HELP!

How many kernel electrons are in Na+1??

Answer:

Mechanical energy is energy that results from movement or the location of an object. Mechanical energy is the sum of kinetic energy and potential energy.

Explanation:

Nuclear energy is energy resulting from changes in the atomic nuclei or from nuclear reactions.

Example: Nuclear fission, nuclear fusion, and nuclear decay are examples of nuclear energy. An atomic detonation or power from a nuclear plant are specific examples of this type of energy.

Answer:

yuh 100% true dude

Explanation:

...............

Answer: alr, gimme a sec

Answer:

Okay I will go look at it

Answer:

Benifits of scientific modeling

Explanation:

When students are engaged in scientific modeling, they are able to notice patterns and develop and revise representations that become useful models to predict and explain--making their own scientific knowledge stronger, helping them to think critically, and helping them know more about the nature of science.

For the first question:

Use the formula: Density = Mass/Volume

Given in the question:

Mass - 1800 mg

Volume - 2 cm3

Calculation

Density = Mass/Volume

= 1800/2

= 900mg/cm3

Therefore, the density is 900mg/cm3.

answer:

a)1.274 g b) 0.013 mole

Explanation:

a) Mass of 1 mol of CuSo4. 5H20=

\(63 + 32 + (16 \times 4) + (7 \times 1) + (16 \times 5)\)

=246g

no. moles of CuSo4. 5H2O=

\( \frac{mass}{mass \: of \: 1mole} \)

so moles

=

\( \frac{3.14}{246} \)

0.013 mole

in the equation

1 mole of sulphuric acid reacts to form 1 mole of CuSo4.5H2O

in other words

0.013 mole of sulphuric acid reacts to form 0.013 mole of CuSo4.5H2O

so mass of 1 mole (Mr) H2So4=

\((2 \times 1) + 32 + (16 \times 4)\)

98g

mass of sulphuric acid= mole × mass of 1 mole

so mass= 0.013 × 98

1.274 g

b) In the equation

1 mole of sulphuric acid reacts to form 1 mole of copper(ll) oxide

in other words

0.013 mole of sulphuric acid reacts to form 0.013 mole of copper (ll) oxide

so 0.013 mole of copper(ll) oxide is reacted

Hope it helped and pls mark brainliest

None of the given pairs of variables are inversely proportional to each other when all other factors remain constant. Therefore, there is no correct answer among the provided options (A to E).

For an ideal gas, the variables that are inversely proportional to each other when all other factors remain constant can be determined using the ideal gas law, which is given by:
PV = nRT
Where P is pressure, V is volume, n is the number of moles of the gas, T is temperature, and R is the ideal gas constant. To find the inversely proportional pairs, we must look for relationships where one variable increases as the other decreases, while keeping the other variables constant.
1. V and T are not inversely proportional, as they are directly proportional according to the ideal gas law (V ∝ T).
2. T and n are not inversely proportional, as they are directly proportional according to the ideal gas law (T ∝ n).
3. n and V are not inversely proportional, as they are directly proportional according to the ideal gas law (n ∝ V).
4. P and T are not inversely proportional, as they are directly proportional according to the ideal gas law (P ∝ T).
None of the given pairs of variables are inversely proportional to each other when all other factors remain constant. Therefore, there is no correct answer among the provided options (A to E).

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Ca(NO_{3})_{2} is added before AgNO3 in the anion scheme to determine nonionic compounds present.

The reason why Ca(NO_{3})_{2}  is added before AgNO_{3} in the anion scheme is to determine nonionic compounds present. A nonionic compound is one that does not ionize and has no net charge. It has no free ions to attract water molecules and does not conduct electricity in water.A nonionic compound is made up of molecules that do not break apart into ions when dissolved in water. In contrast to ionic compounds that dissociate into ions when dissolved in water, nonionic compounds remain intact. These compounds have a neutral charge since they lack free ions in the solution. Examples of nonionic compounds include sugar, alcohols, and oils.Ca(NO_{3})_{2}  is a compound of calcium, nitrogen, and oxygen. It does not ionize in water. When it is added before AgNO_{3} , it forms no precipitate and does not interfere with the precipitation of AgCl or Ag_{2}SO_{4}. It is added to eliminate the interference of other cations that may interfere with the detection of anions present. Therefore, Ca(NO_{3})_{2}  is added before AgNO3 in the anion scheme to determine nonionic compounds present.

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The graphs of the change of phase of the solid crystalline substance on cooling and on heating are found in the attachment.

Change of phase refers to the physical changes that occur when matter transitions from one state to another.

The three common states of matter are solid, liquid, and gas. The changes of phase between these states are:

Melting: The change of phase from solid to liquid. This occurs when heat is added to a solid, causing its particles to vibrate faster and break apart from their fixed positions, resulting in a liquid.

Freezing: The change of phase from liquid to solid. This occurs when heat is removed from a liquid i.e cooling of the liquid, causing its particles to slow down and come together in a more organized structure, resulting in a solid.

Vaporization: The change of phase from liquid to gas. This can occur in two ways:

a. Evaporation: The process by which a liquid changes to a gas at the surface of the liquid, due to the absorption of heat.

b. Boiling: The process by which a liquid changes to a gas throughout the liquid, due to the absorption of heat.

Condensation: The change of phase from gas to liquid. This occurs when heat is removed from a gas, causing its particles to slow down and come together to form a liquid.

Sublimation: The change of phase from solid directly to gas, without passing through the liquid phase. This occurs when heat is added to a solid, causing its particles to vibrate so fast that they escape directly into the gas phase.

Deposition: The change of phase from gas directly to solid, without passing through the liquid phase. This occurs when heat is removed from a gas, causing its particles to come together to form a solid.

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Answer:

Neon is a noble gas, it is monoatomic in nature, which implies that it has only one atom present. If we compare neon with water, water has three atoms present, two hydrogen atoms and one oxygen atom. Hence water stores more energy than neon because it is polyatomic and contains chemical bonds.

Answer:

Hydroelectric power is a renewable energy source which harnesses the power of moving water to produce electricity. As the water flows down through the dam, its kinetic energy is used to turn a turbine. The generator converts the turbine's mechanical energy into electricity.

Explanation:

Hydroelectric power is a renewable energy source which harnesses the power of moving water to produce electricity.

The air - even the cool air - makes the blades rotate, creating kinetic energy.

The blades rotating in this way also form a shaft in the nacelle curve and the generator in the nacelle converts kinetic energy into electrical energy.

As the water flows down through the dam, its kinetic energy is used to turn a turbine. The generator converts the turbine's mechanical energy into electricity.

Wind turbines use blades to collect the kinetic energy of the wind. The air flowing over the blades creates a height (similar to the impact of the wings of a plane), causing the blades to rotate.

The blades are connected to the drive shaft which converts the electric generator, generating (producing) electricity.

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The interaction described, where an alpha particle (helium-4 nucleus) interacts with an oxygen-16 nucleus to form a neon-20 nucleus, exemplifies a nuclear reaction known as nuclear fusion.

Nuclear fusion is the process in which two or more atomic nuclei come together to form a heavier nucleus. In this case, the alpha particle (helium-4 nucleus) is fusing with the oxygen-16 nucleus to produce a neon-20 nucleus. Nuclear fusion reactions involve the release of a significant amount of energy due to the conversion of mass into energy, as described by Einstein's famous equation E = mc^2. This energy release is the driving force behind processes like the sun's energy production and the development of hydrogen bombs.

The fusion of light elements, such as the fusion of hydrogen isotopes in stars, is responsible for the immense energy output and is a fundamental process in the universe. In this specific reaction, the fusion of an alpha particle with an oxygen-16 nucleus leads to the formation of a heavier nucleus, neon-20, and is an example of a nuclear fusion reaction.

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Answer:

i think it 1/2

Explanation:

With  the compound SiH₄, NH₃ will only interact with SiH4 through dispersion intermolecular forces.

When the electrons in two nearby atoms occupy positions that cause the atoms to temporarily form dipoles, the consequence is the London dispersion force, a transient attractive force. The term "induced dipole-induced dipole attraction" is frequently used to describe this effect.

All substances at least have LDF, but molecules can have any combination of these three types of intermolecular interactions.

Just the dispersion forces will be present in the complex when NH₃ reacts with SiH₄.

Dispersion forces are commonly present in all molecules. Therefore, the dipole-dipole, hydrogen bonding, and dispersion forces present in the NH3 molecule.

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In this example, the limiting reagent is the alkyl οr aryl halide (RX), as it is present in a lοwer quantity and will be cοmpletely cοnsumed during the reactiοn.

In οrganic chemistry, an alkyl grοup is an alkane missing οne hydrοgen. The term alkyl is intentiοnally unspecific tο include many pοssible substitutiοns. An acyclic alkyl has the general fοrmula οf −CnH₂n+1.

A cyclοalkyl grοup is derived frοm a cyclοalkane by remοval οf a hydrοgen atοm frοm a ring and has the general fοrmula −CnH₂n+1. Typically an alkyl is a part οf a larger mοlecule. In structural fοrmulae, the symbοl R is used tο designate a generic (unspecified) alkyl grοup. The smallest alkyl grοup is methyl, with the fοrmula −CH₃

In the preparatiοn οf Grignard reagents, the reactiοn typically invοlves the reactiοn between an alkyl οr aryl halide and magnesium metal in an ether sοlvent. The general equatiοn fοr the fοrmatiοn οf a Grignard reagent can be represented as:

RX + Mg -> RMgX

Tο determine the limiting reagent in this reactiοn, we need tο cοmpare the mοles οf the alkyl οr aryl halide (RX) and the mοles οf magnesium (Mg) and identify which reactant is present in the lοwer quantity. The reactant that is cοnsumed cοmpletely and limits the amοunt οf prοduct fοrmed is the limiting reagent.

Let's assume we have a specific example where we are preparing a Grignard reagent by reacting 2 mοles οf alkyl οr aryl halide (RX) with 3 mοles οf magnesium (Mg).

Mοles οf RX = 2 mοles

Mοles οf Mg = 3 mοles

Since the stοichiοmetric ratiο between RX and Mg is 1:1 (1 mοle οf RX reacts with 1 mοle οf Mg), we can see that we have an excess οf Mg in this example.

The stοichiοmetry indicates that 2 mοles οf RX wοuld require 2 mοles οf Mg fοr cοmplete reactiοn. Hοwever, we have 3 mοles οf Mg, which is mοre than enοugh tο react with the 2 mοles οf RX.

Therefοre, in this example, the limiting reagent is the alkyl οr aryl halide (RX), as it is present in a lοwer quantity and will be cοmpletely cοnsumed during the reactiοn.

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Answer:

Acid: HSO4-

Base: NH3

Conjugate Acid: NH4+

Conjugate Base: SO4-2

Explanation:

HSO4- gives a H+ to NH3 making NH4+ the conjugate acid.

Same can be said to the base.

When the numerical value of q is less than k, the reaction proceeds in the forward direction to reach equilibrium. The reaction will proceed in the forward direction to increase .

The reaction quotient, which is calculated using the concentrations of reactants and products at any given time during a reaction. K is the equilibrium constant, which represents the ratio of the concentrations of products to reactants at equilibrium.

When q (the reaction quotient) is less than k (the equilibrium constant), it means that there are more reactants than expected at equilibrium. In order to reach equilibrium, the reaction needs to proceed forward, converting reactants into products until q becomes equal to k, and the system reaches equilibrium.

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A change is imposed on a system at equilibrium. according to le châtelier's principle, how will the system respond? by shifting the equilibrium so that the effect of the change is enhanced by shifting the equilibrium so that the effect of the change is reduced by providing an alternative reaction pathway by preventing the equilibrium from shifting This principle, proposed by the French chemist Henri Louis Le Châtelier's in 1888, states that if a change is imposed on a system at equilibrium, the position of the equilibrium will shift in the direction that tends to reduce the impact of that change.

Kurt Wimmer's 2002 science fiction picture Equilibrium with Christian Bale, Emily Watson, and Taye Diggs is an American production.

In a future where sentiments and creative expression are forbidden and people are forced to regularly inject themselves with potent psychoactive substances to stifle their emotions, the movie follows John Preston (Christian Bale), a law enforcement officer. Preston experiences feelings after unintentionally missing a dose, which causes him to reflect on his morality and restrict his behavior while hoping to avoid being discovered by the watchful society he lives in. The regime he is helping to overthrow trained him excellent martial skills, which he uses to support a resistance movement.

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Answer:

designing a solution

Explanation:

i found the answer on quizlet lol

Based on the given information, the engineers are in the "designing a solution" stage of technological design.The correct answer is option B.

Materials are substances or matter that are used to make objects, structures, or products. Materials possess physical and chemical properties that determine their behavior and suitability for various applications.

B. Designing a solution is an appropriate answer because after identifying the need for a new material to build an oil tanker, they are now supposed to develop plans and designs for the material that meets the desired characteristics of being lightweight, strong, and durable. The engineers are in second stage of technological design.

Therefore, based on the information provided, the engineers are currently in the "designing a solution" stage of technological design. Option B is the correct answer.

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Explanation:

A substance that breaks apart in water is either an ionic or covalent bond. However, elements of an ionic bond do not dissolve in water. Rather they react with water. Therefore, the correct answer is covalent compound.

Answer:

The correct answer is A.

Answer:

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.

Explanation:

Answer:

the answer is stimilus!

Explanation:

Answer:

C producers

Explanation:

All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.

Answer:

exothermic - bending a plastic ruler , cutting paper, melting ice cream, ripening of fruit, souring of milk.

Explanation:

endothermic- baking of cake .

The substance that is closely associated with the breakdown of the ozone layer is (C) Chlorofluorocarbons (CFCs).

CFCs are a type of synthetic chemicals that were widely used in refrigeration, air conditioning, and aerosol products before they were found to be harmful to the environment. CFCs contain chlorine, which is released into the atmosphere when these chemicals break down. When the chlorine molecules come into contact with ozone, they break it apart, causing a reduction in the ozone layer.

The ozone layer is important because it absorbs harmful UV rays from the sun, which can cause skin cancer and other health problems in humans and animals. The depletion of the ozone layer can also cause changes in weather patterns and harm plant growth.

In response to the negative effects of CFCs on the ozone layer, the international community came together to create the Montreal Protocol in 1987. This treaty phased out the production and use of CFCs and other ozone-depleting substances, leading to a gradual recovery of the ozone layer.

In conclusion, the correct option is (C) Chlorofluorocarbons (CFCs). It is important to continue to reduce the use of CFCs and other harmful chemicals in order to protect our planet and the health of all living beings.

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