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Determine the moles of NaOH b. Determine the moles of HCl c. Calculate the concentration of HCl
A simple pendulum 2.0m in length, is released with a push when the support string at an angle of 25 degrees from the vertical. What is the speed at the bottom of the swing
In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.70{\rm m/s} relative to the ground. What is the magnitude of the ball's velocity relative to Juan
Describe the ideas behind direct comparison and standard addition methods in the analysis of ICP-OES
A capacitance of is connected to an alternating emf of frequency 100 cycles/second. What is the capacitive reactance
A swimmer dived off a cliff with a running horizontal leap. What must his minimum speed be just as he leaves the top of the cliff
You want to create an electric field at location. where would you place an electron to produce this filed at the origin
a light spring whose unstretched length is 2.0 cm. You're going to use this spring to measure charge. First, you attach one end of the spring to the ceiling, What is the charge on the ball
What precautions must one take in using internal standard method for analysis of samples in complex matrices
If a particle that had a charge q=6 micro C and mass 0.2 grams that moves in an uniform external electric and also magnetic fields that are E= ( 2Î +3? +9?) N/C, what is the magnitude of the p
Lasers are used extensively in eye surgery to remove unwanted "material" from the eye or reshape the eye's lens. What is the power during one of these pulses
A sample in a 1.0 mm cell absorbs 75.0% of the incident light at 510 nm. If the solution is 0.075 M, its molar absorptivity (M-1 cm-1) is:
Find a vector equation for the line through the points A and B and find general equations for the line from - Find a vector equation for the plane through the points C, D and E
Calculate the wavelengths of the following objects? c)a 83Kg athlete running exactly a 4 minute mile d)earth (mass=5.8x10^27g) moving through space at 2.8x10^4m/s
A cat walks along a plank (length = 4.00 m and mass = 7.00 kg). What is the mass of the cat
3- A 498mL sample of laughing gas, N2O, is at 30 *C and 414 torr pressure (a) How many gas molecules are present. (b) How many atoms are there
A cubical box .2 m on a side is completely immersed in a fluid. The pressure at the top of the box is 105 kPA, What is the denstiy of the fluid
Given that the Ka for hypochlorous acid is 3.0x10^-8 determine the number of moles of sodium hypochlorite needed to prepare this solution.
Calculate the cell potential for the following reaction as written at 69 °C, given that [Mg2 ] = 0.876 M and [Fe2 ] = 0.0160 M. Standard reduction potentials can be found here.
Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
Carbon monoxide gas burns in oxygen to form carbon dioxide gas. Write a balanced equation for the reaction and determine the volume of oxygen needed to react completely with 561 mL of CO at 40.0°
Calculate the formate ion concentration and pH of a solution thatis 0.050M in formic acid (HCHO2; Ka=1.8*10^-4) and 0.10M inHNO3
What is the total force on the bottom of a swimming pool (20m by 10m), if the pool has an average depth of 1.50 m
If your titration solution is 0.431 M in NaOH, and the endpoint occurs at 13.20 mL of titrant, how many mmol of NaOH are required to reach the endpoint
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 degg above the horizontal. Over the entire trip the work done by the air forces is