CHEMISTRY HIGH SCHOOL

Give examples of how low and high levels of radiation can each be helpful.

Answers

Answer 1
Answer: Visible light
Microwaves
Low frequency waves
Radio waves
Remote controls
Cordless phones
And so on!
Hope this is helpfull! :D
~Korey

Related Questions

Which list of phases of H2O is arranged in order of increasing entropy
Fe2O3 + H2 --> Fe + H2OA) what mass of hydrogen gas must be consumed to produe 10.0 g of iron metal?B) what mass of iron(lll) oxide, Fe2O3, must be consumed to prepare 2.50g of iron metal
How are isotopes defined
What is the mass of 6.3 moles of Sulfur
A compound is broken down by chemical means during (1) chromatography (2) distillation (3) electrolysis (4) filtration

Which property determines an atom's ability to attract electrons shared in a chemical bond?

Answers

Electronegativty is what determines how an atom would bond and its need to form a stable octet. 

FILL IN THE BLANK. HELPPPP!Weak bases react with _______ to form the hydroxide ion and the conjugate _______ of the base. Concentration in solution does not affect whether an acid or a base is _______ or weak.
The strength of an acid or a base is determined by the _______ of the substance in solution.

The acid dissociation constant, _______, is a quantitative measure of acid strength. A strong acid has a much _______ Ka than a weak acid. The Ka of an acid is determined from measured _______ values.
Hydrochloric acid and sulfuric acid are _______ ionized in solution and are _______ acids. Ethanoic acid, which is only about 1 percent ionized, is a _______ acid. Magnesium hydroxide and calcium hydroxide are strong _______.

Answers

Answer :The corrected answer is given below;


Weak bases react with water to form the hydroxide ion and the conjugate acidof the base. Concentration in solution does not affect whether an acid or a base is strong or weak.

The strength of an acid or a base is determined by the dissociation constant of the substance in solution.

The acid dissociation constant, Ka, is a quantitative measure of acid strength. A strong acid has a much higher Ka than a weak acid. The Ka of an acid is determined from measured titration values.


Hydrochloric acid and sulfuric acid are completely ionized in solution and are strong acids. Ethanoic acid, which is only about 1 percent ionized, is a weak acid. Magnesium hydroxide and calcium hydroxide are strong base.

Answer:

water

acid

strong

dissociation constant

Ka

higher

titration

completely

Strong

weak

base

Explanation:

Weak bases react with water to form the hydroxide ion and the conjugate acid of the base. Concentration in solution does not affect whether an acid or a base is strong or weak.

The strength of an acid or a base is determined by the dissociation constant (ka /Kb) of the substance in solution.

The acid dissociation constant, Ka, is a quantitative measure of acid strength. A strong acid has a much higher Ka than a weak acid. The Ka of an acid is determined from measured titration values.

Hydrochloric acid and sulfuric acid are completely ionized in solution and are strong acids. Ethanoic acid, which is only about 1 percent ionized, is a weak acid. Magnesium hydroxide and calcium hydroxide are strong base.

Over-encouraging lesser skilled players can lead to embarrassment.
a. True
b. False

Answers

Answer: Option (a) is correct.

Explanation:

A person with less skills needs to work more or practice more on his abilities in order to improve their athletic ability to build a stronger team.

Over encouragement to lesser skilled person can lead to the development of over confidence. As after over encouragement, the less skilled person can have the illusion of knowing each and everything which is not true for anyone.

As no one is perfect, therefore, over-encouraging lesser skilled players can lead to embarrassment.
My answer would be a. True

A transmutation reaction must always involve a(n) ____.a. change in the number of electrons in the atom
b. decrease in the number of neutrons in the nucleus of an atom
c. increase in the number of neutrons in the nucleus of an atom
d. change in the number of protons in a nucleus of an atom

Answers

A transmutation reaction must always involve a change in the number of protons in a nucleus of an atom. A transmutation reaction involves a change in the structure of atomic nuclei and hence may be induced by a nuclear reaction. The correct answer is letter "D." I hope this helps. 

Answer: Option (d) is the correct answer.

Explanation:

Transmutation is a process which brings changes in the nucleus occur because of change in the number of protons of an atom. Therefore, the atom  formed will have different properties from its parent atom.

For example, ^(27)_(13)Al + ^(4)_(2)He \rightarrow ^(30)_(15)P + ^(1)_(0)n

A transmutation can be natural or artificial in nature.

Thus, we can conclude that a transmutation reaction must always involve a change in the number of protons in a nucleus of an atom.

Which of these following have a positive charges

Answers

Talking about ions, a cation has a positive charge. That means a positive charge is gained by an atom that gives out electrons. 

Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pressure conditions?

Answers

\boxed{{\text{Charles's law}}} states that volume occupied by a fixed quantity of a gas is directly proportional to the absolute temperature (Kelvin) at constant pressure.

Further Explanation:

Charles’s law:

Charles’s work showed that at constant pressure, the volume-temperature relationship for a fixed amount of gas is linear. In other words, Charles’s law can be stated that at constant pressure, the volume occupied by a fixed amount of a gas is directly proportional to its absolute temperature (Kelvin). This relationship is known as Charles’s law.

The mathematical representation of Charles’s law is,

{\mathbf{V}} \propto {\mathbf{T}}                   [P and n are constant]

Where,

  • V is volume occupied by the fixed quantity of gas.
  • T is the temperature of a gas.
  • P is the pressure of a gas.
  • n denotes the number of moles of gas.

The relationship can also be expressed as,

\frac{{\mathbf{V}}}{{\mathbf{T}}}{\mathbf{ = constant}}                                    [P and n are constant]

Or,

\frac{{{{\mathbf{V}}_{\mathbf{1}}}}}{{{{\mathbf{T}}_{\mathbf{1}}}}}{\mathbf{ = }}\frac{{{{\mathbf{V}}_{\mathbf{2}}}}}{{{{\mathbf{T}}_{\mathbf{2}}}}}                      [P and n are constant]

Results of Charles’s law are as follows:

  • At constant pressure, if the volume of gas increases then the temperature also increases.
  • At constant pressure, if the volume of gas decreases then the temperature also decreases.

The volume (L) versus temperature (T) curve of Charles’s law is represented in the attached diagram.

Learn more:

1. Law of conservation of matter states: brainly.com/question/2190120

2. Calculation of volume of gas: brainly.com/question/3636135

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Ideal gas of equation

Keywords: Charles’s law, volume, temperature, pressure, volume temperature relationship, absolute temperature, constant pressure, relationship, V directly proportional to T, ideal gas, ideal gas equation number of moles, moles.

Charles's Law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pressure conditions

Further explanation

There are several gas equations in various processes:

  • 1. The general ideal gas equation

PV = nRT

PV = NkT

N = number of gas particles

n = number of moles

R = gas constant (8,31.10 ^ 3 J / kmole K

k = Boltzmann constant (1,38.10 ^ -23)

n = = N / No

n = m / M

n = mole

No = Avogadro number (6.02.10 ^ 23)

m = mass

M = relative molecular mass

  • 2. Avogadro's hypothesis

In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules

So it applies: the ratio of gas volume will be equal to the ratio of gas moles

V1: V2 = n1: n2

2. Boyle's Law

At a fixed temperature, the gas volume is inversely proportional to the pressure applied

p1.V1 = p2.V2

  • 3. Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

V1 / T1 = V2 / T2

  • 4. Gay Lussac's Law

When the gas is heated in a tube whose volume does not change, the gas pressure in the tube is proportional to its absolute temperature

P1 / T1 = P2 / T2

  • 5. Law of Boyle-Gay-Lussac

Combined with Boyle's law and Gay Lussac's law

P1.V1 / T1 = P2.V2 / T2

P1 = initial gas pressure (N / m2 or Pa)

V1 = initial gas volume (m3)

P2 = gas end pressure

V2 = the final volume of gas

T1 = initial gas temperature (K)

T2 = gas end temperature

So the correct answer is Charles' Law, where at constant pressure, the volume of gas will be inversely proportional to its temperature

Learn more

Identify all of the gas law equations that relate to the ideal gas law

brainly.com/question/4147359

the ideal gas law

brainly.com/question/3637553

equation agrees with the ideal gas law

brainly.com/question/1056445
Other Questions
Entropy measures _____.a. disorder b. energy c. heat transferred d. force
Why is the radius of a positive ion always less than the radius of its neutral atom? (A) the nucleus pulls the remaining electrons in closer.(B) The number of principal energy levels is always reduced. (C) The atomic orbitals contract all by themselves (D) Electron speeds are reduced
A solution contains 72.0 g of HCl and 468 g of (C6H6). What is the mole fraction of benzene
What is the total number of protons in the nucleus of an atom of potassium-42?