True/False. A program is an algorithm that has been coded into something that can be run by a machine. *

Answer:the first one

Explanation:

Answer:

Ribosomes are found in both cells

Answer:

This should be correct "The biggest advantage of sexual reproduction versus asexual reproduction is genetic diversity. When a single organism reproduces asexually it produces an exact copy of the parent organism."

Explanation:

sorry that I'm late but brainliest ....... please...................., maybe............... ?????

Answer: False

Explanation:

Answer: 57 neutrons

Explanation: Ruthenium has an atomic number of 44, meaning it has 44 electrons, 44 protons, and 57 neutrons.

Answer:

57 neutrons

Explanation:

Ruthenium has atomic number of 44, that is, it contains 44 electrons distributed in atomic orbitals and its nucleus has 44 protons and 57 neutrons (Figure 1). Electron distribution in atomic or molecular orbitals is called electron configuration which for Ru and the other group 8 chemical elements is shown in Table 1.

a.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

The atom that loses the valence electron is called the electron donor while the atom that accepts the electron is called the electron acceptor.

Ionic bond usually occurs between metals and non metals.

Ionic bond is a bond in which there is complete transfer of valence electrons between atoms.

b.

The force of attraction between Na⁺ and Cl⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

c.

The force of attraction between Mg²⁺ and O²⁻ forms the ionic bond.

Since the atoms are now charged, the force of attraction between them forms the ionic bond.

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An ionic or electrovalant bond is a type of chemical bond, which is formed  from two ions (charged atoms by loosing or gaining electrons) having opposite charges.

Ionic bonds are formed from the transfer of electrons from one atom to another. As the electrons are transferred there occurs a positively charged ions (cations) and a negatively charged ions (anions). These ions are held together in a crystal lattice structure by the strong electrostatic attraction between the positively charged cations and negatively charged anions.

The electrons are transferred as the atoms have tendencies to achieve a stable electronic configuration. They do this to attain a stable atomic structure. By transferring the electrons they attain their octet or duplet.

Sodium chloride(NaCl) is formed when the atom of sodium combines chemically with chlorine atom to generate an ionic compound.

Since sodium has an atomic number of 11, its electronic configuration is 2, 8, 1. There is only one electron in the outermost shell of a sodium atom. Therefore, the sodium atom gives one electron to produce the sodium ion Na⁺.

Chlorine has an atomic number of 17. Hence, its electronic configuration is 2, 8, and 7. The chlorine atom contains seven electrons in its outermost shell and requires one more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a chlorine atom accepts one electron and creates the negatively charged chloride ion (Cl⁻).

When sodium interacts with chlorine, it donates its outermost electron to the chlorine atom, forming a sodium ion (Na⁺) and a chloride ion (Cl⁻) by accepting an electron. The strong electrostatic force of attraction between the newly created ions, holds sodium and chloride ions together to create sodium chloride, Na⁺Cl⁻ or NaCl.

Similarly in the case of Magnesium Oxide (MgO) is formed from the chemical interactions of Magnesium and oxygen atoms, leading to the formation of an ionic compound.

Since magnesium has an atomic number of 12, its electrical configuration is 2, 8 and 2, there is just 2 electrons in the outermost shell of a Magnesium atom. Therefore, the magnesium atom gives two electron to produce the Magnesium ion Mg²+ .

Oxygen has an atomic number of 8. Hence, its electronic configuration is 2 and 6, the oxygen atom contains 6 electrons in its outermost shell and requires 2 more electron to create the inert gas’s stable, eight-electron configuration. Consequently, a oxygen atom accepts 2 electronelectrons and creates the negatively charged oxide ion (O²-).

When magnesium interacts with oxygen, it donates its outermost electrons to the oxygen atom, generating a Magnesium ion Mg²+ .  And an oxygen ion (O²⁻) by acquiring 2 electrons. The attractive electrical force holds magnesium and oxygen   ions together to create sodium chloride,        Mg²⁺ O²⁻ or MgO.

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Between steps 2 and 3, the chemical energy in the coal is converted to heat energy. So, the correct option is D.

The bonds of chemical compounds which contain a type of potential energy known as chemical energy. It is the energy that is given out or absorbed during a nuclear rearrangement or chemical reaction.

Chemical energy is a form of potential energy, which can be released and converted into different types of energy such as heat, light or electrical energy. Some examples of chemical energy include power stored in batteries, as well as fuels such as coal, oil and gas, and food. The chemical energy in the coal is converted to thermal energy in the given above example between steps 2 and 3.

Therefore, the correct option is D.

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Answer: It's usually used to remove water from aqueous solutions (dilute liquids).

Explanation: I hope this helps.

When an ethereal solution of benzophenone is added to the phenyl Grignard reagent, it forms a new compound called diphenylmethanol.

When a wet ethereal solution of benzophenone is added, the reaction may not proceed smoothly as water can hydrolyze the Grignard reagent and it from reacting with benzophenone. When an ethereal solution of benzophenone is added from an addition funnel that was rinsed with acetone, it ensures that there are no impurities that may interfere with the reaction and lead to side products.

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Answer:

3.8857037037g per cm3

Explanation:

52.357g/13.5 cm3 = 3.8857037037

Round if needed

Explanation:

(1) they are heterogenous mixture

(2) the size of particles of colloids is too small to be seen by bare eyes.

(3) they scatter light passing through them making it's path visible.

5.1g of iron is needed to prepare 11.86 g of the iron chloride product if, under the conditions of the reaction, the electron configuration of the iron cation in the product is 1s22s22p63s23p63d6

Define electronic configuration.

The distribution of electrons in an element's atomic orbitals is described by the element's electron configuration. Atomic electron configurations adhere to a standard nomenclature in which all atomic subshells that contain electrons are arranged in a sequence with the number of electrons they each hold expressed in superscript.

Only ferrous chloride (FeCl2) is produced when metallic iron is treated with hydrochloric acid. The other product released is hydrogen gas. Ferric chloride (FeCl3) is created when iron is heated in the presence of chlorine gas.

Fe + Cl2 → FeCl2

1 mole iron reacts to give 1 mole FeCl2

No. of moles of Fe and FeCl2 are 1.

55g of Fe produces 126g of FeCl2

So 11.86g of FeCl2 is formed from 55*11.86/126 i.e. 5.1g

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Answer:

a pure substance

Explanation:

i hope i help if i didnt im srry:(

The ionic equation for dissolution and the solubility product (ksp) expression for each of the following slightly soluble ionic compounds.

(a) For PbCl2:
Dissolution: PbCl2 (s) → Pb²⁺ (aq) + 2Cl⁻ (aq)
Ionic equation: PbCl2 (s) ⇌ Pb²⁺ (aq) + 2Cl⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Pb²⁺][Cl⁻]²

(b) For Ag2S:
Dissolution: Ag2S (s) → 2Ag⁺ (aq) + S²⁻ (aq)
Ionic equation: Ag2S (s) ⇌ 2Ag⁺ (aq) + S²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Ag⁺]²[S²⁻]

(c) For Sr3(PO4)2:
Dissolution: Sr3(PO4)2 (s) → 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Ionic equation: Sr3(PO4)2 (s) ⇌ 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺]³[PO₄³⁻]²

(d) For SrSO4:
Dissolution: SrSO4 (s) → Sr²⁺ (aq) + SO₄²⁻ (aq)
Ionic equation: SrSO4 (s) ⇌ Sr²⁺ (aq) + SO₄²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺][SO₄²⁻]

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Answer:

eachother or different type of flower

Explanation:

Length x width x height can define the volume of an object.

Volume can be defined as the space which is occupied by an object in space. It is also called the capacity of the object. The volume of an object also refers to the amount of space it fills. Very large Volumes can be measured in cubic meters (m3) while the other hand, while the Smaller volumes can be measured in cubic centimeters (cm3) as well as cubic millimeters (mm3). Volume has three dimensions i.e. length, width, and height whereas area has two dimensions i.e. length and width. We can calculate the volume of an object with the help of a formula i.e. Volume = length × width × height.

So we can conclude that volume of an object can be calculated with the help of the formula i.e. Volume = length × width × height.

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Gases consist of a large number of particles moving in random directions with varying velocities, so the kinetic energy of the gas as a whole cannot be determined.

The kinetic energy of a single particle in a gas can be expressed as 1/2 mv^2, where m is the mass of the particle and v is its velocity. The kinetic energy of the gas as a whole cannot be determined by simply adding up the kinetic energy of all the individual particles. However, Instead, the behavior of gases is better described by the average kinetic energy of the particles, which is related to the temperature of the gas through the ideal gas law. Therefore, the kinetic energy of a single particle is not very useful for the analysis of gases.

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Answer:

the main cause of climate change is burning fossil fuels such as oil, gas, and coal. When burnt, fossil fuels release carbon dioxide into the air, causing the planet to heat up.

Explanation:

The pH scale is a way to measure the acidity or basicity of a solution. pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration, [H+], in moles per liter.

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Answer:

42%

Explanation:

Answer:

the answer must have to be A

Answer:

A.

Explanation:

This is the closest to what Ptolemy drew.

B would have the sun and moon in equal orbits, but the moon changes wouldn't be accounted for

C and D have the sun in the middle, so they are both heliocentric.

The diagram that correctly shows the orbits of the Sun, Earth, and Moon in the geocentric model of the solar system is A and the correct option is option A.

In the geocentric model of the solar system, the Earth is considered to be the center of the solar system.

The Moon, the planets, the Sun, and the stars all rotate around the Earth (which stays still), with uniform circular motion. They compose the heavens, which are considered to be ethereal and unchanging.

Therefore, the diagram that correctly shows the orbits of the Sun, Earth, and Moon in the geocentric model of the solar system is A and the correct option is option A.

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By using the ideal gas law to get volume we have"

Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K

We must first convert mass to moles:

By substituting this value into the ideal gas law we have:

1.9502e-6L of H2 gas reacted at STP

When performing research, you should never believe everything a source says without checking it against another source of information.

Even very trustworthy sources can occasionally contain information that is inaccurate or biased. A good way to corroborate the information is checking it against another source. If several sources agree on the information, it is likely that this is trustworthy.

Accuracy is the nearness of observed values or measured values to the true value. The difference between the measured and observed value gives the error incurred during the experimental procedure.

Therefore, When performing research, you should never believe everything a source says without checking it against another source of information.

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Answer:

d

Explanation:

i did this b4

Answer:

The fourth answer choice.

Explanation:

This is the correct answer because dropping it, carrying it, won't to anything to change the physical state of the matter (the bowl).

Hope this helps! :)

Factors such as the lack of arable land and the scarcity of water make agriculture less productive in India.

India has a large area of degraded and infertile land, which limits the ability of farmers to produce crops. Soil degradation is caused by factors such as deforestation, overgrazing, and soil erosion.

India is facing an increasingly serious water shortage, which affects agriculture in many regions. Lack of access to water for irrigation is a major limiting factor for crop production.

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Answer:

24 hours

Explanation:

You can safely leave peeled potatoes in the refrigerator for 24 hours. It's a great way to get a head start on your holiday meal preparation. As the Idaho Potato Commission notes, you can keep both whole, peeled potatoes or cut potatoes in the refrigerator.

Answer:

A

Explanation:

Determine the mass number for each of the isotopes, which is obtained by adding the number of protons and the number of neutrons. Hence, isotope A has a mass number of 1, isotope B has a mass number of 2, and isotope C has a mass number of 3. To determine the average atomic mass, we multiply the atomic mass of each isotope by its abundance. Hence, we obtain (0.99985 × 1 amu) + (0.00015 × 2 amu) + (0.00 × 3 amu) = 1.00 amu

Answer:

helium and neon are both noble gases their outermost shells are full or stable the elements will agree with the statement s above