# Yoyo

### concept of first ionization energy!!!!!?

Which of these reactions illustrate the concept of first ionization energy?

X (g) —> X(+) (g) + e-X(-) (g) —> X (g) + e-X(g) + e- —> X(-) (g)X(+) (g) + e- —> X (g)

Chemistry3 days ago### CHEMISTRY NEED HELP?

1 AnswerChemistry1 month ago### A 100.0 L gas chamber at STP contains equal volumes of the first four noble gases, He, Ne, Ar and Kr.?

If an additional 100.0 L of N2 (nitrogen gas), also at STP is pumped into the gas chamber, what will be the effect on the partial pressure of helium?

It will increase.It will decrease.It will remain the same.It cannot be determined.What is the total pressure of the final mixture of the gases?

1 AnswerChemistry1 month ago### At 298K and 1.0atm, the density of a gaseous hydrocarbon is 1.07g/L. Which of the following is most likely the formula of the hydrocarbon?

a.CH4 (MW = 16 g/mol)

b.C2H2 (MW = 26 g/mol)

c.C2H4 (MW = 28 g/mol)

d.C2H6 (MW = 30 g/mol)

1 AnswerChemistry1 month ago### CHEM EQUATIONS?

Ammonium nitrate (NH4NO3) , commonly used in agricultural fertilizers is a highly explosive compound. When it explodes, it forms N2 (g), O2 (g), and H2O . When 40 grams of NH4NO3 explode, 14 g of nitrogen and 8 grams of oxygen are formed. How many grams of water are formed?

1 AnswerChemistry1 month ago### CHEM - This is a trick question tbh?

The King of Greece wanted to fashion a crown for his son, the prince who was once bequeathed some gold from a vassal in Minos. Once the crown was made, he thought that it was lighter than what the crown should appear to be. Not wanting to be deceived by blacksmiths and artificers, he consulted Archimedes to solve his problem. As an apprentice of Archimedes, you determined that the mass of the crown was 475 grams and that the volume (by water displacement) yielded 27.8 cm^3. Would you consider that crown to be made of pure gold or a fake? What would you report to Archimedes and the King? (The density of gold is 19.3 g/cm^3) Explain your answer (5 points)

2 AnswersHomework Help1 month ago### MOMENTUM A golf ball is released from rest from a height of 0.811 m above the ground and has a collision with the ground?

A golf ball is released from rest from a height of 0.811 m above the ground and has a collision with the ground, for which the coefficient of restitution is 0.601. What is the maximum height reached by this ball as it bounces back up after this collision?

2 AnswersPhysics2 months ago### MOMENTUM A golf ball is released from rest from a height of 0.811 m above the ground and has a collision with the ground?

A golf ball is released from rest from a height of 0.811 m above the ground and has a collision with the ground, for which the coefficient of restitution is 0.601. What is the maximum height reached by this ball as it bounces back up after this collision?

2 AnswersPhysics2 months ago### Conservation of Momentum?

A hockey puck with mass 0.170 kg traveling along the blue line (a blue-colored straight line on the ice in a hockey rink) at 1.50 m/s strikes a stationary puck with the same mass. The first puck exits the collision in a direction that is 30.0° away from the blue line at a speed of 0.750 m/s (see the figure). What is the direction and magnitude of the velocity of the second puck after the collision? Is this an elastic collision?

2 AnswersPhysics2 months ago### What is the speed of the first bumper car after the collision? Assume that the collision takes place in one dimension.?

Two bumper cars moving on a frictionless surface collide elastically. The first bumper car is moving to the right with a speed of 20.4 m/s and rear-ends the second bumper car, which is also moving to the right but with a speed of 9.00 m/s. What is the speed of the first bumper car after the collision? The mass of the first bumper car is 188 kg, and the mass of the second bumper car is 143 kg. Assume that the collision takes place in one dimension.

3 AnswersPhysics2 months ago### A penny is sitting on the edge of an old phonograph disk that is spinning at 33.0 rpm and has a diameter of 12.0 inches.?

A penny is sitting on the edge of an old phonograph disk that is spinning at 33.0 rpm and has a diameter of 12.0 inches. What is the minimum coefficient of static friction between the penny and the surface of the disk to ensure that the penny doesn’t fly off?

1 AnswerPhysics2 months ago### UNIVERSAL CIRCLES MOTION CIRCULAR?

A ball of mass m = 0.200 kg is attached to a (massless) string of length L = 1.00 m and is undergoing circular motion in the horizontal plane, as shown in the figure. a) Draw a free-body diagram for the ball. b) Which force plays the role of the centripetal force? c) What should the speed of the mass be for to be 45.0°? d) What is the tension in the string?

1 AnswerPhysics2 months ago### UNIVERSAL CIRCULAR MOTION ISSO HARD THANKS?

A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is <delta> = 1.20. If the radius of the curve is 10.0 m, what is the maximum speed at which the car can turn without sliding? Assume that the car is undergoing uniform circular motion.

1 AnswerPhysics2 months ago### IM CONFUSED UNIVERSAL CIRCULAR MOTION?

Calculate the centripetal force exerted on a vehicle of mass m = 1500. kg that is moving at a speed of 15.0 m/s around a curve of radius R = 400. m. Which force plays the role of the centripetal force in this case?

1 AnswerPhysics2 months ago