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Prove that <V> = 2 <E> and, consequently, that <K>=-<E> for a 2s electron. This relationship turns out to be true for many-electron atoms and molecules, and is a special cas
The HCL concentration in a hyperactidic stomach is 0.03 M. The volume of the liquid in the stomach is 300mL. How many tablets of the antacid (neutralization capacity of 0.008325 mol HCl neutralized
How many mmols of H2PO4- were present in the sample? Please help me solve this question. The answer is 0.18 mmols.
A sample of hydrogen gas intially at 88 degrees Celsius and 9.60 L is cooled until its final volume is 3.40L. What is its final temperature in degrees Celsius.
Two point charges are on the y axis--one, of magnitude 3.0 multiplied by 10-9 C, at the origin and a second, of magnitude 6.0 multiplied by 10-9 C, at the point y = 10 cm. Calculate the potential a
A 6 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.8 m/s2, find the force exerted by the rope on the bucket of water.
A hydrocarbon is commonly used as an anesthetic. If a 2.50-L flask contains 5.11 g of the hydrocarbon gas at 679 torr and 25 °C, what is the molecular formula of the hydrocarbon?
A simple supported beamis hinged at point p. find the tension in the tie rope and component of the force exerted by the hinge on the beam.
Why is it important to know and classify various chemical reactions? Please give examples of at least 3 different chemical reactions that you encounter in your daily life.
Acetic acid CH3COOH, has an acid dissociation constant of 1.8 x 10-5. What is the conjugate base of acetic acid and what is its base dissociation constant?
A 5 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3 m/s2, find the force exerted by the rope on the bucket of water.
A block of mass 3.00 kg is pushed up against a wall by a force P that makes a 56.0° angle with the horizontal as shown in the figure below. The coefficient of static friction between the block a
The Ni2+ extracted from the column was treated with 25 mL of 0.04446 M EDTA. How many milliliters of 0.02119 M Zn2+ is required for the back titration of the Ni2+ solution?
What concentration do you need to dilute this stock to, so that you have a final concentration of 5nM reagent in 1mL of cells.
An artillery shell is fired with an initial velocity of 300 m/s at 57.5° above the horizontal. To clear an avalanche, it explodes on a mountainside 38.5 s after firing. What are the x and y comp
The water level in the CO2 collection cylinder is higher than the water level outside the cylinder. Is the wet CO2 gas pressure greater or less than atmospheric pressure?
What is the rms speed of nitrogen molecules contained in an 6.9 m3 volume at 2.0 atm if the total amount of nitrogen is 1000 mol?
An electric motor rotating a workshop grinding wheel at a rate of 96 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
Three 1.2 kg masses are located at the vertices of an equilateral triangle 88 rm cm on a side, connected by rods of negligible mass. Find the rotational inertia of this object (a) about an axis thro
An Olympic skier moving at 20 m/s down a 30o slope encounters a region of wet snow and slides 145 m before coming to a stop. What is the coefficient of friction between the skis and the snow if the
What is the volume occupied by 28.2g of argon gas at a pressure of 1.06atm and a temperature of 360K ?
Two trains heading toward each other on the same track are initially separated by 1000 km. One train is heading east at 20 m/s and the other is heading west at 30 m/s. When and where will the trains
A desktop computer is to be cooled by a fan whose flow rate is 0.34 m3/min. i) Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3.
Two boxes (m2 is higher up the ramp than m1) m1=1.0kg with a coefficient of knietic friction of 1.0, and m2= 2.okg with a coefficient of kinetic friction of 2.0 are placed on a plane of 30 degrees.
Find the work she does on the flight bag. Find the work done by the force of friction on the flight bag. Find the coefficient of kinetic friction between the flight bag and the floor.