Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of marble chips.
Describe experiments to investigate what effect using smaller marble chips has on the rate of this reaction.

Answer:

The time you will get to Atlantic City is 3 pm

Explanation:

Given;

speed limit, v = 50 km/h

distance to be traveled, d = 150km

The time of the motion is given as;

time = distance / speed

t = (150 km) / (50 km/h)

t = 3 hours

Thus, if you leave your home at noon, the time you will get to Atlantic City is given as;

time to get home = 12 pm + 3hours = 3 pm

Therefore, the time you will get to Atlantic City is 3 pm

Concern of the survey method of research is : 3.)the researcher is dependent on the person answering the survey to be honest.

One concern of the survey method of research is that the researcher is dependent on the person answering the survey to be honest. There is a risk that participants may provide inaccurate or incomplete responses due to range of factors such as social desirability bias, memory recall issues, or misunderstanding of questions.

Therefore, option 3)the researcher is dependent on the person answering the survey to be honest is the most accurate answer.

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Answer:

A: three

Explanation:

Answer: 63.6166 amu (atomic mass units)

Explanation: When an element X is written in the form of X-N, N will the atomic mass of that element. So we have copper with a mass of 63 and 65. We are given percentages of each one. 69.17/100 of the copper atoms will be of weight 63 while 30.83/100 will be of weight 65. Keep in mind that amu does not actually mean weight but I'm just using it as a tool to help explain the general concept. Assume you have 100 copper atoms, and you need to find the average atomic mass for them, if you do this you will solve the problem. Due to the fractions, 69.17 of them will be 63 amu and the rest will be 65. So do 69.17*63+65*30.83 and divide by one hundred. By doing this you will get 63.6166. If my answer doesn't make sense, search up how to calculate weighted averages

Hope this helps

In the Lewis structure of methanol (CH3OH), the OH group is placed on the outside because it is an important functional group that influences the chemical properties and reactivity of the molecule.

The Lewis structure is a representation of a molecule that shows the arrangement of atoms and valence electrons. In methanol, carbon (C) is the central atom bonded to three hydrogen (H) atoms and one oxygen (O) atom. The oxygen atom forms a single bond with carbon and also has two lone pairs of electrons.

The placement of the OH group (hydroxyl group) on the outside of the Lewis structure is significant because it determines the chemical behavior of methanol. The OH group consists of an oxygen atom bonded to a hydrogen atom and represents the presence of an alcohol functional group.

In organic chemistry, functional groups are specific arrangements of atoms within a molecule that give rise to characteristic chemical reactions and properties. The presence and position of functional groups can greatly influence the behavior and reactivity of a compound. In the case of methanol, the hydroxyl group provides the molecule with its characteristic properties.

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The properties of the dyes you can make from different flowers are:

Flower dyes have unique colors to offer a range of options for marketing. Rose petals yield pink and red shades. They are Natural and safe. Eco-conscious consumers prefer synthetic-free products, making your dyes attractive.

In terms of Aromatic Qualities: Lavender and jasmine smell nice. Using these flowers in dyes adds subtle scents for a sensory experience. Lightfastness and durability are crucial for creating dyes that resist fading when in the sunlight.

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The decay of radium-226 into radon-222 plus an alpha particle releases approximately 4.9 MeV of energy.

Radium-226 undergoes alpha decay, in which it emits an alpha particle (a helium nucleus) and transforms into radon-222. During this process, a certain amount of energy is released in the form of gamma rays, which are high-energy photons. The energy released in this decay can be calculated using Einstein's famous equation E=mc², where E is the energy released, m is the mass difference between the initial and final states, and c is the speed of light.

The mass difference between radium-226 and the resulting radon-222 plus alpha particle is approximately 0.008931 atomic mass units (amu), which when converted to energy using Einstein's equation, yields a value of approximately 4.9 MeV (million electron volts). This energy is released in the form of gamma rays, which can be measured using various types of detectors.

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The addition of metal alloy to glass ionomers produces a product that can be used for core buildups and the repair of fractured cusps and amalgam fillings as well as abutments for overdentures.

Alloy is generally a metallic substance which is made of two or more elements. e.g., bronze.

The constituent of alloys may be metals or non-metals.

The formation of alloy produces wide variety of application.

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Answer:

mining of clay limestone and then heated to a certain temperature of 1450⁰ in a cement kiln

To find the molar mass of the gaseous compound, we need to use the ideal gas law equation:
PV = nRT
where P is the pressure (1.62 atm), V is the volume (1 L, since the density is given in g/L), n is the number of moles, R is the gas constant (0.0821 L atm/mol K), and T is the temperature in Kelvin (296.65 K, since 23.5°C = 296.65 K).

First, we need to find the number of moles of the gas:

n = PV/RT
n = (1.62 atm)(1 L)/(0.0821 L atm/mol K)(296.65 K)
n = 0.0653 mol

Next, we can use the definition of molar mass (mass per mole) to find the molar mass of the gas:

Molar mass = mass/number of moles

Since we know the density of the gas (1.64 g/L), we can use it to find the mass of 1 mole of the gas:

mass = density x volume = 1.64 g/L x 1 L = 1.64 g

Therefore, the molar mass of the gas is:

Molar mass = mass/number of moles = 1.64 g/0.0653 mol = 25.1 g/mol

So the molar mass of the gaseous compound is approximately 25.1 g/mol.

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To find the molar mass of the gaseous compound, we need to use the ideal gas law equation:
PV = nRT
where P is the pressure (1.62 atm), V is the volume (1 L, since the density is given in g/L), n is the number of moles, R is the gas constant (0.0821 L atm/mol K), and T is the temperature in Kelvin (296.65 K, since 23.5°C = 296.65 K).

First, we need to find the number of moles of the gas:

n = PV/RT
n = (1.62 atm)(1 L)/(0.0821 L atm/mol K)(296.65 K)
n = 0.0653 mol

Next, we can use the definition of molar mass (mass per mole) to find the molar mass of the gas:

Molar mass = mass/number of moles

Since we know the density of the gas (1.64 g/L), we can use it to find the mass of 1 mole of the gas:

mass = density x volume = 1.64 g/L x 1 L = 1.64 g

Therefore, the molar mass of the gas is:

Molar mass = mass/number of moles = 1.64 g/0.0653 mol = 25.1 g/mol

So the molar mass of the gaseous compound is approximately 25.1 g/mol.

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Answer:

this means that the movement of the galaxies in the universe are stretching and are getting bigger and the frequency of the light waves are decreasing because the wider something gets like galaxies and stuff like that that gives off light are stretching so it will become dimer because it is trying to stretch to wider surroundings and that means the light has to stretch to so the light has to cover bigger surfaces and the light can not get brighter so it has to stretch and dim its light.

Explanation:

Answer:

mass in a given volume

Explanation:

Density is the mass in a given volume or mass per unit volume of a substance.

Mass is defined by the amount of matter present in a substance.

Volume is the space occupied by a body.

Mathematically;

                      Density  = \(\frac{mass}{volume}\)  

The millionth position. -0.104°C is the freezing point. A solution of aqueous sodium chloride has a freezing point of 0°C.

Aqueous solutions are made up of water and one or even more mixed materials. Solids, gasses, or even other liquids can all dissolve in an aqueous solution. A mix must be stable in required to be deemed a genuine solution.

Cola, saltwater, rain, acid, base, & salt solutions are just a few instances of aqueous solutions. Any liquid which lacks moisture is an instance of a solution that isn't an aqueous solution.

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Answer:

-1.934

Explanation:

0 - {(0.520) x (1.86) x (2)}

Answer:

that the water is blue because of the way water absorbs light, the way particles in the water scatter light, and also because some of the blue light from the sky is reflected

Answer:

c I am pretty sure it's c because I learned this today in science and I think that what it is but if it's not see then it's I don't know

Explanation:

In general, catalytic action is a chemical reaction between the catalyst and a reactant, forming chemical intermediates that are able to react more readily with each other or with another reactant, to form the desired end product.

I hope it's helpful!!

El valor positivo de \(m\) para que la ecuación \(x\cdot (x+2) = 4\cdot m \cdot x - 8\) tenga una raíz que sea el doble de la otra es 2.

De acuerdo con el enunciado de esta pregunta, debemos encontrar un valor de \(m\) a partir del siguiente sistema de ecuaciones:

\(r\cdot (r+2) = 4\cdot m \cdot r -8\) (1)

\(2\cdot r \cdot (2\cdot r + 2) = 4\cdot m \cdot (2\cdot r) - 8\) (2)

Ahora simplificamos el sistema de ecuaciones:

\(r^{2}+2\cdot r = 4\cdot m\cdot r - 8\) (1b)

\(4\cdot r^{2}+4\cdot r =8\cdot m\cdot r - 8\) (2b)

Despejamos \(m\) en cada expresión, lo eliminamos y resolvemos el polinomio resultante:

\(\frac{r^{2}+2\cdot r + 8}{4\cdot r} = \frac{4\cdot r^{2}+4\cdot r +8}{8\cdot r}\)

\(r^{2}+2\cdot r + 8 = 2\cdot r^{2}+2\cdot r +4\)

\(r^{2}-4 = 0\)

\(r^{2} = 4\)

\(r = \pm 2\)

Finalmente, determinamos el valor de \(m\), que al ser positivo, debemos utilizar \(r = 2\):

\(m = \frac{2^{2}+2\cdot 2 + 8}{4\cdot 2}\)

\(m = 2\)

El valor positivo de \(m\) para que la ecuación \(x\cdot (x+2) = 4\cdot m \cdot x - 8\) tenga una raíz que sea el doble de la otra es 2.

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Answer:

The correct option is;

b.Chemical bond

Explanation:

Chemical bonds are the attractive forces holding the atoms within a compound together. The concept of chemical bonding is fundamental to the explanation of chemical phenomena including reaction mechanism and molecular behavior

There are different chemical bonds such as ionic bonds formed by the attraction of oppositely charged ions, covalent bonds, formed by the sharing of electrons and polar covalent bonds.

Gases near together and vibrate in position however, don't circulate beyond each other. In a liquid, the particles are interested in every different but now not as a great deal as they may be in a strong.

The particles of a liquid are near together, constantly transferring, and may slide beyond one another. The Kinetic-molecular concept attempts to explain the behavior of fuel molecules based totally on the nature of gasoline. The principle is grounded on  simple assumptions

In gases the debris passes swiftly in all directions, regularly colliding with every different facet of the box. With a boom in temperature, the debris gains kinetic strength and passes more quickly. Gasoline is a state of matter that has no constant form and no fixed extent. Gases have a decreased density than other states of the count, together with solids and liquids. there may be a high-quality deal of empty area between debris, that have loads of kinetic energy and aren't especially drawn to one another.

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In a sunny day, the plant makes use of water through photosynthesis and transpiration.

Photosynthesis is defined as the process by which green plants, which has chlorophyll, makes use of water and carbondioxide in the presence of sunlight as energy to form oxygen and glucose.

Transpiration is the movement is of water out of the plant through its pores located on the leaves, roots and stem. This process is increased in sunny seasons.

Therefore, In a sunny day, the plant makes use of water through photosynthesis and transpiration.

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Answer:

in transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.

Explanation:

The mass of Al that will be deposited at the cathode is 0.651 g.

To determine the mass of Al deposited at the cathode, we need to consider the current (25 A), the time (1.0 hour), Faraday's constant (96,485 C/mol), and the molar mass of Al (26.98 g/mol).

First, convert the time to seconds: 1.0 hour * 3600 seconds/hour = 3600 seconds.

Next, calculate the total charge (Q) passed through AlCl3: Q = current × time = 25 A × 3600 s = 90,000 C.

Now, determine the moles of electrons (n) involved: n = Q / Faraday's constant = 90,000 C / 96,485 C/mol ≈ 0.933 moles of electrons.

Since the reaction is Al3+ + 3e- → Al, 1 mole of Al requires 3 moles of electrons. So, calculate the moles of Al formed: moles of Al = 0.933 moles of electrons / 3 ≈ 0.311 moles of Al.

Finally, calculate the mass of Al deposited: mass of Al = moles of Al × molar mass of Al = 0.311 moles × 26.98 g/mol ≈ 8.40 g.

Thus, 8.40 g of Al will be deposited at the cathode.

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Answer:

The mass of Al deposited at the cathode will be approximately 26.44 g after 1.0 hour of electrolysis at a current of 25 A.

Explanation:

The amount of metal deposited at the cathode during electrolysis is related to the charge passed through the cell by Faraday's law of electrolysis:

moles of metal deposited = charge / (Faraday's constant × number of electrons transferred)

The Faraday's constant (F) is the amount of electric charge carried by one mole of electrons and its value is 96485 C/mol.

For aluminum (Al), the number of electrons transferred during reduction is three, and the molar mass of Al is 26.98 g/mol.

Therefore, the mass of Al deposited can be calculated as follows:

1. Calculate the total charge passed through the cell:

  charge = current × time

  charge = 25 A × 3600 s = 90000 C

2. Calculate the moles of Al deposited using Faraday's law:

  moles of Al = charge / (F × number of electrons transferred)

  moles of Al = 90000 C / (96485 C/mol × 3) = 0.98 mol

3. Calculate the mass of Al deposited using the molar mass of Al:

  mass of Al = moles of Al × molar mass of Al

  mass of Al = 0.98 mol × 26.98 g/mol = 26.44 g

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In Cell A, there would be 8 chromosomes present at the end of the meiosis process.

Meiosis is a type of cell division that produces four daughter cells from one parent cell. It is a type of nuclear division that occurs in eukaryotic cells and is the process by which gametes (sex cells) are formed. The process of meiosis is composed of two separate divisions called meiosis I and meiosis II. During meiosis I, homologous chromosomes (which contain two copies of each gene) pair up, exchange genetic material, and then separate. This process is called crossing over and it creates genetic diversity. During meiosis II, the sister chromatids (copies of each chromosome) separate and move to opposite ends of the cell.

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These next statements are true because of the Bohr model of the hydrogen atom:

These statements are true because of the Bohr model of the hydrogen atom. The Bohr model describes the way the electrons move in a hydrogen atom. This model shows that electrons are arranged in shells around the nucleus. Each shell corresponds to a specific energy level, and each energy level has a fixed circular orbit of the electron around the nucleus. When the electron is in the orbit closest to the nucleus, it has its lowest energy state.

When the electron absorbs a photon with energy equal to the new energy state, it moves to a higher energy state. Only certain energy levels are allowed within the hydrogen atom because electrons can only exist in specific energy levels.

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Combining sodium hydroxide and hydrochloric acid will produce water and: a. sodium chloride.

A neutralisation reaction occurs when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed. Water ( H₂O ) and sodium chloride (NaCl) are created when sodium hydroxide, a base, interacts with hydrochloric acid, an acid. The following equation can be used to model this reaction:

NaOH + HCl → H₂O + NaCl

Water and sodium chloride are the end products of the reaction between sodium hydroxide and hydrochloric acid.

Therefore the correct option is A.

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Answer:

(1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go. (2) Filters out waste from food and pushes it through intestines and out the body (and you know how and where it gets out).