Chemistry, 27.08.2019 12:30 ckenyewildon

In the bohr model of the atom, the ground-state electron in hydrogen has an orbital speed of 2190 km/s. the mass of an electron is 9.11×10−31kg. what is its kinetic energy?

Answers: 1

Show answers

Answers

Answer from: mckinley2006

From the equation:
K.E=1÷2×9.11×10^-31kg×{2190)2
4.555×10^-31kg×4796100
KE=2.184×10^-21g/m/sec2

Answer from: autumnravenaj

The kinetic energy of the electron is 7.58 x 10⁻¹⁹J

From the given question:

The mass of electron = 9.11×10⁻³¹kg Velocity = 2190 km/s = 129 x 10⁴m/s (converted to m/s)

To determine the kinetic energy of the ground, you have to make use of the formula for calculating the kinetic energy, which is:

KE = ½ mv²

Where KE is the Kinetic energy M represent the mass of the body V is the velocity of the body

If you substitute the value, then you have:

0.5 (9.11×10⁻³¹kg) (129 x 10⁴m/s)²

= 7.58 x 10⁻¹⁹J

Thus, the kinetic energy of the electron is 7.58 x 10⁻¹⁹J

Bohr designed a system made up of a dense nucleus and surrounded by electrons held together electrostatic forces of attraction.

Kinetic energy is also known as the energy of motion, which means is the energy an object carries while it’s moving or in motion.

In other words, for an object to have kinetic energy, it must be in motion, such an object must be pulled or push.

This explanation has to do with the Newton's second law of motion. The opposite of kinetic energy is potential energy while its SI unit is Joules (J).

LEARN MORE:

The radius of the orbit is 5.28 × 10−11 m, and the speed of the electron is 2.18 × 106 m/s. The mass of an electron is 9.11 × 10−31 kg In the simple Bohr model of the eighth excited state of the hydrogen atom, the electron travels in a circular orbit around a fixed proton.

KEYWORDS:

ground state electronorbital speedkinetic energylaw of motionpotential energy

Answer from: Quest

Cis the

Answer from: Quest

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

Another question on Chemistry

Chemistry, 22.06.2019 10:10

Stage in which a star’s outer layers have started to cool and grow outward?

Answers: 3

Answer

Chemistry, 22.06.2019 11:40

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Answers: 1

Answer

Chemistry, 22.06.2019 15:00

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Answers: 2

Answer

Chemistry, 22.06.2019 16:30

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

Answers: 3

Answer

You know the right answer?

In the bohr model of the atom, the ground-state electron in hydrogen has an orbital speed of 2190 km...

Questions