find the calories lost by 50 g of hot water starting at 90 degrees celsius when mixed with 50 grams of cold water starting at 23 degrees celsius, and the final temperature of the mixture is 57 degrees.

It has a tetrahedron shape, etc. Tetrahedral in form and with a positive charge on the phosphorus atom, PF4+ has a Lewis structure.

A triangular bipyramid formation is a molecular shape in chemistry that has one atom in the middle and five additional atoms at each of its four corners. The bond angles in a tetrahedral structure with a central atom are around 109.5 degrees IF5 is shaped like a square pyramid, whereas PCl5 is a trigonal bipyramid.

There is no electron lone pair on the phosphorus atom in the PH+4 ion. Tetrahedral in shape, it has a bond angle of 10928′.

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You have solid chemicals more than you what you need. You should: call 1-800-222-1222

Salts, mica, and diamond are a few examples. Metals: Elements and alloys make up solid metals, such as silver (e.g., steel). Generally speaking, metals are brittle, malleable, ductile, and good heat- and electricity-conductors. Ceramics: Ceramics are inorganic compound solids, typically oxides.

Call 1-800-222-1222 to talk with a regional poison control center in the United States. Calling this hotline number can connect you with poisoning specialists. They will provide you with more details. If you have any inquiries regarding poisoning, overdose, or overdose prevention, you should dial.

Never put used chemicals back in their containers. By doing this, you will contaminate it. Put the leftovers in the appropriate "waste container" for disposal.

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Answer:

Heat capacity depends upon the mass of the substance, hence it an extensive property

(. ❛ ᴗ ❛.)

Answer:

2 Cu + O2 → 2 CuO

Explanation:

Sorry if I am wrong

When 20.87 g of propane is combusted in excess oxygen 62.577g of co2 are produced and 75.89grams of o2 are consumed

What are combustion reactions?

combustion is a chemical reaction between two or more chemicals, usually involving oxygen, that produces heat and light in the form of a flame. When a material reacts quickly with oxygen, a combustion reaction happens (O2).

During the combustion of propane the following reaction occurs:

C3H8(g)+5O2(g)→3CO2(g)+4H2O(l)

We know that the combustion of 1 mole of propane gives 3 moles of carbon dioxide.

= 20.87 g/44.10⋅g⋅mol−1=0.473⋅mol

And since, per the stoichiometric equation, if 0.200⋅mol propane is completely combusted, 3×0.473mol×44.10⋅g⋅mol−1=62.5779g

Oxygen consumed can be considered as x

44x=20.87x160=75.89g

Therefore when 20.87 g of propane is combusted in excess oxygen 62.577g of co2 are produced and 75.89grams of o2 are consumed.

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[Mg(HSO4)2] is the formula for magnesium hydrogen sulfate.

Hexamethyldisilazane (HMDS) has been used to mildly produce trimethylsilyl (TMS) ethers from a variety of primary, secondary, and tertiary aliphatic alcohols, aromatic alcohols, and oximes in the presence of magnesium hydrogensulfate [Mg(HSO4)2], a heterogeneous solid acid catalyst.

Additionally, under solvent-free conditions, 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthene derivatives were produced quickly in the presence of Mg(HSO4)2 in high to exceptional yields.

Some linear and cyclic aromatic acetals have been created using a reusable catalyst made of magnesium hydrogen sulphate in an environment devoid of solvents.

The features of this ecologically friendly method—such as its high product yield, straightforward work-up process, and avoidance of organic solvents—will help it immensely in its role as a green process.

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When pieces of two ionic compounds switch places to create two new compounds, it is called a double replacement reaction also known as a double displacement, exchange, or metathesis reaction

One in which one reactant is only partially replaced by another is referred to as a twofold displacement reaction.

A list of double reactions is provided below:

AB = CD + CB + CD + AD

A twofold replacement process involves exchanging the same ions from two reactant ionic bonds for two new product compounds.

Two reactants transfer cations or anions to create two new products in a double replacement reaction.

Metathesis reactions double and displacement reactions are additional names for dual replace procedures.

Double replacement reactions include, but are not limited to, precipitation, gas production, and neutralization.

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From following compound F₂ , CsBr, CN, Nb. The compound that's considered as an atomic solid is  Nb. the correct answer is D.

Atoms of an element must be bound to other atoms of the same atom type in order for a substance to be considered an atomic solid.

Hydrogen and fluorine gases, abbreviated H₂ and F₂, are present at normal temperature. Atomic solids include things like pure metals, silicon crystals, and diamond. Atomic solids known as network solids have covalent bonds between their constituent atoms.

The atomic number 5 and symbol of the chemical element boron are B. In its solid state at ambient temperature is the metalloid boron.While some would refer to it as a molecule, it is essentially a concoction of atoms and not an atom. The most common ingredient in air, N2, is a gas, as can be seen by looking at it. So, that is not a solid. A diatomic gas is element 35, bromine (Br).

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A constant current is passed through an electrolytic cell containing molten MgCl₂ for 12.8 h. if 3.64 g of mg(s) is produced .The  magnitude of the current that was passed through the cell is

given that :

T = 12.8 hr = 46080 sec

Mass = 3.64 g

molar mass = 24.305 g /mol

the moles = mass / molar mass

                 = 3.64 / 24.305

                 = 0.149 mol

moles = Q / ZF

where,

Q = charge

Z = no. of electrons

F = faraday constant = 96485 C

moles = Q / ZF

Q = 0.149 × 2 × 96485

Q = 28752.53 C

the current is given as :

Q = I T

I = Q / T

I = 28752.53 / 46080

I = 0.62 A

Thus, the current is 0.62 A.

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From the samples on the slide made up of tiny cells, Terry can conclude that the cells were produced by other cells.

Cell production occurs often in a human protein, such as yeast, bacteria, or mammalian cells in culture, which then start producing the protein in large quantities. A new organism is created during the process of splicing a gene into a production cell.

Cells are often produced from other cells by the process of replication. All living things, from microorganisms to humans, rely on cells for structure and function. Scientists regard them as the tiniest form of life. Cells contain the biological machinery that produces the proteins, chemicals, and signals that are responsible for everything that occurs within our bodies.

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The correct statements are thus: bonding forces are typically much stronger than intermolecular forces, intermolecular forces involve partial or small charges that are far apart and are relatively weak, and for molecular substances, the strength of the intermolecular forces determines the physical properties of its phases.

When two or more atoms, molecules, and ions join together chemically to form a compound, this process is known as chemical bonding. These chemical bonds hold the atoms in the resulting molecule together.

The four main types of bonding—ionic, covalent, metallic, and molecular—are discussed in this section. Ice is a different kind of solid that plays a significant role in a few crystals.

To form bonds, atoms exchange or trade their valence electrons. The electrons in an atom's outermost energy level known as valence electrons have the potential to interact chemically. All chemical bonds are built on valence electrons.

The simplest explanation is that atoms are attempting to achieve the most stable (lowest-energy) state possible. Many atoms become stable when they satisfy the octet rule or have their valence shell completely filled with electrons.

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Titanium's neutral atoms have the electronic configuration 1s²2s²2p⁶3s²3p⁶3d²4s². The orbital diagram for a neutral atom of titanium is attached below: the correct answer is the last option.

The electron configuration can explain how electrons will be arranged in an element's atom's energy levels. The number of electrons in a specific energy level is expressed in the electron configuration of an atom as a superscript of electron-containing subshells.

The formula  2n² determines the primary quantum number (n), which controls the maximum number of electrons that can fit into an electron shell. titanum have 5 orbital. The orbital diagram shown below

The titanium atom has an atomic number of 22 and an electronic configuration of1s²2s²2p⁶3s²3p⁶3d²4s².

your question seems incomplete because of missing the diagram but most probably your full question was attached below

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Water is considered to be electronegative because oxygen is more electronegative than hydrogen.

Water is made from two hydrogen atoms and one oxygen atom. hen determining the electronegativity of both these atoms, we find that the electronegativity of oxygen is approximately 3.5 whereas the electronegativity of hydrogen is 2.1

Hence, as oxygen has a greater electronegativity than the positive hydrogen atoms, the overall water compound is considered to be electronegative.

If the electronegativity of hydrogen would have been greater, then water would not be an electronegative compound.

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One carbon atom and four oxygen atoms make up the negatively charged compound perchlorate. This molecule has four oxygen atoms covalently bound to the central chlorine atom, which is in the +7 oxidation state.

As a result, there are 4 bond pairs and no lone pairs on the central chlorine atom.

Therefore, the perchlorate ion possesses a tetrahedral geometry according to the VSEPR theory. The perchlorate ion's optimum bond angle is therefore 109.5°.

Perchlorate's real bond angle and ideal bond angle are nearly identical. This is because all of the chlorine-oxygen bonds in perchlorate are equal because it has been resonance stabilized.

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Surface tension is amount of energy required to increase surface area of liquid, surface tension is the result of a net downward and inward force and polar liquid will have a higher surface tension than nonpolar liquid.

The tendency of liquid surface at rest to shrink into the minimum surface area is called as surface tension. It allows objects with a higher density than water such as razor blades and insects to float on water surface without becoming submerged.

Besides mercury, water has the highest surface tension for all liquids, which is due to the hydrogen bond in water molecules.

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Answer:

moving around

Explanation:

The answer is essentially:

No. Life would be no different if electrons were positively charged and protons were negatively charged. Opposite charges would still attract, and like charges would still repel.

The molarity of the sulfuric acid from a 15ml sample of an electroplating solution is 1.022 M

It is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

How to calculate the molarity of the sulfuric acid?
Based from the rule of acidimetry and alkalimetry

The formula is :
V₁ * S₁ = V₂ * S₂

where
V₁ = 15ml

V₂ = volume of alkali solution = 52.6ml

S₁ = strength of acid solution in normality = unknown

S₂ = strength of alkali solution in normality = 0.583M (Because NaOH normality and molarity has the same value)

Now, let's go back to the formula

15 * S₁ = 52.6 * 0.583

S₁ = 30.6658 / 15

= 2.044N

The molarity of the sulfuric acid is

2.044 / 2 = 1.022 M H₂SO₄ (divided by 2 because H₂SO₄ is a dibasic acid)

So the molarity of sulfuric acid is 1.022 M.

This question is incomplete, The complete question is as follows :

a 15.0-ml sample of an electroplating solution is analyzed for its sulfuric acid concentration (H₂SO₄). it takes 52.6 ml of the 0.583 M NaOH to neutralize the sample. find the molarity of the sulfuric acid.

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concentration of the acetone immediately after mixing

We are given:

- Molarity of Acetone[tex]$=4.0 \mathrm{M}$,[/tex]

- Volume of Acetone[tex]$=11 \mathrm{~mL}=0.011 \mathrm{~L}$,[/tex]

- Volume of[tex]$B r_2=16 \mathrm{~mL}$,[/tex]

- Volume of [tex]$\mathrm{HCl}=11 \mathrm{~mL}$[/tex], and

- Volume of Water[tex]$=16 \mathrm{~mL}$.[/tex]

therefore Total Volume of Solution[tex]$=(11+16+11+16) m L=54 m L=0.054 L$[/tex]and

Total No. of moles [tex]\mathrm{M} \times 0.011 \mathrm{~L}$$=0.044 \mathrm{~mol}$[/tex]of Acetone = Molarity of Acetone [tex]$\times$[/tex] Volume of Acetone i =4.0

[tex]$\therefore$ Molarity of Acetone $=\frac{\text { No. of moles of Acetone }}{\text { Volume of solution in liter }}$[/tex]

[tex]$=\frac{0.044 \mathrm{~mol}}{0.054 \mathrm{~L}}$$=0.815 M$Hence, Concentration of Acetone (in Molarity) is $0.815 \mathrm{M}$.[/tex]

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Miller -Urey experiments was an investigation for the components that made life on earth. The experiment used water, methane gas, ammonia and hydrogen gas. These compounds were cooled settled on the trap where they formed macromolecules latter called amino acids.

The Miller-Urey experiment was carried out to gather data pertaining to the topic of how life first developed on Earth. The experiment used a device with a number of flasks and tubes that pumped materials that were said to be part of the initial or early atmosphere of Earth.

The methane, ammonia, and hydrogen gases were all added to a glass flask that held 5 liters and was connected in two directions to a system of tubes that also held a 500 milliliter flask that contained some water In this flask, electrodes produced electrical sparks to a mixture of gases and water vapor in order to mimic the lighting in the Earth's early atmosphere.

The cooling process results in a mixture of hydrogen, ammonia, methane, and water vapor. All the components finally settled into the trap at the bottom of the system and they are found to form macromolecules.

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CH3NH2 + HOH ==> CH3NH3^+ + OH^-Which molecule/ion accepts a proton. That is the base. Which molecule/ion donates a proton. That is the acid.

A stable subatomic particle known by the symbol for "proton"

e elementary charge, p, H+, or 1H+ having a positive electric charge. Its mass is 1,836 times greater than an electron's mass and just a little bit less than that of a neutron (the proton–electron mass ratio). "Nucleons" refers to protons and neutrons together, each of which has a mass of roughly one atomic mass unit (particles present in atomic nuclei).

Each atom. has a nucleus. that contains one or more protons. In order to keep the atomic electrons bound, they offer the central attractive electrostatic force. An element's defining characteristic, known as the atomic number, is the number of protons in the nucleus (represented by the symbol Z)

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The orbital diagram of magnesium (Mg) shown below:

The electrons in an atom are depicted in orbital diagrams in visual form. For creating orbital diagrams, three guidelines are helpful. Each electron resides in the orbital with the lowest energy, in accordance with the Auf Bau Principle. There may be only two electrons in a single orbital, according to the Pauli Exclusion Principle.

An orbital diagram, often known as an orbital box diagram, is a visual representation of an atom's electron arrangement. The electrons occupying the orbitals are shown as arrows (or half-arrows).

Mg have 12 electrons in the neutral atom

so the electronic configuration of the Mg is: 1s² 2s² 2p⁶ 3s²

orbital diagram is as follows:

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It would take 345.7 minutes in a plate.

Justification: It serves as an illustration of Faraday's First Law of Electrolysis.

According to this, the quantity of material deposited is directly inversely related to the quantity of voltage transmitted.

W=Zit, =E/96500, = E it/96500, and E=58.7 (molar mass of Ni)/2 (charge on Ni)=29.3 t=W96500/E I = 29.6x96500/29.3x4.7, = 20742.1 sec, = 345.7 min.

It is the fifth most prevalent element on earth and is widely distributed throughout the crust and core of the planet. Along with iron, nickel is a frequent metal in meteorites and is also present in trace amounts in saltwater, plants, and animals.

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Option C) provides a useful definition of chemistry.

The science that strives to comprehend how molecules interact in order to improve human control over nature is a solid way to define chemistry. the branch of science that examines how molecules interact with atoms to provide insight into the workings of the cosmos.

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A solutions of 0.100-m benzene would yield 100.0 ml when 76.0 ml of benzoic acid was added,

Due to its significant antibacterial action at pH 2.5 to 4.0, benzoic acid (BA) is a frequently used antimicrobial preservation in food and beverages, particularly carbonated ones. Bacteria and yeast growth, a major contributor to food spoiling, is inhibited by BA.

Under typical circumstances, benzoic acid is both non-toxic and stable. Benzoic acid may still constitute a health concern, even though occupational exposure levels have not been determined, hence safe work procedures should always be followed: After handling, wash your hands thoroughly. Use just where there is good ventilation.

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There are 8 electrons from each oxygen atoms. Hence oxygen molecule contains a total of 16 electrons in which 10 are bonding and 6 are antibonding electrons.

According to the molecular orbital theory, atomic orbitals overlaps to form molecular orbitals. Molecular orbitals are of different identity from that of atomic orbitals. There are both bonding and antibonding molecular orbitals.

The molecular orbital electronic configuration of oxygen molecule is written as :

[tex]\sigma 1s^{2} , \sigma^{*} 1s^{2}, \sigma 2s^{2} ,\sigma^{*} 1s^{2} , \pi2px^{2}, \pi2py^{2}, \sigma 2pz^{2}, pi2px^{1}, \pi2py^{1}[/tex].

There are total 16 electrons in which 10 are in bonding electrons and 6 are non-bonding electrons.

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The relationship between a solution's boiling point and its ion production is direct. BaCl2 has the highest boiling point because it produces the most ions.

Why does water boil?

A liquid's boiling point changes depending on the pressure being applied; the normal boiling temperature is the point when the air pressure at sea level is equal to the vapour pressure.

What does boiling point mean in a nutshell?

the point at which a liquid's vapor pressure equals the atmosphere's pressure on it; for water at water level, this temperature is 212°F (100°C). Shorthand: b.p. 2.

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The molecular weight of the solid acid in units of g/mole is 25 g/mol

given that :

mass of the solid acid =0.630 g

volume = 40.4 mL = 0.04 L

moles =  molarity × volumes in liter

moles = 0.630 × 0.04 L

          = 0.0252 mol

the molar mass formula is given as:

molar mass = mass / moles

molar mass = 0.630 g / 0.0252 mol

molar mass = 25 g/mol

Thus, carrying out an experiment to determine the mw of a solid acid with the generic formula H₃A. you weigh out 0.630 g of the solid acid in a weigh boat and transfer it to a 125 ml Erlenmeyer flask. after dissolving the acid in 25 ml of distilled water, you add 15.44 ml of 0.335 m Sr(OH)₂(aq) solution . the molecular weight of the solid acid in units of g/mole is 25 g/mol.

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Answer:

 In the presence of heat, sodium bicarbonate, NaHCO3, decomposes to produce carbon dioxide, CO2, which results in the balanced reaction of 2 NaHCO3(s) + Na2CO3(s) + H2O(l) + CO2(g). In addition to its many uses, sodium bicarbonate can be utilized as a leavening agent while making doughnuts and quick bread, for example.

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C. 0.1 M barium chloride following would produce maximum elevation in boiling point

Because both the hydroxyl and carboxylic acid groups might take part in intermolecular hydrogen bonding, compound IV would have the greatest boiling point. Additionally, compound IV exhibits stronger dipole-dipole attraction due to its increased polarity (more polarized carbon-oxygen bonds).

The element with the lowest temperature at which an element would smolder is helium, while the element with the highest temperature is tungsten. The melting point is measured in degrees Celsius (C).

The most particles will be produced by BaCl2 after dissociation. Consequently, it causes the greatest rise of boiling point.

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