Which choice is equivalent to the quotient below?
100
√25
OA. 2
OB. √2
O C.
O D.
NOT NE

The roles of the substances in the equation is substances C₃H₈ and 5O₂ are reactants that react to form the products 3CO₂ and 4H₂O. The correct option is d.

A balanced chemical reaction is one in which the number of individual element atoms present on the reactant side and the number of individual element atoms present on the product side must match.

The species present on the left side of the right arrow are reactants in the balanced chemical reaction, and the species present on the right side of the right arrow are products.

Therefore, the correct option is d, the substances C₃H₈ and 5O₂ are reactants that react to form the products 3CO₂ and 4H₂O.

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The question is incomplete. Your most probably complete question is given below:

What are the roles of the substances in the equation?

The substances C3H8 and 3CO2 are reactants that react to form the products 5O2 and 4H2O.

The substances 3CO2 and 4H2O are reactants that react to form the products C3H8 and 5O2.

The substances 5O2 and 3CO2 are reactants that react to form the products C3H8 and 4H2O.

The substances C3H8 and 5O2 are reactants that react to form the products 3CO2 and 4H2O.

The heat absorbed by the ice is given by the formula: heat = mass * specific heat capacity * change in temperature.

The mass of the ice is 165g. The specific heat capacity of water is 4.18 J/g°C. The change in temperature is 37.0°C - 0.0°C = 37.0°C.

The heat absorbed by the ice is: 165g * 4.18 J/g°C * 37.0°C = 29,894.5 J

To convert from J to kcal: 1 kcal = 4184 J. Therefore,

29,894.5 J / 4184 J/kcal = 7.13 kcal

The heat absorbed by the ice is 7.13 kcal

Answer:

To answer this question, we'll need to use two equations:

E

=

h

ν

,

and

c

=

λ

ν

,

where

E

is energy in Joules,

h

is Planck's constant of

6.626

×

10

−

34

Joule-seconds,

ν

is frequency,

c

is the speed of light, which is

2.9979

×

10

8

m

/

s

, and

λ

is wavelength in meters.

Since

ν

is in both equations, we can combine them:

c

=

λ

ν

ν

=

c

λ

E

=

h

ν

∴

E

=

h

c

λ

The question gives us a wavelength of

0.122 m

, so we can just plug that value into our equation and solve for

E

:

E

=

h

c

λ

E

=

(

6.626

×

10

−

34

J

⋅

s

)

×

(

2.9979

×

10

8

m

/

s

)

0.122 m

=

1.63

×

10

−

24

J

The lattice energy of molecular crystals is calculated using the enthalpy of sublimation (ΔHsub) according to hess’ law of constant heat of summation.

More energy is needed per gram for sublimation and evaporation below 100 °C than 540 calories. One gram of water needs approximately 585 calories to evaporate at 20 °C (68 °F). The latent heat of vaporization is released as water vapour returns to liquid form.

Li (g) + Cl(g) → LiCl(s)

ΔHf(LiCl) = ΔHsub(Li) + IP(Li) + ΔHdiss(Cl) + EA(Cl) + L.A

L.A (Lattice energy of LiCl) = ΔHf(LiCl) -{ΔHsub(Li) + IP(Li) + ΔHdiss(Cl) + EA(Cl)}

ΔHf = Enthalpy of formation

ΔHsub = Enthalpy of sublimation

IP = Ionization potential of Li

ΔHdiss = Enthalpy of dissolution

EA = Energy of activation.

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a) There are 26 valance electrons in [tex]NF_{3}[/tex] .

b) The central atom bears all the other atoms

c)  CO₂ - Carbon is the central atom

[tex]PH_{3}[/tex] - Phosphorus is the central atom

SiO₂ - Silicon is the central atom.

We have to note that when we talk about the valence electrons, we mean the electrons that tend to occupy the valance shells of the atoms of the elements.

In the case of the compound that has been shown in the question,[tex]NF_{3}[/tex] has about 26 valence electrons and this can be shwn from the Lewis structure of the compound shown.

The term central atom has to do with the atom to which all of the other atoms or groups can be seen to be attached.

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Answer:

9.990-357

Explanation:

aru not arh is 9.990-357

The volume of a 2.498M solution that contains 245 g of sulfuric acid is 1L.

The volume of a solution can be calculated from the molarity using the following expression:

Molarity = no of moles ÷ volume

Molarity refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

no of moles of sulfuric acid = 245g ÷ 98g/mol

no of moles of sulfuric acid = 2.5moles

volume = 2.5moles ÷ 2.498M

volume = 1L

Therefore, 1L is the volume of the sulfuric acid solution.

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Answer:

180 m^2

Explanation:

The total area of the vegetable patch and the orchard can be found by adding 46.2m^2 and 133.6m^2, which equals 179.8m^2. Rounded to the nearest square meter, the total area is 180m^2.

To find the total area of the vegetable patch and the orchard, we simply need to add their respective areas together. From this, the total area of the vegetable patch and the orchard is approximately 179.8 square meters when rounded to the nearest square meter.

Area of the vegetable patch = 46.2 m²

Area of the orchard = 133.6 m²

Total area = Area of the vegetable patch + Area of the orchard

Total area = 46.2 m² + 133.6 m²

Total area = 179.8 m²

Therefore, the total area of the vegetable patch and the orchard is approximately 179.8 square meters when rounded to the nearest square meter.

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Answer:

The object will have the smallest change in motion when an equal force is applied is 8kg circle.

Explanation:

Answer:8gk is the a 1

NaCl has greater lattice energy as the size of anions is similar but the size of cation in NaCl is smaller than RbCl.

Lattice energy refers to the release of energy which occurs when the constituent atoms are placed in their respective positions on the crystal lattice. Additionally, it also refers to the amount of energy required to separate an ionic crystal into its component ions. Lattice energy is a measure of the ionic bond strength in an ionic compound. It is used to gain insight into different properties of ionic solids such as solubility, volatility, and hardness. Lattice energy is directly proportional to the ionic charges product and inversely proportional to the internuclear distance or the size of ions. When considering NaCl and RbCl the radius of Rb+ is greater than Na+, hence it will have less lattice energy. The cation with smaller radii exhibits higher lattice enthalpy.

Note: The question is incomplete. The complete question probably is: Why is the lattice energy of NaCl greater than the lattice energy of RbCl?

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Answer:

Magnesium carbide, MgC2, is a binary compound formed from the elements magnesium and carbon. It can be synthesized by reacting magnesium metal with gaseous acetylene (C2H2) at high temperatures. The resulting product is a gray, crystalline solid that is relatively hard and has a high melting point.

It is not possible for magnesium to form a compound with the formula Mg4C2, because this would require the magnesium atom to have an oxidation state of +4, which is not possible for magnesium. Magnesium typically has an oxidation state of +2 in its compounds, so the most likely formula for a magnesium-carbon compound would be Mg2C. However, this compound does not appear to be stable under normal conditions and is not well-known.

The emission of a transmitter is caused by the action of calcium ions, which also cause synaptic vesicle exocytosis, which releases the neurotransmitters inside the vesicles and starts synaptic transmission.

Nearly all bodily biological processes, including heart and muscle pulses, neurotransmission of information, memories and learning baby creation, cell proliferation, and Calcium ions enter the cytoplasm of organelles through calcium channels.

Calcium plays a critical role in the brain's regulation of synaptogenesis and memory formation. This process activates certain calmodulin signal transmission pathways and involves important protein effectors such CaMKs, MAPK/ERKs, or CREB.

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An operational definition is the statement of procedures the researcher is going to use to measure a specific variable.

Researchers can explain in detail what they mean when they use a phrase by using an operational definition. Operational definitions are typically measurable and concrete. This method of defining variables enables others to assess the validity of the study. Operationalization is the procedure in question.

The variables you'll utilize as indicators and the methods you'll employ to observe or measure them are both included in your operational definitions. No matter how solid your conceptual definition may be, you need an operational definition since without one, you cannot measure anything.

Operational variables, also known as operationalizing definitions, describe how you'll quantify and define a particular variable when it's applied to your research. This makes it possible for a different psychologist to duplicate your findings and is crucial in establishing.

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The pairs of solutions that produces a precipitate when combined are  [tex]Cu(NO_{3})_{2}[/tex] and [tex]K_{2} CO_{3}[/tex]3. So the correct option is B.

A precipitate is a solid that is created from a solution in an aqueous state in which two chemicals react. The precipitate then, once formed, will remain floating in solution. If you intervene in the process by putting the solution in a centrifuge, it will press the mass to the bottom of the tube, generating a compact mass.

The generation of the precipitate can be generated only if the characteristics of the compounds will overcome the solubility that it has to be able to generate a reaction.

All this will be generated because in the solution there will be components which will generate a chemical reaction between two ionic compounds. For this reason, the correct option will be B. [tex]Cu (NO_{3}) _{2}[/tex] and [tex]K_{2} CO_{3}[/tex].

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The number of particles of gold that are in 2.3 moles of Au is 1.38 * 10²⁴ particles.

The number of moles of O₂ in 15.5 grams of O₂ is 0.48 moles

The mass in grams of 2.47 x 10²¹ formula units of sodium oxide is 0.254 grams

The number of atoms of titanium in 23.4 Kg Ti is 2.93 * 10²⁶ atoms

The mass in grams of O₂ needed to produce 75.0 grams of H₂O is 66.67 grams of O₂

The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ is 9.375 g.

The number of particles in a mole of a substance is 6.02 * 10²³.

Considering the given questions:

The number of particles of gold that are in 2.3 moles of Au = 2.3 *  6.02 * 10²³

The number of particles = 1.38 * 10²⁴ particles.

The number of moles of O₂ in 15.5 grams of O₂ = 15.5/32

The number of moles of O₂ = 0.48 moles

The mass in grams of 2.47 x 10²¹ formula units of sodium oxide = 2.47 x 10²¹/ 6.02 * 10²³ * 62 g

The mass in grams of 2.47 x 10²¹ formula units of sodium oxide = 0.254 grams

The number of atoms of titanium in 23.4 Kg Ti = 6.02 * 10²³ * 23.4 * 1000/48

The number of atoms of titanium in 23.4 Kg Ti = 2.93 * 10²⁶ atoms

The mass in grams of O₂ needed to produce 75.0 grams of H₂O = 75/18 * 1/2 * 32

The mass in grams of O₂ needed to produce 75.0 grams of H₂O = 66.67 grams of O₂

The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ = 75/32 * 2 * 2 g

The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ = 9.375 g.

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There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the given statement is false.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Carbon reacts with four Hydrogen's to form methane through covalent bonding. Each hydrogen donates one electron to Carbon therefore having a filled outer shell with 8 electrons.

Therefore, the given statement is false.

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In Part A, "it" refers to "a single idea for the poetry collection."

In Part B, "it" refers to "the correct answer."

A phrase is a group of words that forms a part of a sentence and does not contain a subject and verb. Phrases are used to add structure and detail to sentences, and they can be used to perform various grammatical functions in a sentence.

There are several different types of phrases, including noun phrases, verb phrases, adjective phrases, and adverb phrases.

Therefore, below are some examples of phrases:

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In the image below, the formally charged carbon in molecule 1 has 2 hydrogen(s) attached and the formally charged carbon in molecule 2 has 1 hydrogen(s) attached.

Molecule 1 features a carbon atom with two hydrogen atoms attached, while molecule 2 features a carbon atom with just one hydrogen atom attached.

Both molecules have a formally charged carbon, making them unique among the many types of molecules available. With the difference in hydrogen attachment, both molecules offer distinct characteristics and benefits.

This difference in the number of hydrogen atoms affects the molecules' overall structure and properties.

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The process by which bacteria convert NH4 to NO3 to NO4 is called nitrification.

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Option C, The electron transition from n = 5 to n = 1 in hydrogen atom requires the largest amount of energy as it is moving from a higher energy state to a lower energy state, thus overcoming the highest amount of electrostatic force of attraction to the nucleus.

In the hydrogen atom, the energy of an electron is related to its distance from the nucleus, which is characterized by the principal quantum number (n). As the distance of an electron from the nucleus increases, its energy decreases. Therefore, the electron transition that requires the largest amount of energy is when an electron jumps from the state with the lowest principal quantum number to the state with the highest principal quantum number.

From the options given, the transition that requires the largest amount of energy is c. From n = 5 to n = 1 because, in this case, the electron is transitioning from the state with the highest principal quantum number (n = 5) to the state with the lowest principal quantum number (n = 1). This transition requires the largest amount of energy because the electron must overcome the highest amount of electrostatic force of attraction to the nucleus.

It's important to notice that all the other options (a. from n=1 to n=2, b. from n=2 to n=3, d. from n=3 to n=5) are transitions that go to a lower n, meaning that the electron is getting closer to the nucleus and therefore lower energy state.

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Answer:1. 2methylbutene

Explanation:

i:  CH3CH2CH(CH3)CH2OH--H2SO4----------> CH3CH=C(CH3)CH3

      2-methyl butane-1-ol undergoes dehydration to form alkene in presence of an excess of concentrated sulphuric acid to form2-methylbut-2-ene

ii:                           CH3                        

                                I

                CH3CH2C=Ch2

iii: Shown in attach image

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a) The wavelength of the calcium is 620 nm

b) The energy of the calcium is 3.2 * 10^-19 J

c) Electronic configuration of calcium is [tex]1s^2 2s^2 2p^6 3s^2 3p^6 4s^2[/tex]

d) The shorthand configuration is [Ar] 4s².

We know that the flame test is the kind of test that we can be able to use to know the ion that has been present in the sample that we are trying to analyze. When the ample is moistened and exposed to light, we would see a color that corresponds to a given wavelength.

We know that the wavelength of the calcium light can be obtained as 620 nm and that we can see this to be the orange - red light of the calcium shown.

The energy of the light is given from;

E = hc/λ

E = energy

h = Plank's constant

c = speed of light

λ = wavelength

Then we have;

E = 6.6 * 10^-34 * 3 * 10^8/ 620 * 10^-9

E = 3.2 * 10^-19 J

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Answer:

D) increasing land area on islands

Explanation:

Because one of the results of the global warming is rising sea level so it will not increase the land area on island.

We know that matter is anything that has mass and occupy space. It should be at the back of our minds that the properties that matter would have is going to depend on the state that the matter is in. There are three states of matter and the states of matter that we do have are;

Solid

Liquid and

Gas

We have to note that the way that we have the agglomeration of the molecules that compose the substance in any of the states of matter would affect the observed properties of matter in that state.

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Answer:

very simple .For eg we take one...

3KOH + H3PO4 gives K3PO4 + 3H2O

In the given compound,each C=C unit is not stereoisomeric as it does not contain any functional groups.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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X contains metallic bond

Y contains ionic bond

Z contains covalent bond

We know that the crystal structure of a compound would have to do with the way that the atoms and the elements that compose the compound could be said to have been arranged. Thus if a compound is said to have a crystal structure then we can say that the compound would be crystalline in nature as we can see from the table that we have in the question here.

The kind of bonds that we have in the compound is about one of things that can be able to determine whether or not the compound has a crystalline structure as we can see.

Looking at the properties of the compounds that have been shown in the bale that has been attached to the answer that we have here, we can be able to make a decision regarding each of the substances shown.

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Answer:

780

Explanation:

AT first this question looks difficult but if you read it closely its simple. so what we know is that for ever 60 miles he drives 13 hours. So all we have to do is mulyiply 60x13.