determine the equ
A 1.5g sample of unknown alkali metal carbonate was dissolved in water, and 31.10mL of 0.350M CaCl2 was required to precipitate all the carbonate ions as CaCO3. Give the name and formula of the unkn
A truck travels 1350 m uphill along a road that makes a constant angle of 4.42 degrees with the horizontal. Find the magnitude of the truck's vertical component of displacement, answer in units of m
A student titrates a soln containing 0.254 g of a monoprotic acid in 35 ml of water. the student reaches the endpoint after adding 18.35 ml of 0.107 M NaOH. How many moles of the acid are present i
The majority of cholesterol use in the body is for
The first and second ionization constants of H2CO3 are 4.2×10-7 and 4.8×10-11. Calculate the concentrations of H+ ion, HCO3-, CO32- and undissociated H2CO3 in a 0.080 M H2CO3 solution.
A falling stone takes 0.28 s to travel past a window 2.2 m tall as shown in the figure on the right. From what height above the top of the window did the stone fall?
a compound is determine to contain 4.36g phosphorus and 5.64g oxygen and a molar mass of 284 g/mol. Determine the empirical and molecular formula of this compound.
The polystyrene coffee cup calorimeter is very good insulator.However, it still absorbs a small amount of heat if the system is above room temperature.How does this affect the specific heat of the
What are possible sources of error and their possible effect on the equilibrium constant value in determination of equilibrium constant experiment.
What is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 18 m/s, vertically downward, and (b) 18 m/s, horizontally back tow
A 115 mL sample of a 11.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.40 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.)
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
A certain string just breaks when it is under 400 N of tension. A boy uses this string to whirl a 10-kg stone in a horizontal circle of radius 10 m. The boy continuously increases the speed of the s
Explain how the solution containing equimolar amounts of HCHCO2 and KCHO2 resist change in pH when strong acid is added and also when strong base is added?
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced
Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80
A piston has an external pressure of 13.0 atm. How much work has been done in joules if the cylinder goes from volume of 0.150 liters to 0.570 liters?
Calculate the concentrations of all species in a 1.29 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
The value of Kp for Br2(g)............2Br(g) at 700 K is 2.9e-5.At 500 K value of Kp be higher,lower or the same as that at 700K.Explain ? first predict whether this reaction is endothermic or exot