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The diagram below shows some subatomic particles.
What is the particle that is labeled with a question mark (?) in the diagram?

Answer:

2.05 atm

Explanation:

From ideal gas equation;

PV=nRT

Making P the subject of the formula;

P= nRT/V

Substituting values;

P= 1 × 0.0821 × 294/ 0.5

P= 48.27 atm

Real gas pressure;

(P + an^2/v^2) . (V - nb) = nRT

(P + 1.345 × 1^2/0.5^2) . (0.5 - 1 × 0.03219) = 1 × 0.0821 × 294

(P + 5.38) . (0.46781) = 24.1374

(P + 5.38) = 24.1374/0.46781

(P + 5.38) = 51.5966

P= 51.5966 - 5.38

P= 46.22 atm

Difference = Pideal - Preal

Difference = 48.27 - 46.22

Difference = 2.05 atm

Answer:

neutrons in c,o,b,h

Explanation:

i think so

Answer:

6860

Explanation:

Answer:

C.

Explanation:

Invasive species are the non-native species in a particular area, society or environment causing more havoc than good. Invasive species are introduced into the environment through many means which might be intentional and which might not.

One of the reason behind the presence of invasive species in Georgia is to augment the native specie present in Georgia at that time for instance, one of the invasive species mentioned in the question that is "kudzu" was introduced to the environment in Georgia as specie for controlling erosion.

Although some invasive species were introduced into Georgia by mistake, some invasive species were also introduce because of the need for new Specie in the environment.

Answer:

It's D

Explanation: i just took did it in USATESTPREP.

Explanation:

General Rules. In general, the electropositive character of the oxide's central atom will determne whether the oxide will be acidic or basic. The more electropositive the central atom the more basic the oxide. The more electronegative the central atom, the more acidic the oxide.

Answer: A) Suleman is watching tv program

Answer:

2.cohesion 3.adhesion 4. polar molecule 5. changing states 6. condensation 7.capilary action 8.adhesion 9. changing state 10. evaporation

Answer:

group 2

Explanation:

because they are the only alkalines earth metals on the periodic table

Answer:

b

Explanation:

Answer:

heating point for water - 100°

The melting point (MP) of a substance is the temperature at which it melts. A solid's melting point is a physical characteristic that can be used to identify a substance. Here the correct option is B.

The melting point of a solid is the temperature at which it begins to liquefy. A substance's normal melting point is its melting point under atmospheric pressure. Ice often melts at 0 degrees Celsius.

A physical process called melting or fusing causes a substance to change its phase from a solid to a liquid. This happens when the solid's internal energy rises, usually as a result of heat or pressure being applied, which raises the substance's temperature to the melting point.

Thus the correct option is B.

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Answer:

V = l * w * h

V = 150.00 mm x 1cm/10 mm x 10.00 cm x 0.95 m x 100 cm/1 m = 1.4 x 104 cm3 D = M/V

M = D * V = 19.3 g/cm^3 * 1.4 * 104 cm^3 = 2.7 x 10^5 g = 270000 grams

Answer:

Explanation:

It remains the same!

Answer:

Electrodes are the rods that carry the electric current to and from the electrolyte. These rods are usually inert, as in they do not react- usually graphite or platinum. The positive electrode is called the anode and the negative electrode is called the cathode.

Explanation:

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Electrodes in electrolysis that do not react are called inert electrodes.

Electrodes are conductors which carry current in and out of the electrolyte.

The negative electrode is the anode and the positive electrode is the cathode.

Inert electrodes do not react.

Electrodes in electrolysis that do not react are called inert electrodes.

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Answer:

a. [Ar] 4s2 3d7

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 53.137 g

volume = 7.11 cm³

We have

[tex]density = \frac{53.137}{7.11} \\ = 7.473558368...[/tex]

We have the final answer as

Hope this helps you

Answer:

See explanation

Explanation:

Oxide has a 2- charge.

Copper (I) Oxide = Cu2O

Copper (II) Oxide = CuO

The formula CuO can not be used to represent both copper I oxide and copper II oxide.

The formula of an ionic compound takes into account the oxidation state and valency of the the metal cation which is usually shown as a Roman numeral in the name of the compound.

For the compound copper I oxide, the correct representation of the compound is Cu2O. This shows that oxygen has a valency of 2 while copper has a valency of 1 in the compound.

The correct representation of copper II oxide is CuO. In the compound, both copper and oxygen have valency of 2.

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Answer:

It is true , that the tropical zone experiences the trade winds .

Explanation:

TRADE WINDS -: The trade winds or easterlies are the dominant east-to - west permanent winds that flow in the equatorial area of the Planet (between latitudes 30 ° N and 30 ° S). In the Northern Hemisphere, the trade winds blow primarily from the northeast and from the southeast in the Southern Hemisphere, strengthening throughout the winter and when the Arctic oscillation is in its warm phase. Trade winds have been used by sailing ship captains for centuries to cross the world's oceans and have enabled colonial expansion into the Americas and the construction of trade routes across the Atlantic and Pacific oceans. They act as the steering flow for tropical storms in meteorology. developing over the Atlantic , Pacific, and Southern Indian Oceans and landing in North America, Southeast Asia, Madagascar, and East Africa. Under trade wind regimes, shallow cumulus clouds are seen and are capped from being larger by a trade wind inversion induced by downward air aloft from within the subtropical ridge.

When trade winds blow through tropical areas , due to more direct sunlight , air masses heat up across lower latitudes. Those that develop over (continental) land are drier and hotter than those that develop over (maritime) oceans and travel northward to the subtropical ridge 's western periphery. Masses of maritime tropical air are often referred to as masses of commercial air. There are extensive areas of trade winds in all tropical oceans except the northern Indian Ocean.

Hence , the statement is true.

Answer:

80

Explanation:

W know that, the atomic no of lead (Pb) is 82. The no of protons is equal to the atomic no.

No of protons = 82

It has a charge of +2. It means that its lacks 2 electrons. No of electrons is :

e = 82-2

e = 80

Hence, Pd will have 80 electrons now.

Answer:

transverse and longitudinal

Answer:

Its constructive and destructive

Explanation:

Explanation:

Answer:

₈₈Ra²²⁶  →   ₈₆Rn²²²  + ₂He⁴  + energy

Explanation:

Alpha beta and gamma radiations are the examples of ionizing radiations.

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles having  two proton and two neutrons. It is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number less than 2 as compared to parent atom.

For example:

₈₈Ra²²⁶  →   ₈₆Rn²²²  + ₂He⁴  + energy

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

Another example:

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  + energy

Answer:

Krypton (Kr)

Explanation:

Krypton's melting point is -157.36°c

1. Structure of an atom:-

The basic structure of an atom includes a tiny, relatively massive nucleus, containing at least one proton and usually one or more neutrons.Outside of the nucleus are energy levels (also called shells), which contain one or more electrons.

Properties of an atom:-

The neutrons have the greatest mass and have no charge. The protons have slightly less mass than the neutrons and are positively charged. The electrons have almost no mass and are negatively charged. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons.

2. Elements and their chemical symbols :-

1) Sodium - Na

2) Carbon - C

3) Magnesium - Mg

4) Aluminium - Al

5) Silicon - Si

6) Chlorine - Cl

7) Potassium - K

8) Calcium - Ca

9) Copper - Cu

10) Iron - Fe

3. ionic bond

Covalent bond

Metallic bond

4. pH scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions are measured to have lower pH values than basic or alkaline solutions

5. There are four natural states of matter: Solids, liquids, gases and plasma.

6. Law of conservation of mass :

The 'law of conservation of mass' says that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. The mass of the products in a chemical reaction must equal the mass of the reactants.

Law of conservation of energy :-

According to the law of conservation of energy, energy can only be transformed from one form to another. It can neither be created nor destroyed. The total energy before and after the transformation always remains constant.

Answer:

which one do u want help with?

Explanation:

Answer:

They are all in Group 11.

Explanation:

Look at the periodic table!

The elements gold, silver, sodium, aluminum are all metals. Gold and silver is transition metals. Sodium is in s  block and  aluminum is a p block elements in periodic table.

Metals are electropositive elements able to conduct electricity and because of the presence of a pool of free electrons.

Metallic elements forms ionic bonds with non-metals. Gold and silver are transition metals or d-block elements. They are highly conducting and silver is a common component in electrical devises.

Aluminum is a p-block element it is in 13th group and sodium is a first group element and is called as an alkali metal. Hence, all the given elements are metals.

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Answer:

it is a sacrafice to god so the spirtit can go free

Explanation:

Answer:

I believe it would be a sacrifice or a sacrificial ritual. hope this helped!! <3

Answer:

For a material to be considered as building material, it should have required engineering properties suitable for construction works. These properties of building materials are responsible for its quality and capacity and helps to decide applications of these material. Such properties of building materials are categorized as follows. 1. Physical properties 2. Mechanical properties 3. Chemical properties 4. Electrical properties 5. Magnetic properties 6. Thermal properties

Explanation:

Answer:

1.006 * 103

Explanation:

Add the number between 1 and 9 and add a decimal accordingly . so the answer is 1.006 multiplied by 10 raised to power 3

Answer:

When cosmetics companies use chemicals to make their products, they could dump their waste into rivers and oceans, causing water pollution to occur. The wildlife that lives in these habitats will probably die from them, causing some species to die out and become extinct.

Explanation:

Also, greenhouse gases could be released into the atmosphere, which would cause global warming.

Answer:  microbe Rickettsia prowazekii

Explanation:

Answer:

independent variable: a variable (often denoted by x ) whose variation does not depend on that of another.

dependent variable: a variable (often denoted by y ) whose value depends on that of another.

Explanation:

Answer: Wash your hand Througly

Explanation:The things you handle in a lab can be dangerous and seeing as though it is a common habit to touch your skin and your face the things handled can make you and others sick. Washing your hands after every science lab session is essential to lab and outside lab safety.