Plastic, rocks, rabbits and steel are all made of matter. Matter is made up of tiny particles called ________.
Question 1 options:

a nucleus

atoms

energy

molecules

Answer:

its help us

equation- ( a)2+(b)2+2an

The average temperature is 17.0 °C.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature.

Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the Fahrenheit scale (°F), and the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the International System of Units' (SI) seven base units is the kelvin law of cosines.

The lowest point on the thermodynamic temperature scale is absolute zero, or zero kelvin, or 273.15 °C.

To find the average temperature, we add up the individual temperatures and divide by the total number of measurements. Let's calculate:

Average temperature = (16.9 + 17.0 + 17.1) / 3 = 51.0 / 3 = 17.0

Therefore, the average temperature is 17.0 °C.

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The silicate tetrahedron is the primary building block of the silicates. The correct answer is B.

The silicate tetrahedron, a pyramid-shaped unit with one Si at its center surrounded by four oxygen atoms, is the fundamental unit of the silicate structure. To create the various silicate minerals, these tetrahedra join together and combine with other elements like Fe, Al, Ca, etc.

A silicate tetrahedron (SiO₄⁴⁻), a four-sided pyramid containing silicon in the centre, is formed when silicon and oxygen form a covalent link. Numerous significant minerals in the crust and mantle are composed of this structure as their building block.

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The value chain model classifies all company activities as either primary or support.

The given statement is true.

The value chain model refers to the sequence of activities necessary for a company to deliver a valuable product or service to its customers. It categorizes all of the company's activities into two categories: primary and support.Primary activities are those that are directly involved in creating a product or service, such as inbound logistics, operations, outbound logistics, marketing and sales, and service. Support activities are those that provide assistance to primary activities, such as procurement, technology development, human resource management, and infrastructure.

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The diagrams show the arrangements of carbon atoms in diamond and in graphite. The hybridization in diamond is  sp³  and have tetrahedral shape while in graphite hybridization is sp²  and is hexagonal ring shaped structure.

Diamond containing carbon atoms are strongly bonded chemically with other four carbons. The  hybridization in diamond is  sp³ and make perfect tetrahedral shape. Diamond used in jewelry making. they are used by surgeons in the cataract surgery. diamond is hard, used for cutting or drilling rock.

Graphite containing carbon atom are form the weak bond with weak forces.  in graphite hybridization the carbon atom is sp² and make a hexagonal ring shape structure. The forces in the graphite allotropes present are weak that makes it useful material.  it is used as lubricant. it is used in pencil. used in making electrodes.

Thus, The diagrams show the arrangements of carbon atoms in diamond and in graphite. The hybridization in diamond is  sp³  and have tetrahedral shape while in graphite hybridization is sp²  and make its shape as  hexagonal structure.

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Answer: The chemical or iupac name of rust is iron oxide. However, I have also heard people say it is Ferric Oxide. That is because "ferric" is the scientific name for iron.

A change in momentum from applying a force for a certain time is called an impulse.

In physics, the word momentum can be defined as a type of measurement that indicates mass motion, which is generally denoted by the letter p and can be used to understand the impulse properties of a given compound and or material.

Therefore, with this data, we can see that in physics the word momentum is used to understand the motion of the mass and thus determine the kinetic properties of an element.

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The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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Answer:

27 moles of H₂

Explanation:

Equation of reaction:

N₂ + 3H₂ → 2NH₃

From the equation of reaction,

3 moles of H₂ is required to produce 2 moles of NH₃

3 moles H₂ = 2 moles of NH₃

X moles of H₂ = 18 moles of NH₃

X = (3 * 18) / 2

X = 27 moles of H₂

27 moles of H₂ is required to produce 18 moles of NH₃

Answer: There is a single covalent bond in a chlorine molecule.

Explanation: The chlorine molecule is represented as Cl−Cl, i.e. C

l2. Between the chlorine atoms, 2 electrons overlap to form a region of high electron density to which the positively charged chlorine nuclei are attracted, such that internuclear repulsion is negated and a net attractive force results. Because the bonding electrons are shared between the nuclei, we conceive that each atom has 8 valence electrons.

Of course, on reaction with sodium, the sodium reduces the chlorine molecule to give 2×Cl−. The resultant bond between Na+ and Cl−is ionic and a non-molecular substance results.

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The percentage decrease in the amount of dissolved oxygen is 10%

Percent yield is the percent ratio of actual yield to the theoretical yield. It is calculated to be the experimental yield divided by theoretical yield multiplied by 100%. If the actual and theoretical yield ​are the same, the percent yield is 100%

In chemistry, yield is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

From the graph,

The amount of dissolved oxygen at  15°C is 10 mg/L

The amount of dissolved oxygen at  20°C is 9 mg/L

The decrease in the amount of dissolved oxygen is 1mg/L

The percentage decrease = (1/10) × 100 = 10%

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Dominant

Explanation:

Meaning that particular gene is stronger than the others.

Answer:

Explanation:

hope it helps

plzz mark as brainliest..

A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.

When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.

The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.

In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.

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Landslides are natural geological processes that can occur in hilly areas due to various factors such as slope steepness, geological composition, weather conditions, vegetation cover, and human activities.

While landslides are more common in hilly or mountainous regions, it is not accurate to categorize them as inevitable.

Although hilly areas are generally more prone to landslides due to their topography, it is possible to mitigate and manage landslide risks through appropriate measures. These measures include proper land-use planning, slope stabilization techniques, drainage systems, vegetation management, and early warning systems. By implementing these preventive and protective measures, the occurrence and impacts of landslides can be reduced or mitigated.

It is essential to prioritize safety and adopt proactive approaches to minimize the risks associated with landslides in hilly areas. This involves conducting thorough geological surveys, monitoring slope stability, implementing appropriate engineering solutions, and raising awareness among local communities about the potential hazards and ways to respond to them.

In conclusion, while landslides can occur in hilly areas, they are not inevitable. With proper planning, effective mitigation strategies, and proactive measures, the risks associated with landslides can be significantly reduced, ensuring the safety and well-being of communities living in hilly regions.

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The unstable type of hemoglobin that cannot bind with oxygen is called Methemoglobin.

What is Hemoglobin?

Hemoglobin (Hb) is an oxygen-carrying protein present in the erythrocytes (red blood cells) that gives the cells their characteristic red color.

The primary function of hemoglobin is to transport oxygen (O2) from the lungs to the cells of the body's tissues and organs and carry carbon dioxide (CO2) back to the lungs to be exhaled.

There are several types of hemoglobin, which include fetal hemoglobin (HbF), adult hemoglobin (HbA), and abnormal hemoglobin.

The types of hemoglobin are based on their subunit composition and their oxygen binding properties.

Abnormal hemoglobin is hemoglobin with a change in its amino acid sequence, which changes its structural and functional properties.

The various types of abnormal hemoglobin include sickle cell hemoglobin (HbS), hemoglobin C (HbC), hemoglobin E (HbE), and met-hemoglobin (MetHb).

Methemoglobin is an unstable form of hemoglobin caused by a defect in the oxygen-binding site of the heme iron. Methemoglobin cannot bind to oxygen as effectively as normal hemoglobin.

Therefore, it cannot release oxygen to the body's tissues and organs, leading to tissue hypoxia (oxygen deprivation). This condition is called Methemoglobinemia.

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The final product will be CH3-CH2-C≡C-CH2CH3. ( Hex-3-yne)

The reaction between CH3-CH2-C≡C:–Na+ and CH3CH2Br is a nucleophilic substitution reaction. The sodium acetylide will act as a nucleophile and attack the electrophilic carbon of the CH3CH2Br molecule. This will result in the formation of a new carbon-carbon bond and the displacement of the bromine atom.

. In this reaction, the negatively charged carbon in the acetylide ion acts as a nucleophile and attacks the electrophilic carbon in ethyl bromide, resulting in the formation of a new carbon-carbon bond. The bromide ion is then released as a leaving group.

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Answer:

chemical energy is the energy of a chemical substance that is stored in the bonds of chemical compounds and is released when they undergo a chemical reaction and transform into another substance

For this problem, we could use the ideal gas equation:

Where P is the pressure, V is the volume, R is a constant and T is the temperature.

Before we start solving, we should remember the units:

P [atm]

V [L]

The ignition occurs when a mixture of fuel & oxygen encounter an external heat source with sufficient heat Piloted ignition.

When a volatile fuel is close to a nearby local energy source (pilot) and reaches its lower limit of flammability in air, piloted ignition may be possible. The flame that originates in the premixed system spreads outward from the pilot. The first law of thermodynamics for systems with fixed mass only describes the energetics of this process.

The science of thermodynamics examines how heat, work, temperature, and energy are related. The general topic of thermodynamics is the transfer of energy from one location or form to another. The fundamental idea is that heat is a type of energy that is equivalent to a specific quantity of mechanical labor.

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Answer:

kcl,cacl2

Explanation:

Answer:

Valence electrons are the electrons orbiting the nucleus in the outermost atomic shell of an atom. Electrons that are closer to the nucleus are in filled orbitals and are called core electrons

Explanation:

yup

The age of the rock, based on the given parent to daughter ratio (1:0.5) and using the decay constant for the Potassium-40 isotopic system, is approximately 760 million years.

To determine the age of the rock using the radiometric age equation, we need the parent ratio (P), daughter ratio (D), and the decay constant (λ) for the specific isotope system being used. In this case, the Potassium-40 (K-40) isotopic system is used.

Given:

Parent ratio (P) = 1

Daughter ratio (D) = 0.5

Decay constant (λ) = 5.34 x 10^(-10) (per year for K-40)

Using the radiometric age equation: t = ln(1 + (D/P)) ÷ λ

Substituting the given values:

t = ln(1 + (0.5/1)) ÷ (5.34 x 10^(-10))

Calculating:

t = ln(1.5) ÷ (5.34 x 10^(-10))

Using a scientific calculator, we find that ln(1.5) is approximately 0.4055.

Substituting the value:

t = 0.4055 ÷ (5.34 x 10^(-10))

Calculating:

t ≈ 7.60 x 10^8 years

Therefore, the age of the rock, based on the given parent to daughter ratio (1:0.5) and using the decay constant for the Potassium-40 isotopic system, is approximately 760 million years.

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1) Mixtures involves substances that are mixed together.

2) Colloids , suspensions and solutions are types of mixtures.

We know that the term mixture can be used to describe any two substances that are not chemically combined together. In other words, the term mixture has to do with the putting together of substances that would not lead to any change in the individual properties of the substances that have been mixed together. Two common examples of mixtures are blood and air.

There are various types of mixtures that we have and these include;

Solutions: A solution is a mixture because there is no interaction that is going on chemically between the solute and the solvent.

Colloid: A colloid is a kind of mixture that is made up solutes that can still be seen with the optical eye. That is, the solutes are still large enough

Suspension: A suspension is a kind of mixture in which a solute is scattered in the solvent.

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LiCl

because Li loses 1 electron ==> Li+

and Cl gains 1 electron ==> Cl-

Li+ Cl-

we use the criss cross rule

===> LiCl

True. In a mass spectrometer, analytes need to be ionized before they can enter the mass filter. Ionization is a crucial step that converts neutral molecules into charged ions, enabling their separation and analysis based on their mass-to-charge ratio.

In a mass spectrometer, the ionization process is essential for the analysis of analytes. Analytes are typically introduced into the mass spectrometer as a vapor or gas. The ionization step involves converting these neutral analyte molecules into charged ions. This is achieved through various ionization techniques such as electron impact ionization, chemical ionization, electrospray ionization, or matrix-assisted laser desorption/ionization (MALDI).

Ionization is necessary because the mass spectrometer operates by manipulating charged particles. Once the analyte molecules are ionized, they can be accelerated and directed into the mass filter. The mass filter then separates the ions based on their mass-to-charge ratio, allowing for the detection and measurement of individual ions. By analyzing the mass spectrum generated, valuable information about the composition, structure, and quantity of the analytes can be obtained. Therefore, the ionization step is a crucial prerequisite for the successful operation of a mass spectrometer.

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Ariana is playing basketball with her friends. They are using an orange basketball. Because all visible light waves except orange are absorbed by the ball.

The correct answer is A.

The correct answer is A.

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Answer:

Option B. Rb⁺ and Sr²⁺

Explanation:

From the question given above,

Rubidium (Rb) is located in group 1 Strontium (Sr) is located in group 2.

Group 1 element can only form ion by losing 1 electron. Thus, Rubidium (Rb) can form ion by losing it outmost electron (i.e 1) according to the equation below:

Rb —> Rb⁺ + e¯

Thus, Rubidium form ion as Rb⁺

Group 2 element can form ion by losing 2 electrons. Thus, Strontium (Sr) can form ion by losing it outmost electron(s) (i.e 2) according to the equation below:

Sr —> Sr²⁺ + 2e¯

Thus, Strontium form ion as Sr²⁺

SUMMARY:

Rubidium form ion as Rb⁺

Strontium form ion as Sr²⁺

Therefore, option B gives the correct answer to the question.