CHEMISTRY HIGH SCHOOL

HELP 2. The Kinetic Energy of a particle can be represented by _______________.
(2 Points)
A. mass x speed
B. 1/2 mass x velocity
C. mass x velocity
D. 1/2 mass x velocity squared

Answers

Answer 1
Answer:

Answer:

D

Explanation:

Related Questions

What does the molecular formula of a compound describe?
What is the percent by mass of oxygen in propanal, CH3CH2CHO?(1) 10.0% (3) 38.1%(2) 27.6% (4) 62.1%
Atoms of which types of elements tend to gain electrons? Atoms of which types of elements tend to lose electrons?
What is the mass of an atom that has 3 protons, 4 neutrons, and 3 electrons? 4 6 7 10
Use the born-haber cycle to calculate the lattice energy of kcl. (δhsub for potassium is 89.0 kj/mol, ie1 for potassium is 419 kj/mol, ea1 for chlorine is −349 kj/mol, the bond energy of cl2 is 243 kj/mol, δh∘f for kcl is −436.5 kj/mol .)

A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change.
The velocity of the gas particles decreases.
The kinetic energy of the particles increases.
An exothermic reaction is more likely to occur.

Answers

The correct answer for this question is the statement 'the kinetic energy of the particles increases'. As the temperature of gas goes up, the kinetic energy of the particles increases because their velocities increase. This is because particles get excited and hit each other more - leading to increase in kinetic energy.

Answer: The kinetic energy of the particles increases.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

K=(3RT)/(2)

From above, it is visible that kinetic energy is directly related to the temperature of the system. So, if temperature is increased, average kinetic energy of the system also increases.

Also the velocity of the particles also increase as K.E=(1)/(2)* mv^2.

Given the balanced equation representing a phase change:C6H4Cl2(s) + energy==>C6H4Cl2(g)
Which statement describes this change?
(1) It is endothermic, and entropy decreases.
(2) It is endothermic, and entropy increases.
(3) It is exothermic, and entropy decreases.
(4) It is exothermic, and entropy increases.

Answers

Answer: (2) It is endothermic, and entropy increases.

Explanation: Endothermic reactions are those in which heat is absorbed by the system and exothermic reactions are those in which heat is released by the system.

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

In the given reaction:

C_6H_4Cl_2(s)+energy\rightarrow C_6H_4Cl_2(g)

The energy is absorbed by the reactants and thus it is endothermic and the solid reactants are converting to gaseous products, thus the entropy increases.
The answer is (2). The energy is at left of the equation, so it absorbs energy. It is called endothermic. And the entropy is a measure of disorder. The disorder degree of gas is more than solid. So the entropy increases.

According to the electron-cloud model of the atom, an orbital is a(1) circular path traveled by an electron around the nucleus
(2) spiral path traveled by an electron toward the nucleus
(3) region of the most probable proton location
(4) region of the most probable electron location

Answers

Answer : Option 4) Region of the most probable electron location.


Explanation : As per the electron cloud model of the atom, an orbital is a region where the probability of finding an electron is highest. According to this model which was used to identify the probable location of the electrons when they go around the nucleus of an atom.


This electron cloud model was different from the older Bohr atomic model by Niels Bohr.
According to the electron-cloud model of the atom, an orbital is a "region of the most probable electron location" In this mode, an electron can actually be in two places at once. 

Which of the questions would involve the investigation of kinetic energy?A. What material makes the strongest boat?

B. How does the color of a boat affect heat absorption?

C. Do boats float higher in salt or fresh water?

D. What is the effect of a boat’s shape on its speed?

Answers

Answer:

D. What is the effect of a boat’s shape on its speed?

Explanation:

Kinetic energy can be defined as the energy possessed by an object or body due to its motion. It is the amount of work required to accelerate an object or body with a specific mass from its point of initial rest to a final velocity.

Mathematically, kinetic energy (K.E) is equal to 1/2(mv²).

Hence, the question which would involve the investigation of kinetic energy is "what is the effect of a boat’s shape on its speed?" because speed is directly related to the motion of the boat. Generally, the shape of the hull of a boat has an effect on the speed of the boat.

Answer:

What is the effect of a boat’s shape on its speed?

For example: The solid is not completely submerged in the water. Will this technique error increase, decrease, or have no effect on the reported density of the solid?

Answers

Density is the amount of matter in an object so having it any way submerged in water will not affect the solid's density

A sample of an element is malleable and can conduct electricity. This element could be(1) H (3) S
(2) He (4) Sn

Answers

Answer is: 4) Sn.

Tin (Sn) is only metal in this question and metals are malleable and can conduct electricity.

Metals have metallic bond.

1. Metallic bond is a type of chemical bond.  

2. Metallic bond is formed between electrons and positively charged metal ions.  

3. Metallic radius is defined as one-half of the distance between the two adjacent metal ions.  

4. Metallic bond increace electrical and thermal conductivity.  

5. Metals conduct heat, because when free moving electrons gain energy (heat) they vibrate more quickly and can move around.
The answer is (4) Sn. Malleability and conductivity are properties of metals, and Sn is the only metal of the four.
Other Questions
How does chlorine react with ethene?By substituting hydrogen with chlorine.By breaking a carbon double bond and adding chlorine.By removing hydrogen because of chlorine’s attraction to hydrogen’s nucleus.Chlorine and ethene do not react spontaneously.
What SI unit would best be used to express the height of your classroom ceiling ?
A potassium ion (K+) would most likely bond with?
Which of the following statements is true?Mutations provide organisms with what they "need" to survive.Microevolution is based on fossils, geology, and comparisons to living organisms.Both plants and animals are autotrophs because they can make their own food.Parasites often show cospeciation because they must evolve with ther hosts.