2. Why would a calcium (Ca) atom be larger than a bromine (Br) atom even
though they both have 4 energy levels? *

The action can speed up the rate of a chemical reaction is breaking a reactant into smaller pieces.

Rate of a chemical reaction tells about the duration of time at which reaction complete.

Rate of reaction is also define as the rate of change of concentration of reactant with respect to the time. So, concentration of reactant is directly proportional to the rate of a reaction and wherever we increases the surface area of reactant rate increases as reactant will participate through large possible side. Catalyst also speeds up the reaction without being involved in it and high temperature also increases the kinetic energy of the reactant to do effective collision.

Hence, option (d) is correct i.e. breaking a reactant into smaller pieces increases the rate.

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Answer:

The answer is C) It is given off as heat

Explanation:

        Definition of unavailable energy : energy that cannot perform work while under the current conditions; see also available energy, energy deterioration, and entropy.

       Energy can transform from more useful forms into less useful forms, but it cannot be created or destroyed. It turns out that some energy gets transformed into an useless form in every real-world energy transfer or transformation.

    Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or unpredictability since work is produced by organized molecular motion.

   What is Mcq for McVisible Energy? Available energy is the largest portion of low-grade energy (heat) that is available for conversion. The smallest amount of heat that needs to be rejected is referred to as unavailable energy.

     For the system with two heat reservoirs undergoing this irreversible heat transfer, entropy increases. We'll see that this implies that the ability to use the transferred energy for work has been lost. Energy is no longer available to perform work due to the increase in entropy.

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Adding sulfuric acid to water will decrease the pH dramatically.option 4.

Sulfuric acid is a strong acid and is a type of acid rain. When five drops of sulfuric acid are added to a sample of water, the pH of water will decrease dramatically. This is because sulfuric acid is a strong acid that is capable of dissociating completely in water, producing a high concentration of hydrogen ions (H+) and sulfate ions (SO4²-). This increase in hydrogen ion concentration lowers the pH of water and makes it more acidic.Acid rain is a type of rain that has a pH lower than 5.6, which is the normal pH of rainwater. The acidity of acid rain is caused by the presence of strong acids like sulfuric acid and nitric acid. These acids are produced when sulfur dioxide (SO2) and nitrogen oxides (NOx) are emitted into the atmosphere by human activities like burning fossil fuels and industrial processes.When these gases react with water, they form sulfuric acid and nitric acid, respectively, which then fall to the ground as acid rain.

Acid rain can have harmful effects on the environment, including the acidification of lakes and rivers, the degradation of forests and soils, and the corrosion of buildings and monuments.To conclude, when five drops of sulfuric acid are added to a sample of water, the pH of water will decrease dramatically.option 4.

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Answer: Temperature measures thermal energy, and heat is the flow of thermal energy

Explanation:

Heat describes the transfer of thermal energy between molecules within a system. Heat measures how energy moves or flows. It is measured in Joules.

Temperature measures the hotmess or coldness of a body or how much thermal energy it contains . Temperature describes the average kinetic energy of molecules within a material or system. It is measured in Celsius (°C), Kelvin(K), or Fahrenheit (°F).

Thus the correct option is Temperature measures thermal energy, and heat is the flow of thermal energy

Answer:

its c

Explanation:

edg 2021

Answer:

trees

Explanation:

we plant trees hindi sure kung tama to hihi

Answer:

Calculate the mass in grams.

Answer: Calculate the mass in grams of calcium bromide the chemist has added to the flask. Round your answer to 3 significant digits.

Explanation:

The metal X has an approximate molar mass of 42.36 g/mol and the metal is most likely calcium.

The molar mass of the metal carbonate XCO₃ and identify the metal X, we need to calculate the number of moles of XCO₃ and CO₂ using the given masses and molar masses.

The molar mass of CO₂ (carbon dioxide) is 12.011 g/mol (for carbon) + 2 * 15.999 g/mol (for oxygen) = 44.01 g/mol.

The number of moles of CO₂ can be calculated using the formula:

moles of CO₂ = mass of CO₂ / molar mass of CO₂

moles of CO₂ = 0.855 g / 44.01 g/mol

moles of CO₂ ≈ 0.01944 mol

Since the reaction stoichiometry is 1:1 between XCO₃ and CO₂, the number of moles of XCO₃ is also approximately 0.01944 mol.

molar mass of XCO₃ = mass of XCO₃ / moles of XCO₃

molar mass of XCO₃ = 2.012 g / 0.01944 mol

molar mass of XCO₃ ≈ 103.38 g/mol

The molar mass of XCO₃ is approximately 103.38 g/mol.

To determine the metal X:

molar mass of X = molar mass of XCO3 - molar mass of CO3

molar mass of X = 103.38 g/mol - (12.011 g/mol + 3 * 15.999 g/mol)

molar mass of X ≈ 42.36 g/mol

Metal X is most likely Calcium that has a molar mass of 40 g/mol

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The thermodynamics of leaching of ilmenite in hydrochloric acid for titania pigment production is an industrial production of nano-sized titanium dioxide (TiO2).

Thermodynamics is defined as the change in the energy of system that brings about work in that system.

The leaching of ilmenite which is a titanium-iron oxide mineral with HCl can lead to the production of titanium dioxide (TiO2).

The use of thermodynamics in this process controls the heat and energy of the leaching system leading to a better yield of final products.

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Answer:

The answer is 16

Explanation:

It needs to be hald of the medium so devide the 2 numbers

Chlorofluorocarbons (CFCs) are man-made chemicals containing chlorine and fluorine that cause ozone molecules to break down. Thus, option B is the answer.

Chlorofluorocarbons are non-toxic, synthetic compounds that contain atoms of Chlorine, Fluorine and Carbon. They are commonly used in the manufacture of aerosol sprays and are also used as solvents and refrigerants. CFCs were first introduced in 1928 by General Motors Company for its refrigerators.

While CFCs are very safe to use in most applications and are stable in the lower atmosphere, these chemicals when released to the upper atmosphere can cause significant reactions. CFCs when released into the upper atmosphere can lead to the destruction of the ozone molecules followed by the release of the UV radiation into the atmosphere.

Thus, CFCs are man-made chemicals which cause ozone molecules to break down.

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Answer:

Pain

Explanation:

the pain depends on u banging your head

Answer:

The median would be 6700

Explanation:

Arrange data values from lowest to highest value

The median is the data value in the middle of the set

.

Ordering a data set x1 ≤ x2 ≤ x3 ≤ ... ≤ xn from lowest to highest value, the median x˜ is the data point separating the upper half of the data values from the lower half.

If the size of the data set n is odd the median is the value at position p where

Formula for the median

p=n+12

x˜=xp

If n is even the median is the average of the values at positions p and p + 1 where

p=n2

x˜=xp+xp+12

If there are 2 data values in the middle the median is the mean of those 2 values.

Answer:

yes

Explanation:

its not that hard to get

To find moles when given the molar mass, you can use the concept of molar mass as a conversion factor.Molar mass represents the mass of one mole of a substance, expressed in grams per mole (g/mol).

To calculate moles, divide the given mass of the substance by its molar mass. The equation is:

moles = mass / molar mass

For example, if you have 56 grams of carbon dioxide (CO2) and want to find the number of moles, you need to know the molar mass of CO2, which is approximately 44 g/mol. Using the equation above:

moles = 56 g / 44 g/mol

moles ≈ 1.27 mol

Therefore, there are approximately 1.27 moles of carbon dioxide in 56 grams.

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Answer:

\(CaS\)

Explanation:

Hello!

In this case, since calcium's oxidation state when forming ionic bonds is +2 and sulfur's oxidation state when bonding those bonds is -2, for the required formula we write:

\(Ca^{2+}S^{2-}\)

Now, since they have the same charge number, we infer the ionic compound formed when they bond is calcium sulfide:

\(CaS\)

Best regards!

Explanation:

To form bonds with noble gases, a lot of energy is required to form those bonds. Halogens, on the other hand, are extremely reactive. ... The halogens tend to be very reactive, while the noble gases are in no way reactive and don't bond easily, if at all.

Hope it helps you ... ...

Answer:

Ununoctium

Explanation:

It's at the very end of the periodic table

Answer:

Ununoctium

Explanation:

Ununoctium is the last chemical element int the periodic table.

Answer:

the  new pressure of Oz is 0.5 atm

Explanation:

The computation of the new pressure of Oz is shown below:

Given that

Original pressure of O2 (P1) = 1 atm

And, the Original volume of oxygen O2 (V1) = 75L

Now

New pressure of O2 (P2) = ?

And, the New volume of O2 (V2) = 2V1  i.e

= (2 × 75L)

= 150L

Here we applied the Boyle's law formula  

P1V1 = P2V2

1 atm × 75L = P2 × 150L

75 atm × L = 150L ×P2

Now Divide both sides by 150L to get P2

75 atm × L ÷ 150L = 150L × P2 ÷ 150L

0.5 atm = P2

Hence, the  new pressure of Oz is 0.5 atm

The mass(in grams) of iron, Fe produced from the 92.5g of iron (ii) oxide, FeO is 71.9 grams

The mass of Fe produced from the 92.5g of iron (ii) oxide, FeO can be obtained as follow:

2FeO → 2Fe + O₂

From the balanced equation above,

143.7 g of FeO reacted to produce 111.7 g of Fe

Therefore,

92.5 g of Fe will react to produce = (92.5 × 111.7) / 143.7 = 71.9 g of Fe

Thus, the mass of Fe produced from the reaction is 71.9 grams

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Complete question:

How many grams of Fe are produced from 92.5 g of FeO given the following reaction 2FeO → 2Fe + O₂

Answer: It is either C. or D.

Explanation: I did some reading about it and it talks about fuel but I know that it didn’t say all of them are used as fuels.  maybe I’m wrong

Petroleum is composed of hydrocarbons of various chain length. Different products can be extracted from petroleum but all products cannot be used as fuel.

Hydrocarbons in diesel have higher boiling point than that of gasoline.

Petroleum is a naturally occurring crude liquid mixture of hydrocarbons. Petroleum can be fractionated to different components such as gasoline, kerosene, diesel etc.

Each fraction vary in the number of carbons and hydrogens in it or called the difference in chain length. Kerosene contains 8-16 carbons where as gasoline and diesel have more carbons.

Not all products of petroleum fractionation can be used as fuel. Some of them with effective quality is taken as fuels.

The boiling point of hydrocarbons in diesel is greater (about 130-380 degree Celsius) than the hydrocarbons in gasoline which is having boiling point in he range 30-225 degree Celsius.

Therefore, the statement C is correct.

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475 g is the correct response to the query. This is true because the combined mass of two solutions with masses of 450 g and 350 g equals 800 g. 125 g of solid crystals are created and fall to the bottom of the container as a result of a chemical reaction.

As a result, the mass of the residual solution is equal to 475 g, or 800 g less 125 g. It is significant to observe that the masses of the two solutions that were combined originally do not equal those of the solid crystals or the leftover solution.

This is because the two solutions' chemical reaction when combined results in a transition of the matter that is resulting in the production of a new substance.

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The statements that accurately describe the rock cycle are:

Rocks change from one type to another in a definite order.

Rocks change slowly over time.

What is Rock Cycle?

It illustrates how the three major types of rocks—igneous, sedimentary, and metamorphic—can be transformed from one type to another over time through various geological processes such as weathering, erosion, sedimentation, and metamorphism. The rock cycle is driven by the continuous movement of the Earth's crust and the interactions between the different components of the Earth system, such as the atmosphere, hydrosphere, and biosphere.

The rock cycle is a natural process that describes how rocks transform from one type to another over time through a series of geological processes. It is a continuous process and there is no set starting or ending point. The rock cycle is driven by various factors including heat, pressure, weathering, erosion, and geological activity.

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Answer:

A C D

Explanation:

The result of the computation when you follow the steps is 1.699.

A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"

What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.

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The ranking of boiling point is based on the molecular weight and intermolecular forces between molecules.

2 central carbons, each with CH3 bonded to them. A central C has H bonded left, above, behind to the right, and in front to the right. A carbon chain with 5 central carbons, with CH3 bonded to the first, second, and last carbons in the chain. 2 central carbons with CH3 bonded to the outside, and CH3 bonded to the leftmost inside carbon.

In this case, all compounds are hydrocarbons, meaning they are non-polar molecules and exhibit van der Waals forces. However, the length of the carbon chain and the arrangement of atoms in the molecule affect the magnitude of these forces.

The first compound has only two carbons and exhibits weak intermolecular forces, so it has the lowest boiling point. The second compound has three carbons and a more complex arrangement of atoms, resulting in slightly stronger van der Waals forces and a higher boiling point.

The third compound has a longer carbon chain, which increases the molecular weight and results in stronger intermolecular forces, giving it a higher boiling point than the previous two. The fourth compound has the longest carbon chain and has multiple branches, which increases the surface area of the molecule and the strength of the intermolecular forces, giving it the highest boiling point.

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Answer:

The answers are 4, 2, 3, 1

Explanation:

Answer:

24.31 g/mol.

Explanation:

moles =mass/molar mass

n=w/m

We can see that an atom with 14 protons, 14 neutrons, and 16 electrons is unstable, and has a -2 charge.

So the correct option is the third one.

An atom with 14 protons, 14 neutrons, and 16 electrons is not stable. The number of protons in an atom, also known as its atomic number, determines its element and its chemical properties. In this case, the atom has 14 protons, which corresponds to the element silicon (Si) on the periodic table.

For an atom to be stable, it should have a balanced number of protons and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or electron shells. The number of electrons in a stable atom should be equal to the number of protons, resulting in a neutral charge overall.

In this case, the atom has 14 protons and 16 electrons, which means it has two more electrons than protons, resulting in a net charge of -2. This is an example of an ion.

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The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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Answer:

its d

. . . . . . . .. . . . . . . . .. .