The production of uric acid is advantageous to birds because uric acid __________.

The properties of an ionic compound are as follows:

Thus, the correct options for this question are C and D.

An Ionic compound may be defined as a type of chemical compound that is significantly composed of ions that are held together by electrostatic forces referred to as ionic bonding.

The properties of ionic compounds are determined by the process through which they dissociate from one another when they dissolve in water. For example, NaCl. They are good conductors of heat and electricity.

Therefore, the correct options for this question are C and D.

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1.5 contains two significant figures i.e. 1 and decimal number 1.5 .

Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.

There are 3 rules to determine significant figures ,there are as :

1. Non-zero digits are always significant.

2. Any zeroes between two significant figures digits are significant.

3. A final zero in the decimal portion only are significant.

Hence, 1.5 contains two significant figures .

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The density of solid is 2730kg/m^3.

The amount of "stuff" in a certain amount of space is measured by its density. The definition of it is the mass per unit volume.

Given:

Total density = 2030kg/m^3

Water content = 25%

Gs= 2.73

Density of water = 1000kg/m^3

To find:

Density of solid = ?

Formula:

Dry density = moist density / 1 + water content

Density of solid = Gs x density of water

Calculations:

Density of solid = 2.73 x 1000

Density of solid = 2730kg/m^3

Dry density = 2030 / (1+0.25)

Dry density = 2030 / 1.25

Dry density = 1624kg/m^3

Result:

The density of solid is 2730kg/m^3 and the dry density of the soil is 1624kg/m^3.

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When an electron in a hydrogen atom undergoes the transition from the energy level. The wavelength is 97.3 nm.

The separation between similar points in successive waves of a waveform signal that have traveled across space or along a wire.

1 / λ = -1.097 x 107 m-1 ( 1/nf2 - 1/ni2 )

λ = wavelength in m

nf = final energy level = 1

ni = initial energy level = 7

1 / λ = -1.097 x 107 m-1 (1/16 - 1) = 1.097 x 107 m-1 (-0.9375)

1 / λ = 1.028 x 107 m-1

λ = 9.73x10-8 m = 97.3 nm

Thus, the wavelength, in nanometers, of the spectral line is 97.3 nm.

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The amount of ml for 22% NaCl solution required to formulate the prescription is 139ml.

To find the solution need to formulate prescription, the given data's are,

30% of Nacl solution will have 250 ml

Find for 22%.

Sodium chloride, or salt, is an ionic substance with the chemical formula NaCl that represents a 1:1 ratio of sodium and chloride ions.

The body that required NaCl also known as salt, Sodium Chloride (NaCl) is critical for proper functioning of the human body.

From the given values,

22/100x + 40/100(250-x) = 30/100 × 250

22x + 40(250 - x) = 30 × 250

22x - 40x = 7500 - 10000

18x = 2500

x = 2500/18

x = 138.89ml

Thus, from the metrics given, it is correct to state that the amount of ml of 22% NaCl solution required to formulate the prescription is 139ml.

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If 233.76g NaCl in 1l of water makes a solution of 1M, then the same amount in 5l solution will make 1/5M solution.

What is molarity?

The term "molar concentration" is used to define the concentration of a chemical species, specifically a solute, in a solution. It denotes the quantity of a substance per unit volume of solution. Other synonyms for this phrase include quantity, substance concentration, and molarity.

M = n/V

where,  n = no of moles of solute that is solute concentration

V = volume of solution

and, M = molarity of the solution.

If 233.76g of sodium chloride dissolves in 1 litre of water to form a 1 M solution, then the same amount in 5 litres will form a 1/5 M solution.

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All halides (nonmetals) could form an ionic compound with magnesium with the formula mgx2.

What are ionic compounds?

A chemical compound known as an ionic compound in chemistry is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.

The proportional size of the cations and anions determines how an ionic molecule is structured. Salts, oxides, sulphides, hydroxides, and the majority of inorganic compounds are examples of ionic compounds. The electrostatic forces of attraction between positive and negative ions hold together ionic solids.

All halides or other non metallic ions like OH- that require one electron to satisfy their octet  that is noble gas configuration will form compounds with the formula MgX2.

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Benzoic acid in the presence of [tex]SOCl_2[/tex] gets converted to benzoyl chloride which further gets converted to benzamide when treated with ammonia. Benzamide gets reduced to benzylamine by [tex]LiAlH_4[/tex].

Steps involved in the preparation of benzylamine from benzoic acid:

Step 1:

Benzoyl chloride is formed on replacement of [tex]-OH[/tex] group with [tex]-Cl[/tex] group when benzoic acid is treated with thionyl chloride.

Step 2:

Benzoyl chloride converts to benzamide by the replacement of [tex]-Cl[/tex] group with [tex]-NH_2[/tex] group on treatment with ammonia.

Step 3:

Benzamide is reduced to benzylamine in the presence of [tex]LiAlH_4[/tex]. The strong reducing agent converts the carbonyl group (C=O) to [tex]-CH_2-[/tex] group.

Benzylamine is a chemical compound that is organic in nature. A primary amine molecule called benzylamine has benzyl as the N-substituent. This colourless liquid that is soluble in water is a popular starter in organic chemistry and is utilized in the manufacturing process of many medications.

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The weight of the column is 1224.73 pounds.

r = 380 mm/2 = 190 mm

r = 0.190 m; a radius of a concrete column

l = 2 m; a length of a concrete column

d = 2.45 Mg/m³; density of a concrete

V = r² × π × l

V = (0.190 m)² × 3.14 × 2 m

V = 0.227 m³; volume of a column

m = d × V

m = 2.45 Mg/m³ × 0.227 m³

m = 0.555 Mg

1 Mg = 1000 kg

m = 555.4 kg; mass of concrete

W = 555.4 kg × 9.8 m/s²

W = 5443.25 N

W = 5443.25 N × 0.225 Ibf/N

W = 1224.73 Ibf; weight of a concrete

The weight of an object is the amount of force acting on the object due to gravity. SI unit for weight is newton (N).

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Yes, a reaction occurs.

When Magnesium nitrate Mg(NO3)2 and iron (II) sulphate (FeSO4) are combined, double displacement reaction takes place.

       AB  + CD →  AD + CB

Ionic equation according to the question-

FeSO4 + Mg(NO3)2 → Fe(NO3)2 + MgSO4

Here, Iron (II) sulphate reacts with Magnesium nitrate to form Iron nitrate and  magnesium sulphate by undergoing double displacement reaction.

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Yes, there is a reaction when iron (II) sulphate (FeSO₄) and magnesium nitrate Mg(NO₃)₂ are mixed.

Double displacement reaction occurs when iron (II) sulphate (FeSO₄) and magnesium nitrate Mg(NO₃)₂ are mixed.

Displacement reaction- When a less reactive element is pushed out of a compound that also contains a more reactive ingredient, the result is a displacement reaction. The less reactive element is now pure and left alone following a displacement reaction.

AB + C → A + CB

whereas,

Double displacement reaction- In a double displacement reaction, two compounds swap cations or anions (ions) to create two new molecules.

AB  + CD →  AD + CB

FeSO₄ + Mg(NO₃)₂ Fe(NO₃)₂ + MgSO₄ is the ionic equation in response to the query.

Here, a double displacement reaction occurs between magnesium nitrate and iron (II) sulphate to produce iron nitrate and magnesium sulphate.  

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The total degrees of freedom for helium are three.

The number of ways that a molecule can move or vibrate in space in gaseous phase is known as degree of freedom. The degree of freedom depends on the total number of atoms and the geometrical structure of atoms.

There are three types of degrees of freedom; rotational, translational and vibrational. The degree of freedom for helium is three for translational motion only.

The degree of freedom for monoatomic is three such in the case of helium. A molecule can have different degrees of freedom for different types. For examples, the degrees of freedom for NH3 is 3 for translational and rotational and six for vibrational.

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Answer:

exothermic chemical reaction.

Explanation:

you can feel it

Answer:

2H+(aq) is the net ionic equation.

This means that you must take 2.5ml of the stock solution and make up to mark with 7.5 ml of water. You should add acid to water and not water to acid.

The terms ACID (atomicity, consistency, isolation, and durability) refer to a set of characteristics of database transactions that are meant to ensure data validity despite errors, power outages, and other unforeseen circumstances.

A transaction is a series of database activities that adhere to the ACID principles and can be thought of as one logical operation on the data in the context of databases. For instance, a transfer of money between bank accounts, even when it involves many adjustments like debiting one account and crediting another, is only one transaction.

Building on previous work by Jim Gray, who identified atomicity, consistency, and durability but not isolation when describing the transaction concept, Andreas Reuter and Theo Härder created the acronym ACID in 1983.

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The change that can make the model of nitrogen atom more accurate is to show 7 neutrons in the nucleus. The correct option is C.

An atom is a matter unit of matter that defines a chemical element distinctively. An atom is made up of a central nucleus one or more negatively charged electrons.

The nucleus is positively charged and encompasses one or more protons and neutrons, which are relatively heavy particles.

Nitrogen is an atom with seven protons, seven neutrons, and seven electrons. The nucleus is made up of neutrons and protons that are all stuck together in the middle of the atom.

The addition0. of 7 neutrons in the nucleus can improve the accuracy of the nitrogen atom model.

Thus, the correct option is C.

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Your question seems incomplete, the complete question is:

A students drawing of a nitrogen atom is shown. What change would make the model more accurate?

A-move the electrons into the nucleus

B-add 2 more protons

C-show 7 neutrons in the nucleus

D-remove 2 electrons

Particles can be arranged in a variety of ways. Particles of liquid gold move closer together as it solidifies. Thus, option D is correct.

When a liquid is cooled and transforms into a solid, freezing takes place. A solid is created when the particles in a liquid eventually cease moving and settle into a stable configuration.

Attractive forces start to capture particles, and a solid's crystals start to take shape.

Therefore, the rearrangement of particles in a physical change describes When liquid gold becomes a solid, its particles get closer together.

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Answer:

The answer is option D on indeguity

Explanation:

Adding water to each solid quickly separates them; K₂SO₄ is soluble while BaSO₄ is insoluble. K₂SO₄ cannot form a precipitate, whereas BaSO₄ can form a precipitate.

Many factors influence solubility, one of which is lattice energy or the stability of the lattice and bond. The rule now states that bigger anions are stabilized by bigger cations and smaller anions are stabilized by smaller cations.

Since (SO4)²⁻ is a larger anion, the stability of the compound rises as the size of the cation does as we move down the group. As a result, the solubility drops. BaSO₄ is therefore insoluble.

Now, this goes against the trend found for k⁺. K₂SO₄ is an ionic molecule in this instance, and most ionic molecules are soluble in water. Dipoles and the extreme polarity of ionic substances are reasons for their solubility. Although they are held together so firmly that water is unable to separate them, not all ionic substances are soluble in water.

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The mole fraction of glycerol in this solution is 3.58%.

d = 1.037 g/ml; density of the solution

M(HOCH₂CH(OH)CH₂OH) = 92.095 g/mol; molar mass of glycerol

m= 100 ml × 1.037 g/ml

m= 103.7 g; mass of 100 ml of the solution

m(HOCH₂CH(OH)CH₂OH) = 0.16 × 103.7 g

m(HOCH₂CH(OH)CH₂OH) = 16.592 g; mass of glycerol

n(HOCH₂CH(OH)CH₂OH) = 16.592 g ÷ 92.095 g/mol

n(HOCH₂CH(OH)CH₂OH) = 0.180 mol; amount of glycerol

m(water) = 103.7 g - 16.592 g

m(water) = 87.108 g

n(water) = 87.108 g ÷ 18.0153 g/mol

n(water) = 4.835 mol; amount of water

mole fraction = 0.180 mol ÷ (0.180 mol + 4.835 mol)

mole fraction = 0.0358 = 3.58%

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Explanation:

Sodium is a reactive metal, and so can't be extracted by electrolysis of an aqueous solution.

The main ore of sodium is common salt, sodium chloride.

Calcium chloride is added to the purified ore to lower the melting point from around 800°C to around 600°C, so that energy costs are lowered and this is economical because it saves on electricity used in heating.

The empirical formula of a compound found to contain 7.353 g of Al and 6.547 g of O is Al2O3.

We are given that

Mass of Al = 7.353 g

Mass of O = 6.547 g

To calculate the moles of the compounds, we need to divide the given mass by their molar mass

Moles of Al = 7.353/27 = 0.272

Moles of O = 6.547/16= 0.409

Now we need to divide the moles by the least common number i.e, 0.272.

Moles of Al/0.272 = 0.272/0.272= 1

Moles of O/0.272= 0.409/0.272 = 1.5

Now, to convert these values into whole numbers we should multiply them by 2

Moles of Al = 2

Moles of O = 3

Thus, the ratio of Al:O = 2:3

Hence, the empirical formula of a compound found to contain 7.353 g of Al and 6.547 g of O is Al2O3.

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The molarity of 0.800 moles of sugar in 250 ml of solution is 3.2 M

To solve this molarity problem, the formulas and the procedures that we have to use are:

M = n(solute)/v(solution) L

Where:

Information about the problem:

Converting the volume units from (ml) to (L) we have:

v(solution) =  250 ml * (1 L/1000 ml)

v(solution) = 0.250 L

Applying the molarity formula, we get:

M = n(solute)/v(solution) L

M = 0.800 mol  / 0.250 L

M = 3.2 M

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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The base ionization constant exists as the equilibrium constant for the ionization constant.

The base ionization constant exists as the equilibrium constant for the ionization constant. It is represented as Kb. If the concentration of the solution (C) and the degree of ionization (α)exists known, then the base ionization constant exists measure as follows:

[tex]$K_b=\frac{C \alpha^2}{1-\alpha}$[/tex]

[tex]$K_b=\frac{C \alpha^2}{1-\alpha}$[/tex]

=(0.0800*21%) ²/1-21%

=0.003/1-0.21 =0.0044.

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Incorrect question .

Corrected question- Write the chemical symbol for three different atomic cations that all have 12 electrons.

The number of protons inside the nucleus always remains constant.

∴Chemical symbol of three different atomic cation that have 12 electrons:

Atomic cation is the ion with positive electric charge on it, it means it should have more protons than electrons.

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Al⁺, Si²⁺ ,P³⁺ are the atomic cations with 12 electrons.

∵The nucleus always contains the same number of protons.

∴Three distinct atomic cations with 12 electrons each have the following chemical symbol:

1. Al⁺

2. Si²⁺

3. P³⁺

An ion or atomic cation with a positive electric charge is thought to have more protons than electrons.

• Aluminum (Al) contains 13 electrons, hence Al+ will have = 13 - 1→ 12 electrons (1 electron will be lost for every additional charge).

• Si2+ will have = 14 - 2→ 12 electrons since silicon (Si) has 14 electrons. (+2 charge signifies electron loss of 2);

• Because phosphorus (P) has 15 electrons, P3+ will have 12 electrons because 15-3. (+3 charge indicates that 3 electrons will be lost.)

Hence, Aluminium, Silicon and phosphorus cations have 12 electrons.

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Your question is incorrect. The correct question is -Write the chemical symbols for three different atomic cations that all have 12 electrons.

Compound that would have the highest boiling point is c) CH₃CH₂CH₂CH₂CH₂OH.

Pentan-1-ol (CH₃CH₂CH₂CH₂CH₂OH) is an alcohol with boiling point of 137⁰C.

While boiling, liquid pentan-1-ol is changed into gaseous pentan-1-ol.

Alcohols have higher boiling point than ethers, because it can form hydrogen bonds (see the picture below).

Between molecules of water there are hydrogen bonds, which must be brake so water can evaporate.

Hydrogen bond is an electrostatic attraction between two polar groups in which one group has hydrogen atom (H) and another group has highly electronegative atom such as nitrogen (like in this molecule), oxygen (O) or fluorine (F).

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Answer:

False

Explanation:

A model is a representation of a more complex system.

Answer:

False

Definition:

The scientific model is a condensed depiction of complicated or invisible to the human sight scientific systems, such an atom or a solar system. Although this representation is simplified, it is nevertheless accountable for producing all of the original systems' essence, substance, and behavior. This allows the models to be employed in scientific studies and research and to provide tangible outcomes that accurately reflect the actual systems.

What is a scientific model?

A scientific model is a simplification that roughly represents the real world while making it simple to think about issues, gain clarity and understanding, and perhaps forecast behavior.

Say, "The world is flat!" as an example. Actually, if you were alive 10,000 years ago, this estimate wasn't so awful. In general, everything you see around you suggests that the globe *is* flat, especially if you're living on a large grassy plane. Forget some of the boundary difficulties around the "edge of the globe"; perhaps it just never ends.

Then, though, you could start to see ships if you go to the ocean and stare out across that huge horizon. The sail is shown first, followed by a little portion of the mast, and then the ship's body. Hmm. That must imply that the spacecraft was underneath the earth's "flat surface," or...

The globe that is the earth (Or having a burrito-like form. But for now, let's stick with spherical.) That's fascinating. That would indicate that if I go from one location on Earth to another and keep moving, I would ultimately return to the original location. This proposition is testable!

The Earth is not a perfect spherical, of course. Its core protrudes a little bit. But a sphere is a reasonably good scientific model for the Earth for all everyday practical purposes (with the exception of things like GPS and satellite communications, etc.).

Similar to this, other scientific models should be as straightforward as feasible in order to explain occurrences and offer some level of testable prediction potential.

Thanks,
Eddie

Change in pH is resisted by a buffer on addition of small amount of acid or base.

When a small amount of a strong acid or base is introduced to a buffer, the change in pH does not occur. This is accurate provided that the quantity of strong acid or base supplied does not significantly outweigh the quantity of conjugate base and conjugate acid already in the buffer. The buffering capacity will exceed if an excessive amount of a strong acid or basic is added.

A buffer is a substance that can withstand a change in pH when acidic or basic substances are added. Small additions of acid or base can be neutralized by it, keeping the pH of the solution largely constant. For reactions that call for certain and stable pH ranges, this is significant. The pH range and capacity of buffer solutions determine how much acid or base can be neutralized before there is a change in pH and how much pH will vary.

A buffer is a unique liquid that prevents significant pH level fluctuations. Each buffer that is created has a specific buffer range and buffer capacity. The quantity of base or acid that may be added to a buffer before the pH starts to noticeably shift is known as the buffer capacity.

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The molecular equation for the reaction of aqueous copper(II) chloride and aqueous potassium phosphate:

3CuCl₂(aq) + 2K₃PO₄(aq) → 6KCl(aq) + Cu₃(PO₄)₂(s)

CuCl₂ is the salt copper (II) chloride.

K₃PO₄ is the salt potassium phosphate.

KCl is the salt potassium chloride.

Cu₃(PO₄)₂ is the insoluble salt copper(II) phosphate.

Anhydrous copper(II) phosphate is a blue solid salt.

(aq) is an aqueous solution.

(s) is a solid, insoluble in the water

There are same number of atoms of on both side of the balanced chemical reaction: three copper (Cu), six chlorine (Cl), six potassium (K), two phosphorus (P) and eight oxygen (O) atoms.

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