Every morning, Jeremiah uses a blender to make a smoothie for breakfast. Which of the
following shows the energy transformation that the blender demonstrates?
А
Electrical - light
B
Chemical → mechanical
с
Mechanical → chemical
D
Electrical mechanical

Answer: 4

Explanation: because the zero doesn't count

We can apply the concept of heat transmission to determine the water's final temperature. The heat acquired by the water offsets the heat lost by the metal.

Given: 200 g for the mass of water (m).

Water's initial temperature (T1) is 50 °C.

(Q) = 8400 J of heat is transferred from metal to water.

Water has a specific heat capacity (C) of 4.18 J/(g°C).

The following formula can be used to determine the heat transferred:

Q = m * C * ΔT

We may calculate the temperature change (T) by rearranging the equations as follows:

ΔT = Q / (m * C)

replacing the specified values:

T is equal to 8400 J / (200. g * 4.18 J/(g°C))

ΔT ≈ 10.048 °C

We multiply the original temperature by the temperature change to obtain the final temperature (T2):

T2 = T1 + T + 10.048 °C T2 = 50 °C + 10.048 °C

T2 ≈ 60.048 °C

As a result, the water's final temperature is around 60.048 °C.

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If 9.8 g of sulfuric acid is dissolved in excess quantity moles of hydrogen ion is 0.1, 0.2. The correct option is A.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

Molar mass H₂SO₄ = 98 g/mol

9.8 g H₂SO₄ = 0.1 mol

H₂SO₄ produces 2 H+ ions

Therefore, [H+] = 0.2 M

Number of H+ ions = 0.2 x 6.022 x 10²³ = 1.20 x 10²³ H+ ions

H₂SO₄ dissociates in 2 steps

The first dissociation is complete because H₂SO₄ acts as a strong acid here

H₂SO₄ → H+ + HSO₄-

Thus, the 0.1 mol H₂SO₄ will produce 0.1 mol H+ and the moles of sulfate ion is 0.2. The correct option is A.

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According to the information provided, there are 8.601024 8.60 10 -24 ammonia molecules in a solution of water and ammonia (NH3 N H 3). The total number of hydrogen atoms inside the solution is 1.06 1026.

Water has the chemical formula H2O, which stands for two moles of hydrogen and one mole for oxygen. Consequently, there are two moles of hydrogen in a single water molecule. 18 g if water will have 1 x 12.046 1023 = 12.046 1023 hydrogen atoms.

According to Avogadro's number, there's many 6.022 x 1023 water molecules in a mole of water. After determining that a drop of water has 0.002775 moles, we can now calculate how so many molecules are present in it: molecules inside a water drop Equal (6.022 x 1023 particles) x 0.002275 moles.

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Gold's atomic construction is bigger than tin because of the existence of more protons and neutrons.

The disposting of atoms in gold follows what's called a "​face-centered cubic" (fcc) structure. Put directly, the atoms in gold form cubes, with an atom at each of the districts, and another atom in the center of each of the faces (you can see what this looks like in the image below). Gold is an element.

An atom of gold carries 79 protons, 79 electrons, and (most commonly) 118 neutrons, making it among the dense of naturally happen. Gold is a chemical element with 79 protons in each atomic nucleus. Every atom carrying 79 protons is a gold atom and all gold atoms.

So we can conclude that gold has the chemical formula Au. Gold atoms join together in a giant metallic structure. Atomic Structure.

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The substance that changed phase would have less heat capacity than the other thus the bonds in it were broken more easily.

We have to note that the phase change has to do with the conversion of a liquid to a solid or the conversion of a liquid to a gas. A phase is essentially a  given state of matter.

In the case of the question that we have here, we are told that the two substances that are tested are liquids. It is now clear that the substance that changed phase would have a lower heat capacity.

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The thinner and denser layer labelled "2" in the diagram represents the marine crust, while the thicker and less dense layer labelled "1" represents the continental crust. Therefore, A. 1; 2 is the right response.

The land on Earth is made up of the continental crust, which is less dense, thicker (between 35 and 70 km), and primarily composed of the rock granite. The majority of the ocean is made up of oceanic crust, which is denser, thinner (5–7 km), and primarily composed of the rock basalt.

With a density of around 2.7 grammes per cubic cm, continental crust has a largely granitic composition and is slightly lighter than Oceanic crust has a density of roughly 2.9 to 3 grammes per cubic centimetre and is composed of basalt, which is richer in iron and magnesium than granite.

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Answer:

0.15 mg/L

Explanation:

Decay is a first order process so;

ln[A] = ln[A]o - kt

[A]o = initial concentration = 0.5 mg/L

[A] = concentration at time t

t = time taken = 1 day = 24 hours

k = decay constant = 0.05/hr

ln[A] = ln(0.5) - 0.05(24)

ln[A] = -0.693  - 1.2

ln[A] = -1.893

e^ln[A] = e^-1.893

[A] = 0.15 mg/L

Chemical elements of chemical compounds help compensate substances, which are made up of one or more reactants (also known as reactants) and one or more products (also known as products).

Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance.These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.

An alteration of one or more compounds as one or more unique and fresh substances is referred to as a chemical change or chemical reaction.In those other terms, a chemical is an atomic rearrangement-based chemical process.

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Answer:

they physical quantities that are uneffected by changes to a vector space basis

Answer:

lungs

Explanation:

Answer:

B.K2(OH)2 i think that is the answer

Answer:

the nucelolo is not part of the atom

Explanation:

The nucleolus is NOT a part of the atom. The nucleolus has its definition in biology as an element of the cell.

Let's remember that the atom is made up of three fundamental elements that are: electrons, protons and neutrons. Protons and neutrons are found in the nucleus while electrons are orbiting around the nucleus.

Answer:

core

Explanation:

there is no such thing as a core in an atom.

The middle is known as the nucleus

Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.

The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.

The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.

Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.

The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.

It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.

In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.

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The isotopes of bromine from the options would be Z = 35,  A = 79.

Isotopes are atoms of the same element with the same atomic number but different neutron numbers.

The atomic number of an atom is the number of protons present in the nucleus of the atom. Since elements are arranged according to their atomic number on the periodic table, isotopes of the same element will occupy the same position on the periodic table.

Now, considering the isotope of bromine (Br). The atomic number is 35. The atomic number is denoted as Z on the periodic table. The normal bromine atom has a mass number of 80. With 35 as the number of protons, the number of neutrons can be calculated as:

80 - 35 = 45.

Considering an atom with Z = 35, A = 79, means the atomic number is 35, which means it is a bromine atom. The mass number is 79 instead of 80.

79 - 35 = 44.

This means that the atom has 44 as the neutron number instead of 45. Thus, Z = 35, A = 79 is the only isotope of bromine.

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In an acetic acid solution:

1. To make a buffer with pH = 5.00, have a ratio of

\(\frac{[A-]}{[HA]} = 10^{-5.50}\) = 0.316.

The volume of sodium hydroxide needed:

V(NaOH) = (0.316 M - 0.200 M) / 4.50 M = 0.0316 L = 31.6 mL

Therefore, 31.6 mL of 4.50 M sodium hydroxide must be added to 250.0 mL of 0.200 M acetic acid solution to make a buffer with pH = 5.00.

2. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.76 + log(0.2/0.1)

= 4.86

Therefore, the pH of the buffer is 4.86.

3. The mass of salt that must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87:

\(\frac{[A-]}{[HA]} = 10^{-4.87}\) = 0.0114

Therefore, the mass of acetate that must be dissolved:

Mass of acetate = (0.0114 mol dm³)(0.25 dm³) = 0.00285 g

Therefore, 0.00285 g of sodium propanoate must be dissolved in 0.25 dm³ of 1 mol dm³ propanoic acid to give a buffer of pH 4.87.

4. The pH of the buffer is calculated as follows:

pH = pKa + log(\(\frac{[A-]}{[HA]}\))

= 4.74 + log(0.1/0.1)

= 4.74

Therefore, the pH of the buffer is 4.74.

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If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.

If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.

The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.

To ensure spontaneity at all temperatures, two conditions must be met:

ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.

ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

0.295 mol/L

Explanation:

Given data:

Volume of solution = 3.25 L

Mass of BaBr₂ = 285 g

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Number of moles of solute:

Number of moles = mass/ molar mass

Molar mass of BaBr₂ = 297.1 g/mol

Number of moles = 285 g/ 297.1 g/mol

Number of moles= 0.959 mol

Molarity:

M = 0.959 mol / 3.25 L

M = 0.295 mol/L

Answer:

A o2

Explanation:

edge 2020

The compound contains only nonpolar covalent bond is oxygen. Therefore, option A is correct.

When the electrons are shared equally between the two atoms there is the formation of non polar covalent bond. By equal sharing of electron non polar covalent bond are produced.

The oxygen atoms have neutral charge. The oxygen molecule in the has two nonpolar bonds present in their structure. The two oxygen nuclei have an equal force of attraction between them for their four shared electrons.

The oxygen molecule is nonpolar because the electrons are equally divided between the two oxygen atoms. Two oxygen molecule share equal number of electrons. These materials split electrons in the same way as carbon and hydrogen atoms shared, therefore non polar covalent bond formed.

Thus, option A is correct.

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Reaction 1

Solid sulfur can be represented by S(s) and solid iron is represented by Fe(s). Note the little s stands for solid.

Iron(III) sulfide will have the following formula:

Reaction 2

Hyrogen gas can be represented by H2(g) and Iron (III) Oxide will have the following formula:

The products are H2O(l) and Fe(s). Therefore:

Reaction 3

Magnesium metal can be representd as Mg(s) and hydrochloric acid is HCl. Magnesium chloride will have the following formula:

Therefore, the equation can be writen as:

Reaction 4

Magnesium sulfide has the following formula:

The reaction can be writen thus as:

Reaction 5

Oxygen gas can be represented as O2(g) and solid copper as Cu(s). Copper (II) oxide has the following formula:

The reaction can be writen thus as:

A rainbow is produced through a proces that includes refraction, reflection, and dispersion of  sunlight.

A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.

The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.

The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.

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Answer:

The total pressure of a mixture of gases can be defined as the sum of the pressures of each individual gas: Ptotal=P1+P2+… +Pn. + P n . The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.

The new volume of a sample of gas that initially has a pressure of 3.2 atm and a volume of 345 ml is 120mL.

How to calculate volume?

The volume of a sample of gas can be calculated using the following formula:

P1V1 = P2V2

Where;

P1 = initial pressure

P2 = final pressure

V1 = initial volume

V2 = final volume

3.2 × 345 = 9.2 × V2

1104 = 9.2V2

V2 = 1104/9.2

V2 = 120

Therefore, the new volume of a sample of gas that initially has a pressure of 3.2 atm and a volume of 345 ml is 120mL.

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Answer:

Explanation:

1. Identify the elements present in the compound. The compound N2O3 contains two elements: nitrogen (N) and oxygen (O).

2. Determine the type of compound. N2O3 is an ionic compound, as it contains two different elements.

3. Write out the full name of the compound. The full name of the compound is dinitrogen trioxide.

4. Identify the subscripts. The subscripts indicate the number of atoms of each element in the compound. In this case, there are two nitrogen atoms (N2) and three oxygen atoms (O3).

5. Assign the proper name. The proper name for N2O3 is dinitrogen trioxide.

Answer:

Explanation:

Mg + HCI ---> H2 + MgCl2

Solution,

1 Mg + 2 HCl ---> 1 H2 + 1 MgCl2

So the coefficients needed to balance in order are:-