A 25-gram block of Aluminum has an initial temperature of 35 degrees Celcius. What will be the final temperature of the aluminum block with the addition of 503.38 Joules of heat?

Answer:

69.23g

Explanation:

Find out how many moles is in 9.89g of H2.

number of moles = mass(g) / molar mass

1 is the molar mass of hydrogen (to the nearest whole)

relative molecular mass of H2: 2*1 = 2

number of moles of H2 = 9.89/2 = 4.945

1 mol of H2 is produced from 2 mol of Li

so

4.945 mol of H2 produces 9.89 mol of Li

mass(g) = number of moles * molar mass

7 is the molar mass of Lithium (to the nearest whole)

mass = 9.89 * 7 = 69.23

69.23 grams of Li are needed to produce 9.89 of H2

Answer: 3.0655207907157433

Explanation:

The Boiling point is 345.36 K at 1.332 atm.

What is boiling point?

Organic compounds' boiling points will reveal important information about their structural and physical characteristics. The boiling point of a substance aids in its identification and characterization. A liquid's boiling point is higher under higher atmospheric pressure than it is under lower atmospheric pressure.

What is vaporization  ?

The process of converting a substance from its liquid or solid state into its gaseous (vapour) state is known as vaporization. Boiling is the process of vaporizing a liquid when the environment permits the development of vapor bubbles inside the liquid.

Relationship is between vapor pressure and boiling point and ΔHvap is given by clauses clampy ton.

ln ( p₂/p₁)-  ΔHvap/ R ( 1/ l₂- 1/ T₁)

Now given,

normal boiling point means pressure is 1 atm

P₁= 1atm, T₁= 328k

p₂= 1,32 atm, T₂= ?

ΔHvap= 36.6KJ/ Mol = 36600J/Mol

ln= (1.32/1) = - 36600J/mol/ 8.314 J/Mol.K  (1/T₂- 1/338K)

= 1/T₂- 1/338K = - 6.30664*10⁻⁵ K⁻¹

= 1/T₂ = 2.8955*10⁻³ K⁻¹

T₂= 345.36 K

Therefore, Boiling point is 345.36 K at 1.332 atm.

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Answer: you didn't add much information, but I think it's: in order for a sedimentary rock to be created, the rock must first become sediment.

Explanation: sediment is basically small pieces of rock that have been eroded from their parent rock; and with immense heat and pressure, those pieces will form a sedimentary rock.

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute/volume of solution in litre

Where,

moles= given weight /by molecular weight

         = 0.285 g/ 40

         =0.0071moles

Substituting values in equation 1

Molarity=0.0071/0.350

Molarity=0.020M

Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.

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im not too sure but it should probably be B or D. if not sorry.

Uranium-235 has 92 protons and 143 neutrons. The mystery element based on the image is krypton 89.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

Uranium-235 has 92 protons and 143 neutrons. As an example, two extremely unstable fission fragments, a barium and a krypton nucleus, are produced in many known fission processes of uranium-235 initiated by absorbing a neutron. These pieces very instantly split into barium-144 and krypton-89 after releasing three neutrons each.

Thus, The mystery element based on the image is krypton 89.

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A computer simulation technique called molecular dynamics (MD) examines the actual motions of atoms and molecules. For a predetermined amount of time, the atoms and molecules are allowed to interact, providing insight into the system's dynamic "evolution."

What purposes might molecular dynamics serve?

For big molecules like proteins, molecular dynamics is frequently the approach of choice. It can be used to explore conformational space. In molecular dynamics, the energy surface is investigated by resolving the system's Newton's laws of motion.

How do simulations of molecular dynamics function?

A method for simulating complicated processes on computers that models them at the atomic level is called molecular dynamics. The system's time evolution is tracked by numerically solving the motion equations, which enables the use of "computer experiments" to derive important kinetic and thermodynamic parameters.

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Answer:

It is not possible to determine the type of chemical reaction that will occur when Ca LiOH → without additional information. The chemical formula Ca LiOH could represent a compound, but without knowing what reactants are present and what products are being formed, it is not possible to classify the reaction. Some possible reactions that could occur involving Ca LiOH include a synthesis reaction, where Ca LiOH is formed from its constituent elements, a decomposition reaction, where Ca LiOH breaks down into its constituent elements, or a substitution reaction, where one or more atoms in Ca LiOH are replaced by other atoms.

Explanation:

Higher the value of the principle quantum number to which electron is jumping, longer will be the wavelength. So, n = 6, p = 8 transition produces longest wavelength.

What is Wavelength?

A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles.The wavelength is most frequently described in nanometers (nm), which are units of 10-9 m, or angstroms (), which are units of 10-10 m, for infrared (IR), visible light (UV), and gamma radiation ().

Frequency, which is defined as the quantity of wave cycles per second, and wavelength have an inverse relationship.

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No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.

Pound is a unit for measuring weight. 16 ounces makes one pound.

Ounce is also a unit for measuring weight. 16 ounces is equal to 1 pound

So, for making one small robot we need 4 pounds.

1 pound = 16 ounces

4 pounds = 64 ounces

But, we have 48 ounces

We need more = 64 - 48 = 16 ounces or 1 pound

No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.

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Answer:

White dwarf.

Explanation:

its the most furthest.

According to the given statement the rate law for this reaction. A+2B→AB2 is =k[A][B]

A chemical reaction is a process that permits one group of chemical components to change chemically into another.Chemical reactions, which can frequently be defined by a chemical equation, traditionally include changes that only affect the locations of electron in the formation and dissolution of chemical bonds among atoms, with no changes to the nucleus (no change to the components contained).

Combination or synthesis, decomposition, single displacement, double displacement, and combustion are the five different types of generic chemical reactions.

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The number of moles of sulfuric acid in the solution would be 0.005 mol.

First, the balanced equation of the reaction is as below:

[tex]H_2SO_4 + 2NaOH -- > Na_2SO_4 + 2H_2O[/tex]

From the equation, the mole ratio of sodium hydroxide to sulfuric acid is 2:1. This means that for every 1 mole of sodium hydroxide used in the reaction, 0.5 moles of sulfuric acid is required.

Now, in this case, the indicator changed color after 0.01 mol of sodium hydroxide has been added to the sulfuric acid solution. This means that the reaction has been completed.

With 0.01 mol of sodium hydroxide used, the equivalent mole of sulfuric acid would be:

0.01/2 = 0.005 mol.

In other words, the number of moles of sulfuric acid in the solution would be 0.005 mol.

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The balanced chemical equation in acidic solution is as follows: Cr₂O₇²−(aq) +  3 HNO₂(aq) ⎯→2  Cr₃+(aq) + 3 NO₃−(aq) + 4 H₂O(l).

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

The formula mass of iron(II) chloride is 162.21 g/mol.

According to the reaction, the one mole or 28 g of CO produces one mole or 32 g of methanol. Thus, 16.7 g will produce 19 g of methanol.

Methanol is an organic compound formed by the covalent bonding between carbon and oxygen. Methanol is the basic alcohol.

As per the balanced reaction CO be the limiting reactant. One mole of CO produces one mole of methanol.

molar mass of CO = 28 g/mol

molar mass of methanol = 32 g/mol

28 g of CO produces 32 g of methanol. Hence, mass of methanol produced by 16.7 g of CO is:

= (16.7g × 32 g) / 28 g.

= 19 g.

Therefore, the mass of methanol produced from 16.7 g will be 19 g.

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Butyryl chloride reacts with Grignard reagent, methyl magnesium bromide, to form pentan-2-one. Pentan-2-one reacts with vinyl magnesium bromide to form the final product 3-methylhex-1-en-3-ol.

The following diagram illustrates how butyryl chloride becomes 3-methylhex-1-en-3-ol. conversion of 3-methylhex-1-en-3-ol from butyryl chloride. Tertiary alcohols are produced when carboxylic esters, R'CO2R, combine with two equivalents of an organolithium or Grignard reagent. Two identical alkyl groups are present in the tertiary alcohol (see R) A ketone intermediate is used to carry out the reaction, which is subsequently used to react with the second equivalent of the organometallic reagent. As we've just seen, the ketone undergoes further reactions to create a tertiary alcohol. This explains why, when reacting with esters, two equivalents of Grignard are required. a mechanism The Grignard performs an addition reaction on the ester in the first step, resulting in the formation of C-C and the breakdown of C-O (pi), giving us an intermediate with a negatively charged oxygen.

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The substances Pyruvate and Oxaloacetat, would be glycogenic in mammals, if produced from the catabolism of an amino acid. Correct answer: numbers 2 and 4.

Pyruvate and oxaloacetate are the end products of the breakdown of certain amino acids (glucogenic amino acids) in the liver. These products can be converted into glucose, through a process known as gluconeogenesis. This process allows the body to maintain blood glucose levels even when dietary sources of glucose are not available.

Catabolism of an amino acid refers to the process of breaking down amino acid molecules into simpler molecules, such as:

This process releases energy that the body can use for other metabolic functions.

Which of the following substances, if produced from the catabolism of an amino acid, would be glucogenic (in mammals)?

1. Acetoacetate

2. Pyruvate

3. Acetyl-CoA

4. Oxaloacetate

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A 15.5 gram sample of diphosphorous pentoxide contains 8.74 grams of oxygen (option D)..

A chemical compound is a substance formed by the union of two or more chemical elements in a fixed ratio, the union being a chemical bond.

According to this question, a chemical compound named diphosphorous pentoxide (P₂O₅) is made up of two elements namely: phosphorus and oxygen.

The atomic mass of oxygen in the compound is as follows: 16 × 5 = 80g/mol

Atomic mass of P₂O₅ = 142g/mol

Mass of oxygen = 80/142 × 15.5 = 8.74 grams

Therefore, 8.74 grams is the mass of oxygen in the compound.

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Sulfuric acid, nitric acid, hydrochloric acid, and perchloric acid are all powerful acids, while acetic acid is a milder one. These acids are all included in the option's given list of acids.

What is acid?

When a substance is treated with aqueous solution, acid—which has a pH below 7—releases H+ ions. The acids are divided into two groups based on their dissociation rates: strong acids, which have a high dissociation rate, and weak acids, which have a low dissociation rate.

With the chemical formula CH3COOH, acetic acid is an organic acid. It is an indistinct acid also known as ethonoic acid.

Vinegar gets its distinctive smell from acetic acid, a byproduct of fermentation.

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In the given Galvanic cell, the electrons are flowing from left to right. The Zinc is oxidized into Zn²⁺ ions.

A galvanic cell can be described as an electrochemical cell in which electricity is produced from spontaneous Oxidation-Reduction reactions. Galvanic cells exhibit spontaneous redox reactions but the energy generated from the said reaction.

A common apparatus of the galvanic cell consists of two different metals or electrodes such as Zinc and copper electrodes, each immersed in different beakers containing their respective ion solution. Therefore, the Zinc electrode is placed in ZnSO₄ solution and the copper electrode is placed in CuSO₄ solution.

On the left end, the zinc metal is oxidized into Zn²⁺ ions, and the electrons from the Zinc electrode travel to the copper electrode (right end). The cooper Cu²⁺ ions from the CuSO₄ solution accepts those electrons and deposit as copper metal on the copper electrode.

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3040mmHg pressure is nearly equal to 4 atm.

Atmospheric pressure (atm) is a unit of measurement equal to the mean atmospheric pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). Atmospheric pressure is most often approximated by the hydrostatic pressure caused by the weight of the air above the point of measurement. Air pressure decreases with altitude because as altitude increases, the air above has less mass. Since the atmosphere is thin relative to the Earth's radius (especially in the dense atmospheric layers at low altitudes), the Earth's gravitational acceleration as a function of altitude can be approximated as constant and contributes little to this decline. Pressure is measured as force per unit area in SI units Pascal (1 Pascal = 1 Newton per square meter, 1 N/m²). Atmospheric pressure at sea level is 760 cm Hg.

Given,

3040mmHg pressure

1 mmHg = 0.00131579 atm

3040mmHg = 3040 × 0.00131579 atm

3040mmHg = 4.0000016 atm

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The atomic radius of the gold based on this structure in picometers ia given as:  21.7506

The atomic radius is: The average or normal distance from the nucleus's center to the edge of the surrounding electron shells is what we mean when we talk about an element's atomic radius.

We have the effective number of gold atoms to be 4 in a given unit cell

Then the molar mass of gold is given as 197 g / mol

The relationship between the edge length and the atomic radius is defined mathematically as:

√2a = 4r

make r the subject of the formula

r = √2a / 4

From the question the value of a is given as unit cell edge length of 61.52 pm

We would put this in the formula such that we would have:

r = √2 * 61.52 /4

r = 87.0024 /4

r = 21.7506

The atomic radius is  21.7506

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The molecular geometry of the molecule shown in the image is trigonal planar with three domains.

Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.

It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.

They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.

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Answer:

Chemical symbols are abbreviations that are used in chemistry to shorten names of chemical elements and chemical compounds.

Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.

According to the periodic table the elements which are most active are Li and Na.

Ionic bonding occurs when valence electrons transfer completely between atoms. The metal atoms having low ionization energy, loses electrons and becomes positively charged.

The noble gasses (Group 18) are considered inactive since they already have a stable octet of electrons in their outer shell.

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions.

Therefore, Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity.

According to the periodic table the elements which are most active are Li and Na.

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Answer:

Apple trees bloom in the spring because they require a certain amount of cold weather, known as chill hours, in order to break dormancy and produce flowers. In most regions where apple trees grow, the temperatures during the springtime provide the ideal conditions for the trees to bloom. During the summer, apple trees are focused on growing and ripening their fruit, rather than producing flowers. In some cases, apple trees may produce a small number of flowers during the summer, but this is not the norm. The exact amount of chill hours that apple trees need can vary depending on the specific variety of apple tree, as well as the region where it is grown.

Explanation:

Answer:

Drought may trigger out-of-season blooming

Many trees and shrubs that flower in early spring, like apples and lilacs, form their buds during the preceding summer. When spring breaks the plant's dormancy, the buds burst open and bloom.

The element that is most likely to lose electrons when forming an ion is zirconium, Zr.

The correct option is D.

Metals are elements that form positive ions by the loss of electrons.

Hence, metals are electropositive elements.

Some examples of metals are sodium, potassium, calcium, zirconium, etc.

The physical properties of metals include:

The chemical properties of metals include their ability to react with dilute acids to produce hydrogen gas.

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Answer:

The answer to your question is ⇔ arctic air mass

Explanation:

I hope this helps and have a wonderful day!