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how many mM of nitrogen atoms in 1g/L of (NH4)2SO4. molecular mass of (NH4)2SO4 is 132.14g/mol
On a banked race track, the smallest circular path on which cars can move has a radius of 106 m, compute the largest speed at which cars can move on this track without relying on friction
A 1.07 g sample of sulfur was burned in a bomb calorimeter whose calorimeter constant is 2.03 kcal/°C. If the resulting temperature change was 1.17 °C, what is the molar heat of combustion f
A particle leaves the origin with an initial velocity v(bold)=2.4m/s xhat, How far does the particle move in the x direction before it turns around
The final temperature of the system is 27.3°C. The resulting 0.500 M NaCl (aq) has a density of 1.02 g/ml, and a specific heat of 4.02 J/g-deg. What is the value of ?H in kJ/mole or the reaction
Students in a fraternity house want to be able to spray water 25 m across their neighbor's yard onto a patio. What size nozzle do they need
How to do I calculate the pH of original buffer given mass of NaC2H3O2*H2O (FW =136 g/mol) = 3.507 g
An electron with an initial speed of 4.90×105m/s is brought to rest by an electric field. What was the potential difference that stopped the electron
a spring has a constant k=8.75 N/m. if the spring is displaced 8.150 m from its equilibrium position, what is the force that the spring exerts
Consider a sample of diatomic ideal gas which is taken through the following cycle: A constant pressure process that doubles the volume of the gas, What is the efficiency of this cycle
Suppose an astronaut has landed on Mars. Fully equipped, the astronaut has a mass of 125 kg, What is the acceleration due to gravity on Mars
What is the force of gravity between two 1000-kg cars separated by a distance of 25m on a interstate
A horizontal force of 250 N is applied to a stationary wooden box in one direction, What additional force is needed for the box to remain stationary
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point as, compute the magnitude of the charge on each sphere
In this section assume the temperature is 20unless directed otherwise. A submarine 79 deep emits a sonar (sound) wave. How deep is the ocean at that point
The drawing shows three different resistors in two different circuits. The battery has a voltage of V = 27 V, and the resistors have resistances of R1 = 50.0 ?, R2 = 25.0 ? and R3 = 10.0 ?. What is
A 73 long metal string under 35.5 tension has a linear mass density 2.20×10?4, Find the frequencies of the first three harmonics
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
A solution consisting of 100 mL of the weak base 1.0 M NH3 is titrated with 1.0 M HCl. Which of the following is false. At the equivalence point, the solution is acidic.
Water returns to the atmosphere through which process and ask a question about the atmosphere, hydrosphere, air-sea interaction
What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses Take the gravitational constant to be = 6.67×10?11 .
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
During 8.83 seconds a motorcyclist changes his velocity from v1,x = -36.5 m/s and v1,y = 10.5 m/s to v2,x =-23.1 m/s, Find the components of the motorcycle\'s average acceleration
During a strenuous workout an athlete generates 2050.0 kJ of heat energy. What mass of water would have to evaporate from the athletes skin to dissipate this much heat
A speedboat moves on a lake with initial velocity vector v1,x = 9.61 m/s and v1,y = -2.71 m/s, Find the speedboats final speed