1 point If the boy is pushing with 50N of force and the static friction resistance is 70N of force, what will happen? *​

Answer:

0.012 M

Explanation:

Step 1: Given and required data

Step 2: Calculate the moles (n) of solute (KCl)

We will use the following expression.

n = m/M = 0.64 g / (74.553 g/mol) = 8.6 × 10⁻³ mol

Step 3: Calculate the molar concentration (C) of the solution

The molarity is equal to the moles of solute divided by the liters of solution.

C = 8.6 × 10⁻³ mol/0.725 L = 0.012 M

Answer:

\(\huge\boxed{\sf M_2 \approx 0.38 \ M}\)

Explanation:

Initial volume = \(V_1\) = 55.5 mL

Initial Molarity = \(M_1\) = 1.3 M

Final volume = \(V_2\) = 188.5 mL

Final Volume = \(V_2\) = ?

\(M_1V_1 = M_2V_2\)

Put the given data.

Finding new molarity.

\((55.5)(1.3)=(188.5)(M_2)\\\\72.15 = 188.5 (M_2)\\\\Divide \ both \ sides\ by \ 188.5\\\\72.15/188.5 = M_2\\\\M_2 \approx 0.38 \ M\\\\\rule[225]{225}{2}\)

Answer: Colloids

Explanation: they can not be separated easily but scatter light

The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

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Ai. The car's initial kinetic energy is 22657.94 J

Aii. The car's initial potential energy is 939960.1 J

B. The car's final kinetic energy is 171420.38 J

C. The car's change in kinetic energy is 148762.44 J

Ai. How do I determine the car's initial kinetic energy?

We can obtain the initial kinetic energy of the car as illustrated below:

KE₁ = ½mu²

KE₁ = ½ × 566.99 × 8.94²

KE₁ = 22657.94 J

Aii. How do I determine the car's initial potential energy?

The car's initial potential energy can be obtained as shown below:

PE₁ = mgh

PE₁ = 566.99 × 9.8 × 169.164

PE₁ = 939960.1 J

B. How do I determine the car's final kinetic energy?

The final kinetic energy of the car can be obtained as illustrated below:

KE₂ = ½mv²

KE₂ = ½ × 566.99 × 24.59²

KE₂ = 171420.38 J

C. How do I determine the car's change in kinetic energy?

The change in the kinetic energy of the car can be obtained as follow:

ΔKE = KE₂ - KE₁

ΔKE = 171420.38 - 22657.94

ΔKE = 148762.44 J

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Answer:

conserved or created/destroyed. We can say that throughout the reaction mass is conserved.

For a chemical reaction in a closed system, mass Connot  be  or destroyed . We can say that throughout the reaction mass is conserved .

During a chemical reaction, atoms are rearranged and bonded together in new combinations, forming different substances. However, the total number of atoms remains the same. This means that the total mass of the reactants must be equal to the total mass of the products.

The law of conservation of mass is based on the principle that atoms are neither created nor destroyed during a chemical reaction. Instead, they are rearranged and redistributed into different chemical species.

It is important to note that while mass is conserved, the substances involved in the reaction may undergo changes in physical state (solid, liquid, gas) or experience changes in energy, such as the release or absorption of heat. These changes do not affect the total mass of the system.

In summary, for a chemical reaction in a closed system, mass cannot be created or destroyed. The law of conservation of mass states that the total mass of the reactants is equal to the total mass of the products, and throughout the reaction, mass is conserved.

This principle is a fundamental concept in chemistry and plays a crucial role in understanding and balancing chemical equations.

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Answer:

What are the physical and chemical properties of water?

ans: Water, also known as H2O, is a substance composed of the chemical elements hydrogen (H2) and oxygen (O2). As the polar inorganic compound, water is a colorless, tasteless and odorless liquid. Water being the most studied chemical compound, is known as the universal solvent.

How are the properties of water important to the planets dynamics?

ans: Water movement causes weathering and erosion, changing landscape features. Complex interactions determine local weather patterns and influence climate, including the role of the ocean. The planet's dynamics are greatly influenced by water's unique chemical and physical properties.

The correct option C. 25.0%. The percentage by mass of cesium Cs in the sample is found as 25%.

Mass percent = mass of solute/ mass of solution

mass percent = mass of solute/ mass of solution * 100 %

mass percent = 100/ 400 *100%

mass percent = 25%

Thus,  the percentage by mass of cesium Cs in the sample is found as 25%.

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Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

The chromium ions with a +3 oxidation state are reduced to chromium atoms with an oxidation state of 0.The reduction of Cr^3+ to Cr in this chemical equation is an example of a reduction reaction.

The chemical equation Cr^3+ + 3e^- = Cr represents the reduction of chromium ions (Cr^3+) to elemental chromium (Cr). In this reaction, the chromium ions gain three electrons to form neutral chromium atoms. Reduction reactions involve the gain of electrons and a decrease in the oxidation state of an element.

During the reduction process, the chromium ions are undergoing a change in their electronic configuration, gaining three electrons to achieve a stable configuration. This reduction reaction typically occurs in the presence of a reducing agent that donates electrons, allowing the chromium ions to be reduced. By gaining three electrons, the chromium ions are reduced to their elemental form, which has a neutral charge and an oxidation state of 0.

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29,769.95g of carbon dioxide can be removed.

1st) It is necessary to write the balanced chemical reaction:

According to the balanced equation, 1 mole of carbon dioxide (CO2) can be removed by producing 1 mole of lithium carbonate (Li2CO3).

Using the molar mass of carbon dioxide and lithium carbonate we can convert moles into grams:

- CO2 molar mass: 44 g/mol

- Li2CO3 molar mass: 73.9 g/mol

With the molar mass we can see that 44g of carbon dioxide (1 mole) can be removed by producing 73.9 g of lithium carbonate.

2nd) Now we can calculate the amount of carbon dioxide that can be removed from the breathing environment if the scrubber reaction produces 50.0 Kg of Li2CO3, using a mathematical rule of three:

Here, it is important to convert the grams of Li2CO3 to kg before doing the calculus.

So, 29,769.95g (29.8kg) of carbon dioxide can be removed.

Answer:

The correct answer is 12.58 grams.

Explanation:

Based on the given information, the electrolysis equation will be,

Al³⁺ + 3e⁻ ⇔ Al

1 mol of Al needs 3 moles of electron, and the value for 1 mole of electron is 96485 C.

Thus, 1 mole of Al needs 3 × 96485 C = 289455 C

Now the amount of charge passed is,

T = 2.5 hours

= 2.5 × 3600 s = 9 × 10³ s

Q = Current × Time

= 15A × 9 × 10³ s

= 13.5 × 10⁴ C

The moles of Al plated will be,

= 13.5 × 10⁴ / 289455

= 0.4664 mol

The molecular mass of Al is 26.98 grams per mole

Now the mass of Al will be,

= Number of moles × Molecular mass

= 0.4664 × 26.98

= 12.58 grams

Answer:

(i) The molar mass of sucrose (C12H22O11) can be calculated by adding the molar masses of the individual atoms:

molar mass of C12H22O11 = 12 x 12.01 + 22 x 1.01 + 11 x 16.00 = 342.3 g/mol

To calculate the number of moles of sucrose in the sample, we divide the mass of the sample by the molar mass:

moles of sucrose = mass of sample / molar mass

moles of sucrose = 5.8 / 342.3

moles of sucrose = 0.0169 mol

Therefore, there are 0.0169 moles of sucrose in the sample.

(ii) To calculate the number of moles of carbon in the sample, we need to determine the number of moles of C atoms present in each molecule of sucrose. Sucrose contains 12 carbon atoms per molecule.

moles of carbon = moles of sucrose x number of carbon atoms per molecule

moles of carbon = 0.0169 x 12

moles of carbon = 0.203 mol

Therefore, there are 0.203 moles of carbon in the sample.

(iii) To calculate the total number of carbon atoms in the sample, we multiply the number of moles of carbon by Avogadro's constant:

number of carbon atoms = moles of carbon x Avogadro's constant

number of carbon atoms = 0.203 x 6.02 x 10^23

number of carbon atoms = 1.22 x 10^23

Therefore, there are approximately 1.22 x 10^23 carbon atoms in the sample of sucrose.

Explanation:

The frequency of gamma radiation is calculated to be = 1.11 *10^20 Hz.

A gamma radiation is also known as gamma ray. It is a penetrating form of electromagnetic radiation arising from radioactive decay of atomic nuclei. It consists of shortest wavelength electromagnetic waves, even shorter than X-rays.

Gamma rays can pass through the human body completely and as they pass through, they cause ionizations that damage tissue and DNA.

As we know that E= hf

Hence, f= E/h

Given E=  6.96 x 10-14 J

And, Planck's constant, h = 6.626 *10^-34 m² kg/s

f = 6.96 * 10^-14J  +/6.626 *10^-34

f = 1.11 *10^20 Hz

Hence, frequency of gamma radiation = 1.11 *10^20 Hz.

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Explanation:

well I'm not 100% sure but I studied a little bit with rocks and crystals I've noticed that the hotter the temperature are it does not matter if it is Obsidian the hotter it is the more shinier it will become so the texture of it has to be a right temperature to be able to create a different texture such as a diamond and a diamond has to be compressed so hard that it will turn into diamond this is just an explanation please do not take this as a real answer I hope this help you though

NaCl as a limiting reactant ⇒ true

Given

1.2 g NH₄HCO₃

0.75 g NaCl

63.0075 g NaHCO₃

Required

The limiting reactant

Solution

Reaction

NH₄HCO₃ + NaCl ⇒NH₄Cl + NaHCO₃

mol NH₄HCO₃ :

= 1.2 g : 79,056 g/mol

= 0.015

mol NaCl :

= 0.75 : 58.5

= 0.013

NaCl as a limiting reactant(smaller mol)

Answer:

Which best describes a difference between energy transformations in power plants and dams? Only power plants use fossil fuels to transform energy. Only dams use fission to generate thermal energy. ... Only dams use mechanical energy to produce electricity.

Explanation:

HOPE THIS HELP

PICK ME AS THE BRAINLIEST

Option c is the right response. The correct mathematical operation to convert a sample's atom count to its mole count is atoms/number Avogadro's.

Every atom is made up of a nucleus and maybe one or more electrons. The nucleus is made up of one or more protons and several neutrons. Only the most common type of hydrogen is devoid of neutrons. Hydrogen is a chemical element with atomic number 1 and the letter H. Hydrogen is the lightest atom. Under normal conditions, hydrogen is a gas composed of diatomic molecules, which have the formula H2. It is highly combustible, non-toxic, and devoid of flavour, smell, or colour.

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Answer:

we wear cotton clothes because it helps to cool us down and remove the excess heat that causes us to feel hot.

Answer:

\(\boxed{\mathrm{view \: explanation}}\)

Explanation:

We wear cotton clothes in the summer beacuse cotton absorbs and removes body moisture caused by the sweat and allows better air circulation than fabric clothes.

Answer:

A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).

Explanation:

Answer:

A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous

Answer:

don't understand make it clear

Answer:

(a)

(b)

Refer to the diagram attached for the structures.

Explanation:

Calculate the degree of unsaturation to find the number of rings and multiple bonds (including double bonds) in those isomer molecules. The presence of each ring and each double bond would add one to the degree of unsaturation of that molecule.

Let \(C\), \(N\), \(X\), and \(H\) denote the number of carbon, nitrogen, halogen, and hydrogen atoms in each isomer molecule, respectively.

The degree of unsaturation of one such molecule would be:

\(\displaystyle \frac{2\, C + 2 + N - X - H}{2}\).

For \(\rm C_4 H_8\):

Therefore, the degree of unsaturation of a molecule with the chemical formula \(\rm C_4 H_8\) would be:

\(\begin{aligned}&\text{degree of unsaturation} \\ &= \frac{2\, C + 2 + N - X - H}{2} \\ &= \frac{2\times 4 + 2 + 0 - 8}{2} = 1\end{aligned}\).

In other words, the degree of unsaturation is \(1\) for all isomers with this particular chemical formula. Therefore, each isomer would contain either a ring or a double bond, but not both.

If there is no double bond in one such molecule, there must be exactly one ring per molecule.

The minimum number of carbon atoms in a ring is three. With four carbon atoms in each molecule, there would be either a three-member ring (with one methyl group attached) or a four-member ring.

If there is one double bond in one such isomer molecule, there would not be a ring. Because of the degree of unsaturation, there would be no more than one double bond in each of these molecules.

With four carbon atoms, there are two possible backbones to consider: backbones with three carbon atoms each, and backbones with four carbon atoms each.

The backbone of those molecules might contain three carbon atoms. There would be one double bond in the backbone and one methyl group attached to the carbon atom at the center of the backbone. The corresponding isomer molecule would be 2-methyl-1-propene.

Alternatively, the backbone of those molecules might contain four carbon atoms. There are two possible locations for the double bond:

Notice, that the name 2-Butene refers to two distinct spatial isomers. Unlike carbon-carbon single bonds, groups on the two sides of a carbon-carbon double bond are unable to rotate relative to one another. Therefore, the first and fourth carbon atoms would either be:

Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer:

\(0.01molO_2\)

Explanation:

Hello there!

In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:

\(0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2\)

Best regards!

The reaction that involves the combustion of Magnesium will not start unless some amount of energy is added to it, therefore we need the Bunsen burner flame to be the source of the activation energy for the reaction properly occur, since the reaction would not occur in a spontaneous way. Therefore answer letter B

Answer:

la bombilla de flash contiene 0,00550 gramos de O2

Explanation:

Answer:

a different number of neutrons in their nuclei.

Explanation:

Mass of the steel is \(1004.4 g\)

We can express this mathematically as ;

Given :

Density of this steel= 8.1g/cm3

\(Mass= 124 cm^{3}\)

If we make Mass subject of formula,

\(Mass= ( density *volume)\)

Then let us substitute the values into the expression

\(Mass= (124*8.1)\)

\(= 1004.4 g\)

Therefore, mass of the steel is \(1004.4 g\)

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Answer:

According to conservation of matter, there should be equal amounts of all elements on both the reactant and product side.

Reactant:

1 Ca

1 C

1 O

Product:

1 Ca

1 C

3 O

Therefore, your friend is right because the law of conservation of matter is not followed in this chemical equation.

Explanation: