CHEMISTRY HIGH SCHOOL

In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is equal to the(1) activation energy(2) kinetic energy
(3) heat of reaction
(4) rate of reaction

Answers

Answer 1
Answer: 3.heat of reaction 
hope that helped

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The two basic properties of all matter are volumelength and densitymass.

Which laboratory test result can be used to determine if KCl(s) is an electrolyte?(1) pH of KCl(aq)
(2) pH of KCl(s)
(3) electrical conductivity of KCl(aq)
(4) electrical conductivity of KCl(s)

Answers

Answer: (3) electrical conductivity of KCl (aq)

Explanation: pH is the measure of acidity or alkalinity.

Conductance is the ability of a substance to be able to conduct electric current through it. Electrolyte is a solution which enables electric current to pass through them due to the presence of ions.

Ionic compounds do not conduct electricity in solid state as the ions are strongly held by strong coloumbic forces but in aqueous solutions they dissociate into ions and thus act as good conductors.

KCl(aq)\rightarrow K^+(aq)+Cl^-(aq)
The answer is (3) electrical conductivity of KCl(aq). The definition of electrolyte is that the substance that will ionize when dissolving in suitable ionizing solvent like water.

What volume of silver metal will weigh exactly 10 kg. The density of silver is 10.5g/cm^3

Answers

Answer:

V=952.380952381 cm3cap V equals 952.380952381

Which of the following is the correct molecular shape of NH3?А) bent
B) linear
C) tetrahedral
D) trigonal pyramidal

Answers

A bent


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What type of charge does an neutron

Answers

Neutrons don't have a charge. they're neutral.
protons= positive
electrons= negative

Here I will give you all the charges and the names:

Neutrons: Neutral, it means no charge at all 
Protons: Positive
Electrons: Negative

What occurs when an atom loses an electron?(1) The atom’s radius decreases and the atom becomes a negative ion.
(2) The atom’s radius decreases and the atom becomes a positive ion.
(3) The atom’s radius increases and the atom becomes a negative ion.
(4) The atom’s radius increases and the atom becomes a positive ion.

Answers

When an atom loses an electron, it becomes a positive ion and the radius of the atom decreases. The correct answer is option 2.

An atom is the basic unit of matter that consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons.

  • The valence shell determines the size of the atom, and when an electron is removed from this shell, the size of the atom decreases. The loss of an electron from an atom creates a positively charged ion, called a cation.
  • The cation has a smaller radius than the neutral atom because the positive charge on the cation attracts the remaining electrons more strongly, pulling them closer to the nucleus.

Therefore, option 2. The atom’s radius decreases, and the atom becomes a positive ion is the correct answer.

Learn more about atom here:

brainly.com/question/1566330

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Answer:

When an atom loses an electron, the atom's radius decreases and the atom becomes a positive ion.

What is a major element found in our bones

Answers

Answer:

Phosphorus

Phosphorus, found in the nucleus of every cell in the body (including white blood cells), nucleic acids, high-energy compounds,
Other Questions
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2. A magnifying glass is an example of a _______ lens.A. converging B. double-concave C. plano-convex D. plano-concave Student Answer: C Answer: Incorrect Reference: 3. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _______ the object. A. real, inverted, and smaller than B. virtual, upright, and larger than C. virtual, upright, and smaller than D. real, inverted, and larger than Student Answer: A Answer: Incorrect Reference: 4. Which of the following values represents an index of refraction of an actual material? A. .25 B. 0 C. .5 D. 1.25 Student Answer: C Answer: Incorrect Reference: 5. Which, if any, of these mirrors can produce a real image? A. Plane B. Convex spherical C. No mirrors can produce a real image. D. Concave spherical Student Answer: A Answer: Incorrect Reference: 6. When white light is incident on a prism, which one of the resulting color components will have the lowest index of refraction? A. Yellow B. Blue C. Green D. Orange Student Answer: C Answer: Incorrect Reference: 12. Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps? A. Fluorescent lamps operate at a higher temperature than incandescent lamps. B. Fluorescent lamps are more efficient than incandescent lamps. C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps. D. Fluorescent lamps produce light with less glare than incandescent lamps. Student Answer: B Answer: Incorrect Reference: 15. Which of the following is not a characteristic of electromagnetic waves? A. They can travel through a vacuum. B. They can be refracted. C. They can be reflected. D. They can travel at various speeds through any one material. Student Answer: B Answer: Incorrect Reference: 16. A ray at which angle would produce the most glare? A. 37 degrees B. 70 degrees C. 25 degrees D. 59 degrees Student Answer: B Answer: Incorrect Reference: 18. Which of the following statements is true of glare control? A. Using bulbs that aren't frosted will help to diffuse the light and reduce glare. B. Special care must be taken to prevent glare where a low illuminance is required. C. Redirecting lamp fixtures and adjusting bulb types will do little to control glare. D. Indirect lighting is preferred to direct lighting because it produces less glare. Student Answer: C Answer: Incorrect Reference: 19. Which of the following objects uses two converging lenses to produce two images, the second of which is virtual, magnified, and inverted? A. Slide projector B. Compound microscope C. Corrective eyeglasses D. Camera Student Answer: D Answer: Incorrect Reference: 20. The light intensity of a source is 100 candelas. The illuminance on a surface is 4 lux. How far is the surface from the source? A. 4 meters B. 6 meters C. 5 meters D. 7 meters Student Answer: B Answer: Incorrect
Different elements are most likely to react in similar ways when they