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an equeous solution contaning 0.003 M NaCl and 0.005 M CaCl2 is mixed with the polysacharide alingate to creat aahigh- viscosity liquid, calculate the activity coefficient of all ionic species at 25
A sample of gas in a balloon has an initial temperature of 35 degree celsius and a volume of 1120 L. If the temperature changes to 74 degree celsius, and there is no change of pressure or amount of
A tire is filled with air at 15 oC to a gauge pressure of 220 kPa. If the tire reaches a temperature of 38 oC, How much energy do you need to boil off 2 kg block of ice
A bullet is shot vertically up with v0 from ground level. The definition of vertical is by a plumb bob, find the location where the bullet returns to the ground
What are some sources of errors that are associated with standardizing a solution/titration, how can these errors be prevented
A motor develops 0.75 kW of power at 2000 revs per 10 min. What torque is applied to the motor shaft
In standardizing a solution, what would happen if instead of putting HCl solution into a buret and standardized NaOH solution into a beaker when performing a titration
A 1 m diameter wagon wheel consists of a thin rim having a mass of 9 kg, Determine the moment of inertia of the wagon wheel for rotation about its axis
Concentrated acetic acid is 17.5 M; vinegar is 0.87 M acetic acid. How much concentrated acid do you need to make 24 L of vinegar? Use the equation c1V1=c2V2 (where c = concentration and V = volume)
a steel oil pipeline spans a river gorge 100 m wide. the inside wall is electrically heated to reduce the viscosity of the oil to ease pumping, determine the heat lost per day for the pipe in calorie
A 6.30kg block is pushed 9.45m up a smooth 37.0? inclined plane by a horizontal force of 80.0N . If the initial speed of the block is 3.35m/s up the plane. Calculate the initial kinetic energy of th
Concentrated acetic acid is 17.5 M; vinegar is 0.87 M acetic acid. How much concentrated acid do you need to make 24 L of vinegar
A circuit containing a 8 H inductor has an alternating current supplied to it. If Irms is 5.6 A and Vp is 25 V, find the frequency of the signal
Determine the concentration of hemoglobin solution knowing that its absorbance is 0.65. The pathlength is 1 cm and the extinction coefficient is 3.9 x 105 M-1cm-1.
An object is formed by attaching a uniform, thin rod with a mass of mr = 6.92 kg and length L = 4.92 m to a uniform sphere with mass ms = 34.6 kg and radius R = 1.23 m. What is the moment of inertia
When titrating a standardized solution such as NaOH, why is it important to perform each titration multiple times think about why it's important to continue titration past the equivalence point.
The recommended daily dietary intake of calcium for adult men and pre-menopausal women is 1100 mg/day Calcium citrate , Ca3(C6H5O7)2. What mass of calcium citrate would be needed to provide the recom
Two equal charges separated by a distance of 1 meter experience a repulsive force of 1,000 newtons. What is the strength in coulombs on each charge
At 500 K, PCl5 decomposes rather extensively into PCl3 and Cl2. If 1.000 moles of PCl5 is placed in a 1 liter box at 500 K, 13.9 % of it decomposes into PCl3 and Cl2
A dog (mass 11.5 kg) sits on a sled (mass 5.1 kg) that is being pushed with a force of 29 N on a flat snowy surface. what is the coefficient of kinetic friction for the sled sliding on the snow
A 72 kg man is riding on a 40 kg cart traveling at a speed of 2.5 m/s. What is the resulting change in the cart's speed, including sign
Calculate K for 2 NO(g) + O2(g) 2 NO2(g) from the observation that when equilibrium is established at 500 K, there are 0.190 moles NO2, 2.65 X 10-4 moles NO, and 0.606 moles O2 in a volume of 0.759
A length of aluminum wire is connected to a precision 10.0 V power supply, and a current of 0.4258 A is precisely measured at 10.0 degrees celsius, What is the unknown temperature
If an average cup of coffee contains approximately 100 of caffeine, how many moles of caffeine are in one cup
A torque of 11Nm is applied to a heavy wheel whose moment of inertia is 34 kgm2. What is the angular acceleration of the wheel