CHEMISTRY HIGH SCHOOL

Which of the following explains why hot liquids have a greater average energy of motion than cold liquids? *Hot liquids have more electrons
Cold liquids have more electrons.
Particles in hot liquids move faster than particles in cold liquids
Particles in cold liquids move faster than particles in hot liquids.

Answers

Answer 1
Answer:

Particles in hot liquids move faster than particles in cold liquids. The faster a particle moves, the greater its kinetic energy.

The number of electrons in a particle has nothing to do with its kinetic energy.

Particles in cold liquids move more slowly than particles in hot liquids.

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When a nonmetal bonds with a nonmetal, they form a(n) _______________

Which of the following would be used to measure the amount of matter in an object?Weight

Density

Mass

Gravity

Answers

the answer is Weight

Which statement describes a chemical property of the element magnesium?(1) Magnesium is malleable.
(2) Magnesium conducts electricity.
(3) Magnesium reacts with an acid.
(4) Magnesium has a high boiling point.

Answers

Answer: option 3) magnesioum reacts with an acid.


Justification:


1) Malleability, conduction of electricity, and boiling point are physical properties.


2) Maleability is the ability to be transformed into foil. It is just a change in form. So, it is a physical property.


3) The metals conduct electricity in virtue of the array of the atoms, which permtis the flow of the electrons, but it does not involve a chemical change, so it remains being a physical proerty.


4) Boling point is the temperature at which a substance passes from liquid state to gas state, which are just different forms of the same substance. So, it is other physical property.


5) Reaction with an acid is indeed a chemical transformation: the metal (magnessium) will form a chemical bond with some spieces of the acid to form a new compound. This is a chemical reaction in virtue of the chemcial properties of the substance (its ability to react with acids)

Magnesium reacts with an acid.

In polar coordinates, the origin is called the _____.

Answers

In polar coordinates, the origin is called the pole. Polar coordinate system is actually a two dimensional coordinate system. In this type of system the reference point is known by the name of pole. I hope that this is the answer that you were looking for and the answer has come to your desired help.

Answer:

In polar coordinates, the origin is called the pole.

Explanation:

The position of a point in a polar coordinate system is defined by using the distance from a fixed point and an angle made with a fixed ray from that point. It is a two-dimensional coordinate system.

The polar coordinates is defined as

P(r,\theta)

Where, r is radius and θ is the angle with the polar axis, i.e. positive axis.

In a coordinate system (0,0) is called origin.

In polar coordinate system (0,0) is called pole.

Therefore, in polar coordinates, the origin is called the pole.

A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher’s head?

Answers

The ball will be subject to potential and kinetic energy at this point in time as it is still rising away from the ground and not yet subject to the pull of gravitational force. The potential energy will account for the forces occurring due to change in relative position of the ball during its flight while kinetic energy will account for the energy derived by its motion.

Answser: as the ball is ascending, its kinetic energy decreases and the gravitational potential energy decreases. When the ball is at the maximum altitude, the gravitational potential energy is maximum and the kinetic energy is minimum. As the ball is descending, it loses gravitational potential energy and gains kinetic energy. The total mechanical energy is conserved.

Explanation:

Remember, gravitational potential energy is due do the position (altitude) and the kinetic energy is due to motion (speed).

Mathematically they are:

Gravitational potential energy = mass × gravitaional acceleration × altitude

Kinetic energy = mass × speed² / 2.

Total mechanical energy = gravitational potential energy + kinetic energy.

The ball starts with a very low gravitational potential energy (low altitude) and high kinetic energy (high speed), as the travels upward and far away from the hitter, the kinetic energy is transferred to gravitational potential energy, so the ball gains altitude and loses speed.

When the ball reaches the maximum altitude, it has lost all the vertical speed, and the kinetic energy is at a minimum level, while its gravitational potential energy is at the maximum.

From that point, the ball starts to descend, losing grativational potential energy and gaining kinetic energy. At the moment that the ball reaches the ground it will be again at the minimum grativational potential energy and maximum kinetic energy.

What are the properties of an ionic bond?

Answers

Answer:

Ionic Compounds have high boiling and melting points as they're very strong and require a lot of energy to break. The electrostatic forces of attraction between oppositely charged ions lead to the formation of ions. Ionic compounds form crystals. These compounds are brittle and break into small pieces easily.

Explanation:

A similarity between the forces involved in both ionic and covalent bondingis that bothO A) involve the sharing of electrons.O B) involve the transfer of electrons.O C) involve the attraction of opposite charges.requre same amountof energy toereakther bonds

Answers

Stating the difference between covalent and ionic bonding....

ionic bonds consist of the transfer of electrons, and covalent consists of the sharing of electrons.

This being said..answer choices A and B are out of the picture.

Thus, answer choice C is your answer.

Involve the attraction of opposite charges;require same amount of energy to break their bonds.
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