When 9.6 grams of NaBr are dissolved in enough water to create a 165 gram solution what is the concentration expressed as a percent by mass

Answer: Boyle's Law states if the temperature of gas remains the same, adding pressure will decrease the volume of the gas.

Explanation: The assumptions of Boyle's law basically states that if the temperature is constant, pressurizing the gas will cause a decrease in the overall volume of the gas.

The law can be represented with the following equation:

P1 x V1 = P2 x V2

Boyle's law can calculate the volume of a gas after it undergoes a pressure change. For example, if the volume of a gas is equal to 2.2 liters at a pressure of 1.3 atm, what happens to the volume of the gas if the pressure is decreased to 0.75 atm? You can determine that after plugging in the values into the equation.

1.3 atm x 2.2 L = 0.75 x V2

Next, multiply 1.3 atm by 2.2 L. Then, divide both sides of the equation by 0.75 to get 3.81, which can be rounded to 3.8. The answer is 3.8 L = V2.

So, this shows that when the pressure is decreased, the volume increases. The relationship between pressure and volume is inversely proportional, and the opposite would happen if the pressure was increased.

If you had a balloon, the gas molecules inside would be constantly in motion, and all spaced out. However, if the balloon was put under pressure, the molecules would become more closely packed together as the space decreased inside. So, according to Boyle's Law, the volume inside the balloon would decrease due to the pressure increasing if the temperature is constant.

According to Boyle's law, the pressure of an ideal gas increases with a decrease in the volume of the container at a constant temperature.

Pressure is inversely proportional to volume.

The assumptions made in the law are that the temperature and number of moles of gases or amount of gas within a closed system are constant.

                                                 PV = k

P is the pressure of the gas

V is the volume of the gas in the container

k is constant

We can calculate pressure and volume using Boyle's law.

The balloon is inflated with air, and as the air pressure presses on the rubber, the balloon expands. The balloon's unsqueezed portion will expand outward if one end is squeezed, reducing the volume and increasing pressure inside.

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A mixture of saltwater can be separated into salt and water through a process called "evaporation." Evaporation exploits the differences in boiling points between water and salt, allowing the components to be separated.

Here's how you can do it:

Start with the mixture of saltwater in a container. The salt is dissolved in the water.

Apply heat to the container. You can do this by placing the container on a stovetop or using an open flame. As the temperature rises, the water will begin to evaporate.

The water will change from its liquid state into water vapor (a gas) due to the heat. This water vapor will rise and leave the container, leaving behind the solid salt particles.

Continue heating until all the water has evaporated. The salt will be left behind in the container.

Once the evaporation process is complete, allow the container to cool. The salt will remain in its solid form, ready for use.

It's crucial to remember that this technique works best when separating dissolved salt from water. A alternative technique, such as filtering, would be needed if you want to separate salt from water in a solution where the salt has not yet dissolved (such as sand and seawater). The evaporation technique is straightforward, however it might not be effective for large-scale separation processes. In these circumstances, more sophisticated methods like distillation may be used.

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Final answer:

Salt and water can be separated through distillation, which uses their different boiling points, or through evaporation, which utilizes the sun's heat to leave behind salt crystals as water evaporates.

Explanation:

Separation of Salt and Water

To separate a mixture of salt and water, you can use physical methods such as distillation. Distillation exploits the difference in boiling points between the two substances. In this process, the saltwater is heated until the water boils and turns into vapor. The water vapor then condenses in a cooler part of the apparatus, often a condenser, and can be collected as pure water in a receiving flask. The salt, not having a vapor phase at the boiling point of water, remains in the original container.

Another method that can be used to separate salt from water, especially on a large scale, is evaporation. Large shallow ponds, often referred to as salt gardens, are used to expose saltwater to the heat of the sun. As the water evaporates, salt crystals are left behind, which can then be collected and further purified if necessary. These methods are practical, but the choice of method depends on the desired purity and the quantity of water and salt to be separated.

Answer:

The answer id D. on EDGEN.

Explanation:

D. He should divide 338.25 by 1000.

He should divide 338.25 by 1000. Hence, option D is correct.

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

To convert a joule measurement to a kilojoule measurement, divide the energy by the conversion ratio.

The energy in kilojoules is equal to the joules divided by 1,000.

[tex]\frac{338.25 J}{1000}[/tex]

= . 33825 kJ

Hence, .33825 kJ is the energy when we convert 338.25 J to kJ.

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Answer:

Only some of the molecules of a weak base dissociate to produce hydroxide ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydroxide ions.

Explanation:

Only some of the molecules of a weak base dissociate to produce hydroxide ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydroxide ions.

Weak bases only partially dissociate in water, while strong bases fully dissociate. Strong bases produce more hydroxide ions, and they can react with acids to produce water.

The difference between a weak and a strong base lies in their ability to dissociate and produce hydroxide ions when mixed with water. Only some of the molecules of a weak base dissociate to produce hydroxide ions, while all of the molecules of a strong base dissociate to produce hydroxide ions. This means that a strong base has a higher concentration of hydroxide ions compared to a weak base. Additionally, strong bases react with acids to produce water, while weak bases do not react at all.

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Answer:

evidence from an experiment be explained in her relationship to the hypothesis as an inference

Option D, They react in similar ways.

The Nitrogen family consists of five elements, which start with nitrogen on the periodic table and move down the group or column:

Bismuth Nitrogen family elements consists of atoms having 5 electrons in their outer energy level. Two of the electrons are in the s subshell, with 3 unpaired electrons in the ​p subshell.

As you move down the nitrogen family: atomic radius increases, ionic radius increases, ionization energy decreases, and electronegativity decreases.

Nitrogen family elements often form covalent compounds, usually with the oxidation numbers +3 or +5.

Nitrogen and phosphorus are nonmetals. Arsenic and antimony are metalloids. Bismuth is a metal.

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Answer:The density of an object is 8.54 g/mL

Explanation:

Answer

be a crystalline solid

be soluble in water

conduct electricity

Explanation:

If a substance is ionic, then it will have these characteristics:

Ionic compounds are those compounds that are made by gain or losing electrons between of metal and non-metals. They are joined by ionic bonds, and ionic bonds are formed when there is electrostatic attraction between substances.

Ionic compounds dissociate into separated charged ions when they dissolve into a liquid. Example of ionic compounds are table salt, silver iodide, etc.

They contain a negative and a positive charge and are crystalline solid compounds. So, the overall compounds are neutral. They can conduct electricity.

Thus, If a substance is ionic, then it will likely have a metal and a nonmetal.

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Answer:

Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.

Explanation:

The solubility of a substance is the amount of substance that can dissolve in water (i.e solvent)

The solubility of a substance is the amount (either in mass or mole) of the substance (i.e solute) that can dissolve in a certain amount (either in litters or milliliters) of water (i.e solvent)

However, the solubility of substance is greatly influence by:

At a particular temperature and pressure, a substance may dissolve essentially well, while at other temperature, the solubility of the substance may be very low.

Thus, with the above information, we see that the solubility of substance is all about how the substance dissolve in water (i.e solvent) at a particular temperature and pressure.

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Answer:

D. 27.099 x 10²³.

Explanation:

So, 4.5 mol of Hg will contain:

(4.5 mol)(6.022 x 10²³) = 27.099 x 10²³ atoms.

So, the right choice is: D. 27.099 x 10²³.

Answer: [tex]27\times 10^{23}[/tex]

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

1 mole of [tex]Hg[/tex] contains = [tex]6.023\times 10^{23}[/tex] atoms of mercury

Thus 4.5 moles of [tex]Hg[/tex] contains = [tex]\frac{6.023\times 10^{23}}{1}\times 4.5=27.099\times 10^{23}[/tex] atoms of mercury

Thus the number of atoms in 4.5 moles of mercury are [tex]27\times 10^{23}[/tex] atoms of mercury.

Answer:

Steel is bonded together by a metallic bond.

Explanation:

There is attractions in the bond, Steel has negative electrons and positive ions, which attract each other. They hold the structure together thus forming a metallic bond.

An ion is an atom with a net electric charge due to the loss or gain of one or more electrons.

An isotopeis each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties.

Answer:

A ion is an atom of the same element with different numbers of electrons.

A isotopes is an atom of the same element with different numbers of neutrons.

Answer:

hormones - the first choice

Answer:

hormones

Explanation:

Hormones are chemical signals secreted by the endocrine glands. Each cell has receptors for the hormone molecule. Hormone secreted in the blood binds to its specific receptor on the cell surface. After binding to its receptors hormones transfer signal to the interior of the cell. Hormones are responsible for the transduction of cell signal. A very common example of hormone is insulin.

The identity of element 'y' can be determined through the periodic table of elements by identifying its atomic number. Additional data like atomic mass, electron configuration, and properties can also be useful in definitively identifying the element.

To determine the identity of element 'y', you would need to refer to the periodic table of elements, which organizes all known elements according to their atomic number (i.e., the number of protons in an atom of that element). For example, if element y has 8 protons, it is oxygen; if it has 79 protons, it is gold. If you have more specific data about element 'y', such as its atomic mass, electron configuration, chemical behavior, or physical properties, you can use this information in conjunction with the periodic table to identify the element.

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Answer:

Sugar

Explanation:

Defintion of a solute-dissolved in the solvent, sugar dissolves in water and is therefore the solute

That would be solute.

A solute is the one that gets dissolved in the solvent. Here the solute is sugar and the solvent is water.

Answer:

Hi there!

The answer to this question is: True

Atoms make up an element

Answer:

True

Explanation:

Answer:

C) Electrons orbit the nucleus of an atom.

Explanation:

Answer:

Here's what I get.

Explanation:

Bottom line: ask your teachers in advance what they expect.

Answer:

Explanation:

Molarity of acid(volume of acid)(# of H ions)= molarity of base(volume of base)(# of OH ions)

M(v)(#)=M(v)(#)

sulfuric acid    sodium hydroxide

H2SO4           NaOH

(3)(11.6)(2)=M(25)(1)

M=2.784

The molarity of the NaOH solution is 2.784 M

We'll begin by writing the balanced equation for the reaction.

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ ([tex]n_{a}[/tex]) = 1

The mole ratio of the base, NaOH ([tex]n_{b}[/tex]) = 2

From the question given above, the following data were obtained:

Volume of acid, H₂SO₄ ([tex]V_{a}[/tex]) = 11.6 mL

Molarity of acid, H₂SO₄ ([tex]M_{a}[/tex]) = 3 M

Volume of base, NaOH ([tex]V_{b}[/tex]) = 25 mL

[tex]\frac{M_{a} V_{a}}{M_{b} V_{b}} = \frac{n_{a}}{n_{a}}\\\\ \frac{3 (11.6)}{M_{b} (25)} = \frac{1}{2}\\\\[/tex]

[tex]M_{b}[/tex] × 25 × 1 = 3 × 11.6 × 2

[tex]M_{b}[/tex] × 25 = 69.6

[tex]M_{b} = \frac{69.6}{25}\\ M_{b} = 2.784 M[/tex]

Therefore, the molarity of the NaOH solution is 2.784 M

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Answer:

A

Explanation:

Answer:

A.  How does changing the amount of water affect the growth of corn?

Explanation:

To test this question, all you have to do is buy corn, and keep them all in the same area with the same amount of sunlight, temperature, etc, and only change the amount of water each plant gets.

~

Answer:

A.  How does changing the amount of water affect the growth of corn?

Explanation:

To test this question, all you have to do is buy corn, and keep them all in the same area with the same amount of sunlight, temperature, etc, and only change the amount of water each plant gets.

Answer:

It's the percent ratio of actual yield to the theoretical yield.

Explanation:

Theoretical yield is the calculated yield using the balanced chemical reaction. Actual yield is what is actually obtained in a chemical reaction. Percent yield is a comparison of the actual yield with the theoretical yield.

To compute the percent yield, it is first necessary to determine the theoretical yield, which is the maximum amount of product that could be formed from the given amounts of reactants. The theoretical yield is calculated based on the stoichiometry of the chemical equation. The actual yield, on the other hand, is what is actually obtained in a chemical reaction when it is carried out in the laboratory. The percent yield is then determined by calculating the ratio of the actual yield to the theoretical yield, multiplied by 100 to give a percentage.

Answer:

I think its higher

Explanation:

When an atom with 9 protons loses 2 electrons, it becomes a cation with a +2 charge. If it instead gains 4 electrons, it becomes an anion with a -4 charge.

Initially, an atom with 9 electrons and 9 protons is electrically neutral because the negative charges of the electrons perfectly counterbalance the positive charges of the protons. When an atom loses electrons, it becomes more positively charged or forms a cation.

Specifically, if it loses 2 electrons, it will have 7 electrons and 9 protons, resulting in a net charge of +2 as the calculation is 9 protons - 7 electrons = +2. This is represented as 2+.

Conversely, when an atom gains electrons, it becomes more negatively charged or forms an anion. If the atom gains 4 electrons to have 13 electrons and 9 protons, the net charge would be -4, since the calculation here is 9 protons - 13 electrons = -4. This is represented as 4-.

Therefore, the net charge will be -4.

Answer:

The answer is: A strong acid will produce a greater amount of ions than a weak acid.

Explanation:

The key difference between weak and strong acid is that weak acids partially ionize in water while strong acids completely ionize.

The answer is: A strong acid will produce a greater amount of ions than a weak acid.

The main difference between a strong and a weak acid is the extent of their ionization in water. Strong acids fully dissociate into ions, making them strong electrolytes, while weak acids only partially dissociate and are therefore weak electrolytes.

The difference between a strong acid and a weak acid lies in their ability to dissociate in water. A strong acid, like hydrochloric acid (HCl), dissociates completely in water, meaning it ionizes 100% into H+ (hydrogen ions) and its corresponding anion (e.g., Cl- for HCl), making it a strong electrolyte. On the other hand, a weak acid, such as acetic acid found in vinegar, only partially dissociates in water, resulting in a mixture of undissociated molecules and ions. Therefore, weak acids are considered weak electrolytes because they produce fewer ions in solution.

This distinction is crucial because it affects how the acid reacts in an acid-base reaction. While both strong and weak acids can react with bases, a strong acid will produce a larger amount of ions than a weak acid, which has a significant impact on the equilibrium and strength of the acid in solution.

Hello! Your answer would be a gain of electrons and a decrease in positive charge.

Contrary to how it sounds, reduction is actually a gain of electrons. It is part of a set of reactions known as a redox reaction, reduction being a gain of electrons and oxidation being a loss.

With the gain of electrons, the element would become more negative as electrons bring with them a negative charge. Therefore, this would decrease the positive charge.

Hope this helped!

Answer:

I believe that the answers are:

1) loss

2) increase

Answer:

D

Explanation:

D states a problem because of the population growing. Regulate means control and d stated that their was a problem and a need to control it. Therefore, d I'd really the only valid answer.

Final answer:

The need for population regulation is supported by the fact that a growing population intensifies environmental and social issues. Strategies like education and economic security can lead to lower birth rates, which is crucial for sustainable development and manageable population growth.

Explanation:

The statement supporting the need for population regulation is D) Billions more people on the Earth will intensify many environmental and social problems. This is because the carrying capacity of the Earth has been exceeded, leading to environmental degradation and resource depletion. Global efforts to curb population growth, such as China's one-child policy, have been both controversial and variably effective. Nonetheless, as the human population continues to increase, the pressures on food production, water resources, and global stability escalate, with the United Nations projecting potential population numbers ranging from 6 to 16 billion by 2100.

Population control is not just about reducing numbers; it's also about ensuring sustainable development and equitable resource distribution, which are vital for economic stability and avoiding social strife. Education, particularly for women, and the provision of economic security are recognized strategies that naturally lead to lower birth rates, thereby assisting in the management of population growth without the need for coercive policies.

To calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2, we need to use the correct conversion factors. The first conversion factor to use is 1 mol CH4 / 16.0 g CH4, followed by 1 mol CO2 / 1 mol CH4, and finally 44.0 g CO2 / 1 mol CO2.

In order to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2, we need to use the appropriate conversion factor. Based on the balanced chemical equation, we can see that the ratio between CH4 and CO2 is 1:1. Therefore, the correct conversion factor to use first is:

1 mol CH4 / 16.0 g CH4

This conversion factor allows us to convert the given mass of CH4 to moles of CH4.

Next, we can use the mole ratio from the balanced chemical equation to convert moles of CH4 to moles of CO2:

1 mol CO2 / 1 mol CH4

Finally, we can use the molar mass of CO2 to convert moles of CO2 to grams of CO2:

44.0 g CO2 / 1 mol CO2

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Answer:

[tex]\boxed{\text{70 L}}[/tex]

Explanation:

We can use the Ideal Gas Law to solve this problem

pV = nRT

Data:

p = 1.1 atm

n = 3.2 mol

R = 0.082 16 L·atm·K⁻¹mol⁻¹

T = 295 K

Calculation:

[tex]\begin{array}{rcl}1.1V\text{ atm} & = & \text{3.2 mol} \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{295 K}\\1.1V & = & \text{77.5 L}\\\\V & = &\dfrac {\text{77.5 L}}{1.1}\\\\V & = & \text{70 L}\\\end{array}\\\text{The volume is }\boxed{\textbf{70 L}}[/tex]

The volume of 3.2 moles of chlorine gas at 295 K and 1.1 atm is calculated using the Ideal Gas Law and is approximately 69.89 liters.

The volume of 3.2 moles of chlorine gas (Cl2) at 295 K and 1.1 atm can be calculated using the Ideal Gas Law, which is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Firstly, let's rearrange the Ideal Gas Law to solve for V (volume):

V ={nRT}÷{P}

We plug in the values:

n = 3.2 moles

R = 0.0821 L atm / (mol K) (the ideal gas constant)

T = 295 K

P = 1.1 atm

So, the calculation is:

V = {3.2 × 0.0821 × 295}÷{1.1}

Calculation yields:

V ≈ 69.89 liters

Therefore, the volume of 3.2 moles of chlorine gas at 295 K and 1.1 atm is approximately 69.89 liters.

Answer:

The radius of a nitride ion is much larger than that of a nitrogen atom.

Explanation:

You are adding three extra electrons to the same energy shell.

This greatly increases electron repulsions.

The volume increases to give the electrons more room and decrease the repulsions.

The radius increases by a factor of 2.3 and the volume increases by a factor of 12.

The radius of the atom has been increased with the acquisition of the-3 charge.

The radius of an atom has been defined as the distance of the nucleus to the outermost electron. The loss and addition of electrons to the atom has results in the charge along with the change in radius.

The negative charge to the atom has been imposed with the gain of electrons. Thus, the nitrogen ion has been formed with the gain of 3 electrons.

The increase in the number of electrons results in the increased repulsion to the outermost electron from the nucleus. Thus, the radius of the atom has been increased with the acquisition of the-3 charge.

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