What is the difference between mass and weight in detail?

Answer:

because it showed how the electron could orbit the nucleus without falling into it.

Answer:

molecular eq.

Cs2SO4  (aq) + BaBr2(aq) → BaSO4(s) + 2CsBr(aq)

ionic eq.

SO₄²-(aq) + Ba^+2 (aq) → BaSO4 (s)

explanation

separate the ions

Cs₂^+1(aq) + SO₄^+2(aq) + Ba^+2(aq) + Br₂^-1(aq) → BaSO₄(s) + 2Cs(aq) + Br(aq)

than simplify it

SO₄²-(aq) + Ba^+2 (aq) → BaSO4 (s)

Answer:

E.6.02

[tex] \times [/tex]

10-23

Answer:

E.6.02 x 10^-23

Explanation:

Answer:

Air-drying clothes conserves more water than using an electric clothes dryer.

Answer:

heat

Explanation:

Answer:

# protones: 22

# neutrones: 26

# electrones: 22

Explanation:

El número atómico del titanio es 22. Este número atómico representa la cantidad de protones del átomo en cuestión. Así:

# protones: 22.

El número másico se define como la suma de protones y neutrones, así:

48 = 22 + # neutrones

26 = # neutrones

Un átomo es neutro, esto quiere decir que sus cargas positivas y negativas son iguales (Protones: cargas positivas; Electrones: Cargas negativas).

Así, el # protones = # electrones = 22

Answer:

Subatomic particles are the proton (1 amu), neutron (1 amu), and electron (0 amu)

Explanation:

Atomic mass unit (amu; dalton): A unit of mass equal to exactly 1/12 the mass of one 12C atom, or 1.660538921 x 10−27 kg. This is the approximate mass of one proton or one neutron. It is the basis of atomic weights.

Answer:

[tex]\boxed{\mathrm{see \: below}}[/tex]

Explanation:

Protons have a mass of 1 amu (atomic mass unit).

Electrons have a mass of [tex]\frac{1}{1840}[/tex] amu (atomic mass unit).

Neutrons have a mass of 1 amu (atomic mass unit).

Answer:

chemical energy

Explanation:

A battery stores energy in the form of chemical energy. Chemical energy is stored in the bond of atoms and molecules. These bonds break and convert to other forms of energy. In the given case, the chemical energy is converted to electric energy which powers the flashlight. Thus, flashlight receives energy input in the form of chemical energy.

Answer:

alkali metals: 1

alkaline earth metals: 2

Halogens: 7

noble gases : 8

Answer:

Alkali Metals: 1 valence electron

Alkaline Earth metals: 2 valence electrons

Halogens: 7 Valence electron

Noble Gases: 8 Valence electrons

Answer:

The particle theory of light was given by Isaac Netwon state that light was made of particles that allow light to undergo reflection and refraction.

The wave theory of light ​was contemporary of the particle theory of light given by Christiaan Huygens. It states that light was a wave that allows light to undergo reflection and refraction when passes through different mediums.

Answer:

Option (A) the solid X is ground to a fine powder.

Explanation:

X(s) + 2B(aq) → X+(aq) + B2(g)

In the reaction above, the rate of the reaction will be highest, when X being a solid is ground to fine powder.

Grounding X to fine powder simply means increasing the surface area of X.

An increase in surface area of reactants will definitely increase the rate of reaction because the particles of the solid will collide with the right orientation and hence speed up the reaction rate.

Your answer is A. What is the composition of air?

The question that can be answered by science is What is the composition of air? The correct option is A.

Science is a subject that deals with the components of the earth. It has a wide variety of components of earth. Like planets and meteorites. Plants, animals, and other creatures. Nature, trees, and other abiotic factors.

Science gives answers to the secrets of the earth, and they unravel the mysteries of nature and the earth. They solve the mysteries of air, water, and other natural processes.

So the composition of air can be told by science. The air is made up of a mixture of gases. Air is present in the atmosphere. It is needed for breathing, and it is an important component of life because it provides oxygen to the body.

The correct option is A. What is the composition of air?

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Answer:

True

Explanation:

The entropy of a system denoted by S is a thermodynamic function that increases in value when there are more ways to arrange the particles in the system. Some spontaneous chemical processes are entropy driven. An increase in entropy is said to drive the dissolution of ionic salts along with the evaporation of water are related to the spreading out of energy.

The entropy of a system can be taken as a measure of disorder of a system. In a spontaneous chemical process, the entropy of the universe is said to increase. ΔSunivu>0. Making the answer true.

Answer:

When dividing the measurements 400 g/32.2 cm³, the answer has  3

significant figures.

Explanation:

400 g/32.2 cm³ = 12.422 g/cm³.

Our answer cannot have more significant figures than the number with the least significant figures. Since both the numerator and denominator have 3 significant figures, our answer will also have 3 significant figures.

So  400 g/32.2 cm³ = 12.4 g/cm³ to 3 significant figures

So, when dividing the measurements 400 g/32.2 cm³, the answer has  3

significant figures.

Answer:

pH is a scale used to specify the acidity or basicity of an aqueous solution. Lower values correspond to solutions which are more acidic in nature, while higher values correspond to solutions which are more basic or alkaline.

Explanation:

Answer: “pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion—which ordinarily ranges between about 1 and 10−14 gram-equivalents per litre—into numbers between 0 and 14.” - my science teacher I don’t know where she gets her notes from

Explanation:

Answer:

Such metals like gold and silver are preferred for making jewelry because they are highly malleable, meaning they can be made into any shape or design without breaking. Also, gold and silver do not leave marks on skin, and silver tends to tarnish (lose its color), but very slowly.

Answer:

Explanation:Pleased to help u....

Answer:

Answer:

Pure crystals of the substance of interest are recovered using crystalization

It can be used to obtain substances that decompose on heating.

Explanation:

Crystalization is the process of converting a liquid solution to a crystalline solid. It is a common method of extracting the solid product of a reaction from solution. It can also be a separation method especially for obtaining pure crystals from a solution.

Crystalization does not require heating. Common methods of inducing crystalization include; addition of crystals of the same substance as seeds or scratching the vessel containing the solution.

The advantage of crystalization over evaporation is that it can be used to recover substance that decompose on heating. Also crystalization yields pure crystals of the substance of interest compared to evaporation in which soluble impurities may not be completely removed.

Answer:

TRUE

Explanation:

Humans and many animals are responsible for air pollution. Even natural processess such as excreting feces results in release of methane, CO2 etc which contribute to air pollution

Humans are not the only animals that pollute the air. This statement is True.

Substance that alters the natural properties of the atmosphere, whether it be chemical, physical, or biological, is considered an air pollutant. Air pollution can occur inside or outdoors. Common causes of air pollution include motor vehicles, industrial operations, household combustion appliances, and forest fires.

Although there are certain natural processes that can produce air pollution, such as sulfur and chlorine gases from volcanic activity, smoke and ash from wildfires, dust storms, and biological degradation, manmade causes account for the majority of pollution in the atmosphere.

Particles that are both solid and liquid, as well as certain gases that are suspended in the air, are what produce air pollution. These gases and particles can be produced by industries, volcanoes, wildfires, dust, pollen, and vehicle and truck emissions.

Thus, Humans are not the only animals that pollute the air. This statement is True.

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Answer:

Byproduct of Nuclear Energy: Nuclear Waste

Explanation:

Nuclear waste has caused plenty of concern over the health of humans and the environment. Since nuclear wastes can last for hundreds of years, it is difficult to find areas where we can store it. Nuclear waste is toxic to humans and the environment, and I believe even some are even radioactive. The byproduct is buried deep underground surrounded by cement and concrete but can still leak through.

Answer:

Cellular respiration:

[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex]

Explanation:

Hello,

In this case, the law of conservation of mass states that matter cannot be created nor destroyed but modified, therefore, typical examples are the raft chemical reactions in nature or carried out in a laboratory. Thus, a typical one that could be daily found is in the cellular respiration wherein glucose and oxygen are converted into carbon dioxide, water and energy for us to use it in our daily activities. It is chemically represented by:

[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex]

Law of conservation of mass is verified as six carbon atoms are before and after the chemical reaction, twelve hydrogen atoms are before and after it and eighteen oxygen atoms as well.

Best regards.

Answer:Oxygen has 6 valence electrons

A=2

B=2

C=4

The charge of an oxygen Ion is -2

Explanation:

According to the electronic configuration,there are 6 valence electrons in an oxygen atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

The answers are B and D.

Explanation:

This is because neutralisation process that contain sodium, potassium and ammonium will produce salt and water.

Answer:H+(protons)..

Explanation:

So,0.3125 * 10 ^3 moles of Sulphur combines with 0.3125 * 10^3 moles of Oxygen to from SO2. Therfore mass ratio of SO2 : SO3 = 10 : 15 = 2:3.

Answer:

The correct option is;

a. HIPAA

Explanation:

The federal law which safeguards Personal Health Information (PHI) is the health Insurance Portability and Accountability (HIPAA) Act of 1996 with rules regarding the security, privacy and transmission (electronically) of medical health data, was passed to improve the ease healthcare movement  between healthcare providers has also added new limitations on PHI disclosure

The HIPAA restricts with whom, when, how and where PHI can be disclosed including physically (direct in person or writing) or electronically (online, over the phone)

Therefore, Jamal had violated HIPAA.

Answer:

We can construct an enthalpy diagram for it:

(please take a look at the picture).

-write the equation, indicate the elements that form the reactants/products. The enthalpy change for formation of elements itself is always 0, so nothing needs to be indicated for O2(g).  

*make sure you multiply the enthalpy with the no. of moles for reactants/products with coefficients more than 1 in the equation.

Clockwise arrows = anti-clockwise arrows.

Therefore, by Hess's law,

ΔHrxn + ΔHf [C2H4(g)] = ΔHf [CO2(g)] + ΔHf [H2O(g)]

ΔHrxn + 52.26 = 2 (-393.509) + 2 ( -241.818)

ΔHrxn = -1,322.91 kJ/mol

Since the enthalpy change is negative, the reaction is exothermic.

Answer:Gases in the atmosphere absorb heat.

Explanation: :) edge2020

Gases in the atmosphere absorb heat is the interaction that contributes to the greenhouse effect.  

• The solar energy captivated at the surface of the Earth is radiated back to the atmosphere in the form of heat. The greenhouse gases absorb the majority of this heat.  

• The greenhouse gases are the complex molecules in comparison to other gases present in the atmosphere, they comprise the composition, which captivates heat.  

• These gases radiate the heat back to the surface of the Earth, to another molecule of greenhouse gas and thus contributing to greenhouse effect.  

• There are many kinds of greenhouse gases, of them the major ones are the carbon dioxide, methane, and nitrous oxide.  

Thus, the statement, that is, gases in the atmosphere absorb heat is correct.

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Answer:

a use of mesurements

Explanation:

Answer:

3.01

[tex] \times [/tex]

10-22

moles=mass/RMM

moles=140/28

=5moles

1mole=6.02*10-23

5moles=?

=3.01*10-22

hope this is helpful