For a fixed amount of gas at a fixed temperature, what will happen if the volume is doubled? Will the pressure be doubled, remain unchanged, quadruple, or be halve?

Answer:

Visible light spectrum is a part of electromagnetic waves.  The colors of the visible light spectrum are organised on the basis of their wavelength and frequency.

As the light or color having high frequency will have the shorter wavelength and vice versa, so  colors in visible light spectrum arranged from highest frequency to lowest frequency or from shortest wavelength to highest wavelength. For example: The highest frequency color is violet and lowest frequency of visible light is red.

The explanation regarding the colors of the visible light spectrum is to be explained below:

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Answer:

try 76.35 or d didi in the back of the STREETS of the city girls are the same time as hell

Answer: A. plankton

Explanation: The bottom level of the ocean's food chain is made up of one-celled organisms called phytoplankton. These tiny organisms are microscopic.

i think it would be A. Plankton.

The average atomic mass of your cadmium element is the mass and random errors in the measurement of mass and differences that arise from the nature of samples used for the experiment

The average atomic mass is the mass of the element that is obtained when you  consider the masses of all the isotopes that are found in the element as well as the percentage abundance of each of the isotopes and the isotope percentages in each of the samples would not be the same and this means that the results that each group would obtain would slightly differ from each other

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Answer:

We can solve this by the method of which i solved your one question earlier

so again here molar mass of C12H25NaSO4 is 288.372 and number of moles for 11900 gm of C12H25NaSO4 will be = 11900/288.372

which is almost = 41.26 moles

so to get one mole of C12H25NaSO4 we need one mole of C12H26O

so for 41.26 moles of C12H25NaSO4 it will require 41 26 moles of C12H26O

so the mass of C12H26O = 41.26× its molar mass

C12H26O = 41.26×186.34

= 7688.38 gm!!

so the conclusion is If you need 11900 g of C12H25NaSO4 (Sodium Lauryl Sulfate) you need C12H26O 7688.38 gm !!

Again i d k wether it's right or wrong but i tried my best hope it helped you!!

Helium could only persist until the temperature dropped too low for heavier elements to develop.

Due to a bottleneck caused by the lack of a stable nucleus with 8 or 5 nucleons, Big Bang nucleosynthesis created extremely few nuclei of elements heavier than lithium. Additionally, the amount of lithium-7 created during BBN was constrained by this deficiency of bigger atoms.

Before few minutes into the expansion, the early cosmos was too hot for atoms to form. There were only a few minutes left before it was too cold to continue nucleosynthesis and no more elements could start to form.

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Statement A "Fertilizers have both positive and negative effects" is the one that best summarizes the information in the paragraph. Option A

This is because fertilizers have the potential to be a beneficial addition to agriculture, improving crop yields and leading to more efficient food production while also causing environmental damage.To minimize the environmental impact of agricultural chemicals, farmers should apply the chemicals as directed by the manufacturers, using appropriate dosages.

It is important to maintain a balance between the need to produce more food to feed a growing population and the negative effects of agricultural chemicals on the environment.The Environmental Protection Agency (EPA) is one of the agencies working to prevent environmental contamination caused by fertilizers.

Through their efforts, the EPA is working to prevent contamination of groundwater and other sources of water by agricultural chemicals such as fertilizers.

In summary, fertilizers are essential agricultural chemicals that have both positive and negative effects on society, depending on how they are used. Proper application and management are necessary to minimize the negative effects of fertilizers on society. Option A

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Answer:

C. 14

Explanation:

The mass number is the number of protons + neutrons and the atomic number is the number of protons.

If the mass number is 27, you subtract the atomic number, 13.

27 - 13 = 14 neutrons

The empirical formula of Lorelai's compound is C₄H₁₀O

Divide by their molar mass

C = 64.8 / 12 = 5.4

H = 13.62 / 1 = 13.62

O = 21.58 / 16 = 1.35

Divide by the smallest

C = 5.4 / 1.35 = 4

H = 13.62 / 1.35 = 10

O = 1.35 / 1.35 = 1

Thus, the empirical formula of the compound is C₄H₁₀O

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The chemical equation for the reaction, the enthalpy change of which is equal to the standard enthalpy of sucrose formation, C12H22O11;  C6H12O6 (s) + 6 O2 (g) + 11 H2O (l) Δ H is equal to -2,837 kJ/mol.

What is Chemical equation?

A chemical equation is a graphical representation of a chemical reaction, with the reactants (the starting materials) on the left and the products (the end materials) on the right. It uses chemical formulas to identify the reactants, products, and direction of the reaction.

As an example: 2H2 + O2 → 2H2O

In this equation, two molecules of hydrogen (2H2) react with one molecule of oxygen (O2) to form two molecules of water (2H2O).

What does Molecules mean?

Molecules are the tiniest particles of a substance that can still be identified as such. They are composed of atoms held together by chemical bonds. Molecules are the fundamental building blocks of matter and are required for life on Earth. Molecules are important for a variety of reasons. They play a role in how substances interact with one another and react to form new substances. They are also important in energy transfer and signal transmission within the body.

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Answer:

I could not see the photo please resend the photo

Salt suitable for sprinkling on food at meals.

Answer:

1 is balenced

2 is unbalenced

3 is unbalenced

4 is balanced

Explanation:

The temperature at which  75 grams ammonium bromide dissolve in 100g of water is 20 degree Celsius.

Solubility can be defined as the maximum amount of solute that can be dissolved in a solution at a given temperature.

It is asked that

temperature at which 75 grams ammonium bromide dissolve in 100 g of water.

From the Solubility graph of Ammonium Bromide it can be seen that

at 20 degree Celsius , 75.5 g of Ammonium Bromide will get dissolved.

The temperature at which  75 grams ammonium bromide dissolve in 100g of water is 20 degree Celsius.

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The correct answer is c. CO2, as carbon dioxide is the gas released during the reaction between hydrochloric acid and limestone. Option C

In the chemical reaction between hydrochloric acid (HCl) and limestone (CaCO3), the balanced equation is:

CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

From the equation, we can see that one of the products is CO2 (carbon dioxide) gas. Therefore, the identity of the gas released when hydrochloric acid is poured on limestone is carbon dioxide (CO2).

Carbon dioxide is a colorless and odorless gas that is commonly produced in various chemical reactions and natural processes. In this reaction, when hydrochloric acid reacts with the calcium carbonate present in limestone, it forms calcium chloride (CaCl2), water (H2O), and carbon dioxide (CO2). The effervescence or fizzing observed is due to the release of carbon dioxide gas.

The calcium chloride and water formed in the reaction remain in the aqueous (liquid) state. However, the carbon dioxide gas is released as a product and can be observed as bubbles or a gas escaping from the reaction mixture.

Therefore, the correct answer is c. CO2, as carbon dioxide is the gas released during the reaction between hydrochloric acid and limestone. Option C

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From the Rutherford results of the atom, we can say that it would fit a planetary model of the atom.

We know that that atom is the smallest particle of a substance that can take part in a chemical reaction. There were various models of the atom that could be explained based on the empirical results that were obtained by the experiments of a lot of scientists.

In the case of the Rutherford model of the atom, we know that experiment had to do with the bombardment of the thin gold foil with alpha particles and some of the alpha particles were scattered at large distances.

A zinc sulfide screen was used to identify the positions of the alpha particles that were scatted in the course of the experiment as shown.

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Answer:

there is about 6 zeros in 1,000,000

Answer:

6   0's

Explanation:

happy bday #LibraGurl

The electron configuration is 1s², 2s², 2p⁶, 3s²,3p⁶, 4s², 3d¹⁰, 4p⁵ i.e. 35 that is bromine.

Electronic configuration is defined as the arrangement of electrons around the nucleus of a particular atom or molecule.

An atom is made up of particles like protons, neutrons and electrons.

A neutral atom are the atoms with same number of protons and electrons.

Electronic configuration of an atom is defined as distribution of electrons in atoms shells and sub shells.

Bromine is element with symbol Br and atomic number 35. It is a oily liquid with a sharp smell, it is toxic in nature.

The neutral atom of bromine has 35 electrons as the neutral atom has same number of electrons and protons.

Thus, the electron configuration is1s², 2s², 2p⁶, 3s²,3p⁶, 4s², 3d¹⁰, 4p⁵, i.e. 35 that is bromine.

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In this lab, a hydrometer is used to measure the density of sugar solutions. If the same hydrometer was used to measure the density of alcohol solutions, you would likely observe different readings due to the differences in density between sugar and alcohol solutions.

Here's a step-by-step explanation:

1. A hydrometer works by floating in a liquid and measuring the liquid's density based on the level at which it floats. The higher it floats, the lower the liquid's density, and vice versa.
2. Sugar solutions generally have a higher density than water because sugar molecules are dissolved in the water, increasing the overall mass per unit volume.
3. Alcohol solutions, on the other hand, usually have a lower density than water. This is because alcohol molecules are less dense than water molecules, resulting in a lower overall mass per unit volume when mixed with water.
4. When using the same hydrometer to measure the density of alcohol solutions, it would likely float higher in the alcohol solution compared to the sugar solution, indicating the lower density of the alcohol solution.

In summary, if the same hydrometer was used to measure the density of alcohol solutions, it would provide different readings compared to measuring sugar solutions, reflecting the differences in density between the two types of solutions.

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The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

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Answer:

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.

Answer:

Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number.

Explanation:

Answer:

5

Explanation:

The electrons in the outermost shell are the valence electrons. Since there are 5 electrons in the third energy level, there are 5 valence electrons.

Hope that helps.

The pennies contain a lot of copper thus they are called "coppers".

The coins are used as money. They can be looked upon as metallic money. The pennies are one of the coins that we have and they are therefore a unit of money.

The pennies are composed mostly of copper. The full components of the pennies are; 95% copper and 5% tin and zin. It is thus clear that in the penny coin, the metal that has the greatest percentage is copper hence they are called "coppers".

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Using the half-life formula, we can find the age of the sample. The formula is:

Final activity (%) = Initial activity (%) × (1/2)^(time elapsed / half-life)

In this case, final activity is 35.2%,

initial activity is 100%,

and the half-life of cesium-137 is 30.2 years.

Solving for time elapsed:

0.352 = 1 × (1/2)^(time elapsed / 30.2)

Taking the natural logarithm of both sides:

ln(0.352) = (time elapsed / 30.2) × ln(0.5)

Divide by ln(0.5):

time elapsed / 30.2 = ln(0.352) / ln(0.5)

Now, solve for the time elapsed:

time elapsed = 30.2 × (ln(0.352) / ln(0.5)) ≈ 31.5 years

So, the age of the sample is approximately 31.5 years.

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The 5-day BOD of the initial undiluted wastewater is most nearly 30 mg/L.

The 5-day BOD (Biochemical Oxygen Demand) of the initial undiluted wastewater can be determined using the dilution factor and the change in dissolved oxygen concentration.

Given that the wastewater was diluted by a factor of 1:10, this means that the diluted wastewater represents 1/10th of the original concentration.

The initial dissolved oxygen concentration of the diluted wastewater is 7.0 mg/L, and after 5 days, it decreases to 3.0 mg/L.

To find the 5-day BOD of the undiluted wastewater, we can multiply the dissolved oxygen concentration of the diluted wastewater by the dilution factor.

So, 3.0 mg/L (dissolved oxygen concentration of diluted wastewater) multiplied by 10 (dilution factor) gives us 30 mg/L.

Therefore, the 5-day BOD of the initial undiluted wastewater is most nearly 30 mg/L.

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Explanation:

intrusive rocks.....

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