10.

(05. 05 MC)


Read the chemical equation.


Fe2O3 + CO → Fe + CO2


If 1. 8 moles of Fe2O3 react with 2. 7 moles of CO, how many moles of each product are formed? (3 points)

5. 4 moles Fe and 1. 8 moles CO2

2. 7 moles Fe and 0. 9 moles CO2

3. 6 moles Fe and 5. 4 moles CO2

1. 8 moles Fe and 2. 7 moles CO2

Answer:

Yes it does because the atoms/molecules are moving faster than they are in a cold substance.

Explanation:

Answer: 3:2

Explanation: there is 3 Cu and 2 NO

We expect 2-chloro-2-methylbutane to sit at the bottom of the separation setup due to its higher density compared to water.

The density of 2-chloro-2-methylbutane is given as 0.866 g/ml. The density of a substance helps us determine how it will sit or behave in a separation. In this case, since the density of 2-chloro-2-methylbutane is greater than 1 g/ml (the density of water), it will be more dense than water.

When two immiscible liquids with different densities are placed together, the denser liquid will sink below the less dense liquid. In this case, 2-chloro-2-methylbutane will sink below water if they are placed in a separation setup.

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The phenomenon in which an enzyme undergoes a conformational change that strains chemical bonds within the substrates (reactants) and/or brings them closer together is called induced fit.

The induced fit model refers to the process in which an enzyme changes its shape to bind to the substrate more precisely after the substrate has entered the active site of an enzyme. It results in an increase in the rate of catalysis. The active site on the enzyme changes shape to properly align and stabilize the substrate. The induced fit model is frequently referred to in connection with enzymes because of this action.

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Answer:

Well its actually the movement of tectonic plates under the earths surface that when the slide along each other, pull away from each other, or push up against each other they create earth quakes.

Explanation: yes.

The reaction CaCO3(s)+2HCl(aq)CaCl2(aq)+CO2(g)+H2O(l) has the following net ionic equation: CO32(aq) +2H+(aq)CO2(g)+H2O(l) (option B).

Chemical processes occur when atoms form or break chemical bonds. The substances that start a chemical reaction are known as reactants, and the compounds that are produced as a result of the reaction are known as products.

Chemical reactions involve the transformation of one or more substances into different substances. During a chemical reaction, atoms are rearranged and chemical bonds are broken and formed, resulting in a change in the chemical and physical properties of the substances involved.

Chemical equations still need to be balanced, which calls for an equal number of atoms for each element on both of the equation's two sides. As a result, the mass of the reactant and the products of the reaction must coincide.

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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It is clear from the tabular data that, the monkeys in troop 2 were better to avoid predators and more of them  were able to reproduce. Hence, option D is correct.

In the biosphere, not all living things are fit to survive for a longer life time. Most of them are pray of other higher level animals. Some organisms adopt some strategies to hide from their predators and they can survive more.

It is clear from the table that, the monkeys residing in the ground are more prone to the attacks by their predators. Whereas monkeys living in trees can survive more.

In each year the survival rate is increasing for both troop. However the more number of monkeys which can sustain their population is in troop 2. Therefore, option D is correct.

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Hormone precursor analogs can be synthesized through electrophilic aromatic substitution reactions, and their regioselectivity can be analyzed using NMR spectroscopy.

Hormone precursor analogs can be synthesized by performing electrophilic aromatic substitution reactions, which involve replacing a hydrogen atom on an aromatic ring with an electrophilic group. The regioselectivity of the reaction determines the specific position where the substitution occurs. NMR spectroscopy can be used to analyze the regioselectivity by providing information about the chemical shifts and coupling patterns of the protons in the synthesized analog.

In electrophilic aromatic substitution reactions, a precursor molecule containing an aromatic ring is treated with an electrophile under appropriate reaction conditions. The electrophile reacts with the aromatic ring, replacing one of the hydrogen atoms and forming a new bond. The regioselectivity of the reaction depends on factors such as the nature of the electrophile and the substituents present on the aromatic ring. Different positions on the ring can be selectively substituted, leading to the synthesis of various hormone precursor analogs.

NMR spectroscopy is a powerful analytical technique that can be used to study the regioselectivity of the reaction. By analyzing the NMR spectrum of the synthesized analog, valuable information about the position of the substitution can be obtained. The chemical shifts observed in the NMR spectrum provide insights into the electronic environment of the substituted proton, allowing for the determination of the regioselectivity. Coupling patterns between neighboring protons can also reveal the connectivity of the aromatic ring and confirm the desired substitution.

In summary, hormone precursor analogs can be synthesized via electrophilic aromatic substitution reactions, and their regioselectivity can be analyzed using NMR spectroscopy. This combination of synthetic chemistry and analytical techniques enables researchers to design and study novel analogs with specific substitution patterns, contributing to the understanding and development of hormone-related compounds.

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To combine ions to form ionic compounds, we need the combine in such a way that it gets neutral charge.

We can combine each anion with each cation to get the 4 compounds we need.

To combine SO₄²⁻ with Pb⁴⁺ we first find the Least Common Multiple of their charges, 2 and 4.

They have the factor 2 in common, so the LCM is 4. This is the final charge of each that will cancel out.

To get 4+, we only need 1 Pb⁴⁺.

To get 4-, we need 2 SO₄²⁻.

So, the formula is:

Pb(SO₄)₂

To combine SO₄²⁻ with NH₄⁺ is easier because one of them has single charge. In this case, we can simply pick one of the multiple charge ion and the same amount that will cancel its charge of the single charged one.

So, we picke 1 SO₄²⁻, ending with 2-.

And we picke 2 NH₄⁺, ending with 2+.

The formula:

(NH₄)₂SO₄

To combine C₂H₃O₂⁻ with Pb⁴⁺ we do the same, because the anion is single charged.

Pick 1 Pb⁴⁺, ending with 4+.

Pick 4 C₂H₃O₂⁻, ending with 4-.

The formula:

Pb(C₂H₃O₂)₄

To combine C₂H₃O₂⁻ with NH₄⁺, both have same charge, so we just need one of each and their charges will cancel out.

The formula:

NH₄C₂H₃O₂

So, the formulas are:

Pb(SO₄)₂

(NH₄)₂SO₄

Pb(C₂H₃O₂)₄

NH₄C₂H₃O₂

To prepare the desired solution, the mass of the solute (sucrose) must be calculated based on the desired percentage concentration and the total mass of the solution.

To prepare a 15% by mass solution with a total mass of 650g, the mass of sucrose needed to be dissolved into water is 97.5 grams. This can be calculated by multiplying the total mass of the solution by the percent by mass concentration as shown below:

Mass of sucrose = 15% x 650g = 97.5g.

Therefore, 97.5g of sucrose needs to be dissolved into water to prepare a 15% by mass solution with a total mass of 650g.

To prepare a 15% by mass solution with a total mass of 650g, 97.5 grams of sucrose needs to be dissolved into water. This is determined by multiplying the total mass of the solution (650g) by the percentage by mass concentration (15%). The resulting mass of sucrose (97.5g) is then dissolved into the water to make the solution.

In conclusion, to prepare the desired solution, the mass of the solute (sucrose) must be calculated based on the desired percentage concentration and the total mass of the solution.

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The formation of Na2O through the transfer of electrons is Illustrated.

The atom is made up of subatomic particles such as electrons, protons, and neutrons. The atom is made up of a central nucleus that contains neutrons and protons. The nucleus is surrounded by electrons. Electrons are negatively charged, while proton and neutron are positively charged. An electron is a negatively charged subatomic particle that can be bound to or free from an atom.

Because sodium requires two electrons to complete its octet, it transfers one electron to oxygen. To complete the octet, oxygen requires one more electron. As a result, another sodium atom donates its electron to the oxygen atom. Three ions that attract one another form the overall neutral-charge ionic compound.

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To make 100 ml of a 0.2 M fruit drink solution from a 1.0 M fruit drink solution, you would need to mix 20 ml of the 1.0 M solution with 80 ml of water.

The formula msvs = mdvd is used to calculate the amount of concentrated solution needed. Here, msvs represents the initial molarity of the concentrated solution, mdvd represents the desired molarity of the diluted solution, and m and v represent the mass and volume of the solution, respectively.

In this case, the desired molarity is 0.2 M, and the initial molarity is 1.0 M. Using the formula, we can calculate the ratio of the volumes:

msvs × vsvs = mdvd × vdvd

1.0 M × vsvs = 0.2 M × 100 ml

vsvs = (0.2 M × 100 ml) / 1.0 M = 20 ml

Therefore, you would need 20 ml of the 1.0 M fruit drink solution. To reach a total volume of 100 ml, you would then add 80 ml of water.

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Answer: D. If the reaction occurs in the gas phase

Explanation:

Answer:

D is correct via A P e x

Explanation:

Answer:

1.10 g/mL

Explanation:

The amount of volume an object displaces is the amount of volume that object takes up.

7.87 - 1.67 = 6.2

The object has a volume of 6.2 mL.

You have the mass (6.82 g) and the volume (6.2 mL).  Divide the two value to find the density.

(6.82 g)/(6.2 mL) = 1.10 g/mL

The density of the object is 1.10 g/mL.

Answer:

C

Explanation:

A gas is a state of matter that has no fixed shape and no fixed volume gases have lower density than other states of matter such as solids and liquids.

Answer:

it explodes

Explanation:

Answer:

Mrs girl I'm sorry I don't know

I just need the points

Answer:

When you look only at the “before” and “after” of a change, you are considering it as static change. In this perspective, you look at change as a one-dimensional shift. A situation or object was one way, and now it is different because some outside force acted on it to make it change.

Explanation:

Its the def

When sodium nitrate (NaNO3) and ammonium chloride (NH4Cl) are mixed in water, they will dissociate into their respective ions:

NaNO3 → Na+ + NO3-

NH4Cl → NH4+ + Cl-

A homogeneous mixture is a type of mixture that has a uniform composition and appears visually and chemically the same throughout its entire volume. In other words, a homogeneous mixture is one that has the same proportion of components in all parts of the mixture.

All of these ions are soluble in water. Therefore, when the two solutions are mixed, the resulting solution will contain all four ions: Na+, NO3-, NH4+, and Cl-.

There will be no chemical reaction between the ions from the two salts as they do not react with each other. Thus, the resulting solution will be a homogeneous mixture of the four ions.

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The empirical formula of the original compound given the combustion analysis data is CH₂O

Mass of C = (12 / 44) × 51.29

Mass of C = 13.99 g

Mass of H = (2 / 18) × 20.99

Mass of H = 2.33 g

Mass of O = (mass of compound) – (mass of C + mass of H)

Mass of O = 35 – (13.99 + 2.33)

Mass of O = 18.68 g

Divide by their molar mass

C = 13.99 / 12 = 1.1658

H = 2.33 / 1 = 2.33

O = 18.68 / 16 = 1.1675

Divide by the smallest

C = 1.1658 / 1.1658 = 1

H = 2.33 / 1.1658 = 2

O = 1.1675 / 1.1658 = 1

Thus, the empirical formula of the compound is CH₂O

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Answer:

88.5914811 it depends on the water

Explanation:

what you have to do it divide the mass by the volume.

Answer:

thank you for this oibnki

Answer:

Sure I'll go ahead and like your answers and follow you if that's what you wanted! :)

Explanation:

The long will the reaction will take to reduce the concentration of to the 50% of its original value is 1386 sec. The option A is correct.

The expression is as :

d[N₂O₅] / dt = -0.0005 [N₂O₅]

[N₂O₅] (t) = [N₂O₅] (0) . e^-0.0005t

[N₂O₅](t) = Ce^-0.0005t

The reaction concentration of to the 50% of its original value is 0.5 C

0.5 C = Ce^-0.0005t

By dividing both side by C

0.5 = e^-0.0005t

Now taking the natural logarithm on the both side, we get

ln0.5 = lne^-0.0005t

ln 0.5 = - 0.0005t

t = - 0.693 / - 0.0005

t = 1386 sec

The time taken is 1386 sec. The correct option is A.

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Thus question is incomplete, the complete question is :

Experiments show that if the chemical reaction N2O5→2NO2+1/2O2, takes place at 45°C, the rate of reaction of dinitrogen pentoxide is proportional to its concentration as follows: -d[N2O5]/dt = 0.0005[N2O5] How long will the reaction take to reduce the concentration of N2O5 to 50% of its original value? select the correct answer. question 4 options:

A) t = 1386 sec

B) t = 211 sec

C) t = 2345 sec

D) t = 111 sec

The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. Temperature affect the pH. At room temperature pH scale is between 0 to 14. 7 is the pH of neutral solution. No, acid would not remain acid  if the positions of electrons and protons were swapped.

Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

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Answer:

Atomic emission spectra are produced when excited electrons return to the ground state. When electrons return to a lower energy level, they emit energy in the form of light.

Explanation:

Answer:

Mendeleev’s periodic table is, based on the relation of elements’ properties as dependent on the atomic weight of the element. But the Modern periodic table considers atomic number as the fundamental property that decides the properties of elements.

The modern periodic table does correct the defects of Mendeleev’s periodic table. For example, in Mendeleev’s periodic table, in the element pairs, Argon-potassium, cobalt-nickel, tellurium-iodine and thorium and protactinium, elements with higher atomic mass precede the element with lower atomic weight. However, it is the right places for them but is against Mendeleev’s periodic law.

These elements atomic number shows the reverse order compared to atomic mass. The supposed to be wrong positions in Mendeleev’s table has the right explanation justifying their positions.