If balloon containing 6.8mol of helium was increased to 35C and the volume of the balloon only expanded slightly to 1.5L

The mass of (NH4) 2S in the solution is : Mass = 0.0600 mol × 60.08 g/mol = 3.60 g.

The given molarity and volume of the solution can be used to calculate the number of moles of ammonium sulfide (NH4)2S.Then, the number of moles can be converted to mass using the molar mass of (NH4)2S.Mass of ammonium sulfide (NH4)2S in 3.00 L of a 0.0200 M solution is given by : Mass = moles × molar mass.The number of moles of (NH4)2S can be found using the equation:Molarity = Number of moles / Volume.Rearranging this equation, we get:Number of moles = Molarity × Volume Number of moles of (NH4)2S = 0.0200 M × 3.00 L.Number of moles of (NH4)2S = 0.0600 mol.The molar mass of (NH4)2S can be calculated by summing the molar masses of ammonium (NH4) and sulfide (S) ions.Molar mass of (NH4)2S = (2 × Molar mass of NH4) + Molar mass of S= (2 × 14.01 g/mol) + 32.06 g/mol= 60.08 g/mol.

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Answer:

there are used to where large volumes are needed to be transferred and coloured graduated marks make it easier to measure the volumes. the disadvantage isthat they are not so precise and there are greater changes of human error

Answer:

may be mp3 player......

Answer:

mp3 player

Explanation:

Neon sign contains Neon

Flash camera contains Xenon

Helium balloon contains Helium

Answer:

Explanation:

Here, we want to know what happens to a solution that becomes more acidic

A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller

What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5

Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)

The temperature is always the same.

Assume we have something in solid phase. As we increase the temperature, the particles on the solid increase their kinetic energy, thus, the particles move more.

This causes that the volume of the object increases (for example when we heat up a metal and it dilates) and this keeps happening until we reach a critical point, when we are near a change of phase.

At this point the energy given is not used to increase the temperature of the object, but is used to "break" bonds in such a way that the particles are more free than before.

When all these bonds are "broken" the change of phase is completed, and in the case of the solid, we go from solid phase to liquid phase.

So, the temperature is always the same at the beginning of a change of state compare with the temperature at the end of the change

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Answer:

To calculate the number of neutrons, subtract the atomic number (which equals the number of protons) from the mass number.

hope this helps☆☆☆

An example of a physical change is the process of tempering steel to form a knife blade.

physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

It is hypothesized that as the temperature of the air inside the plastic bottle decreases, the volume of the air will decrease as well, in accordance with Charles's Law and the contraction of the plastic bottle.

Hypothesis:

Based on the ideal gas law and the behavior of gases, it is hypothesized that when the temperature of the air inside a plastic bottle is decreased, the volume of the air will decrease as well. This hypothesis is rooted in the understanding that gases tend to contract and occupy less space when their temperature decreases.

According to Charles's Law, which states that the volume of a gas is directly proportional to its temperature when pressure is held constant, it is expected that as the temperature of the air in the plastic bottle decreases, the gas molecules will lose kinetic energy, resulting in a decrease in their average speed. This decrease in speed will lead to a decrease in collisions between the gas molecules and the walls of the container, causing the air to occupy less volume.

Furthermore, since the air is trapped inside a plastic bottle, the decrease in temperature is expected to cause the plastic to contract slightly, exerting additional external pressure on the gas molecules and further reducing the volume they occupy.

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Answer:

coz it doesn't meet the three criteria the iau uses to define a full sized planet

Explanation:

it meet all other except one :has no cleared its neighboring region of other object

The valence electrons are present in the outermost shell of an atom or an ion. The valence electrons play a significant role in chemical bonding. The chemical properties of an element depend on the valence electrons it possesses.

The valence electrons participate in the chemical reaction.Each chlorine atom in a Cl2 molecule has seven valence electrons. Since there are two chlorine atoms in the Cl2 molecule, the total number of valence electrons in Cl2 is 14. Valence electrons can be represented by dots around the element's symbol. Chlorine, for example, is a Group 7 element with seven valence electrons. A Cl atom, for example, is shown with seven dots, one for each valence electron. Chlorine has the electron configuration 1s22s22p63s23p5. The valence electrons of chlorine are in the 3s and 3p orbitals, and there are seven of them.Therefore, there are 14 valence electrons in a Cl2 molecule.

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Non-combustible

eg:-glass,water,stone, Portland cement etc ...

Answer:

Noncombustible

Explanation:

So

Some examples are ,glass ,stone

91 is the proton number and 36 is the neutron. fusion has a nearly limitless source of fuel and produces less radioactive material than fission, it presents an intriguing option.

Thus, The challenges in using fusion offset these advantages. It is expensive to produce the ideal circumstances for a fusion reaction, and these reactions are difficult to regulate.

While scientists continue to work on managing nuclear fusion in an effort to create a fusion reactor that can produce electricity, research into improved ways to harness the power of fusion is still in the experimental stages.

Nuclear reactions that produce energy include both fission and fusion, although the methods are very dissimilar. A heavy, unstable nucleus can fission into two lighter nuclei, while two light nuclei can fuse together.

When two low-mass isotopes, usually hydrogen isotopes, combine at extremely high pressures and temperatures, fusion occurs.

Thus, 91 is the proton number and 36 is the neutron. fusion has a nearly limitless source of fuel and produces less radioactive material than fission, it presents an intriguing option.

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Answer:Metals have a less likely chance to gain electrons because it is easier to lose their valance electrons and form cations. It is easier to lose their valence electrons because metals' nuclei do not have a strong pull on their valence electrons. Thus, metals are known to have lower electron affinities

Explanation:

hope this helps

Main answer:The procedure mentioned in Part C requires the user to mix different water temperatures in order to obtain a specific final temperature. This experiment is called a calorimeter experiment. The aim of the experiment is to determine the amount of heat transfer.

The substance inside the calorimeter is usually a liquid, although it can be a gas or a solid. The substance in the calorimeter is then heated or cooled by some external source, and the change in temperature of the substance is measured. The amount of heat transferred to the substance can then be calculated using the concept of specific heat. Specific heat is a measure of how much heat is required to raise the temperature of a unit mass of a substance by one degree Celsius (or one degree Fahrenheit). In order to perform this experiment, the following procedure should be followed:1. Prepare the calorimeter by filling it with a known amount of water. The water should be at room temperature (around 20°C or 68°F).2. Measure the temperature of the water in the calorimeter using a thermometer. Record this temperature.3. Fill a beaker with a known amount of water. This water should be at a higher temperature than the water in the calorimeter. Measure the temperature of this water using a thermometer. Record this temperature.4. Pour the hot water into the calorimeter.

Stir the water in the calorimeter until the temperature of the water becomes constant.5. Measure the final temperature of the water in the calorimeter. Record this temperature.6. Calculate the amount of heat transferred from the hot water to the water in the calorimeter. This can be done using the following formula:Q = mcΔTwhere Q is the amount of heat transferred, m is the mass of the water in the calorimeter, c is the specific heat of water, and ΔT is the change in temperature of the water.7. Repeat the procedure from part C to complete three more trials. The temperature of the hot water in each trial should be the same as the temperature of the hot water in part C. But the cold water should be at a different temperature than in part C. Use any three temperature points between 15°C and 35°C (59°F and 95°F). Record your data in the table It is recommended to carefully  understand the topic of the experiment.

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For three additional trials, maintain the hot water temperature while varying the cold water temperature between 15°C and 35°C. Record the data in a table, including amounts, temperatures, and precipitation time. Cleaning equipment between trials is essential. These trials help understand the impact of temperature on precipitation in the solution.

To conduct three additional trials, follow the procedure described in part C while adjusting the temperature of the cold water within the range of 15°C to 35°C (59°F to 95°F). Maintain a consistent hot water temperature as used in part C. Record the data obtained from each trial in a table.

Ensure that the hot water temperature remains constant to establish a controlled comparison of the impact of varying cold water temperatures on the experiment's outcome. Measure and record the amounts of and water used, along with the initial and final temperatures of the mixed solution. Note the time it takes for precipitation to occur and record it.

After each trial, thoroughly clean the test tube and any other equipment used to prevent contamination between trials. Create a table to record the data from each trial, including the hot water temperature, cold water temperature, amounts of and water, initial and final temperatures, and precipitation time.

By conducting these additional trials with different cold water temperatures, you can observe how temperature variations affect the rate of precipitation in the solution. Analyzing this data will provide a more comprehensive understanding of the experiment's results and any temperature-dependent patterns that may emerge.

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Answer:

a

Explanation:

I'm not completely sure tho veary sorry if it's wrong

Answer:

the answer is C

Explanation:

as the yeast feeds on sugar and yields the ATP per glucose molecule and Carbon dioxide

At Location C, nightfall is experienced by the Northern Hemisphere. At Location C, the Northern Hemisphere is inclined away from the Sun.

The Northern Hemisphere tilts away from the Sun at its greatest angle around December 21. We experience the least amount of daylight at this time of year, which is known as the northern winter solstice.

The Earth's axis is tilted most closely towards the sun twice a year during what are known as the solstices. The longest day occurs in the hemisphere that is slanted most towards our star, whereas the longest night occurs in the hemisphere that is tilted away from the sun.

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The density of gasoline id 0.008 g/ml is 18.64 gram.

Density is defined as mass per unit volume it means that mass is present in one meter cube.

S.I unit of density is kg/meter^3.

Mathematically

Density = Mass/Volume.

In above question

Volume = 2330 mL

Density = 0.008 g/mL

Density = mass/ volume

So,

Mass = density x volume

Mass = 0.008 x 2330

Mass = 18.64 gram

Therefore, The density of gasoline id 0.008 g/ml is 18.64 gram.

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Answer:

C. The ocean waters are heating up which leads to warmer, less dense air rising to form clouds

Explanation:

Greenhouse gases, due to their ability to trap heat, has caused an increase in the Earth's atmospheric temperature called GLOBAL WARMING. The result is that more heat is being radiated down to Earth from the sun. This could lead to hurricanes in water bodies.

Hurricanes are forceful storms that occurs when ocean waters heat up leading to warmer, less dense air that rises to form clouds. Hurricanes are called tropical cyclones.

Hurricanes have resulted from the heating of ocean water, forming clouds. Thus, option C is correct.

Hurricanes are tropical cyclones that arose from the central low atmospheric pressure zone. The strong winds, thunderstorms and heavy rains are symbolizes hurricanes.

The greenhouses are the molecules that are present in the earth's atmosphere and are able to trap solar energy. The greenhouse gases are able to keep the earth warm.

The increase in greenhouse gases results in an increase in the temperature of the earth, leading to global warming.

The increased temperature of the earth leads to the warming of the oceans. The rise in the temperature results in the formation of low pressure and clouds.

The low-pressure results in the thunderstorms, that form the clouds and results in hurricanes.

Therefore, hurricanes have resulted from the heating of ocean water, forming clouds. Thus, option C is correct.

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3 H₂    +    N₂   →   2 NH₃

   ↓            ↓

4 mol       3 mol

Since the moles of N₂ is the smaller of the two reactants, then N₂ is the limiting factor (the reactant that will decide how much ammonia is produced since it has the smaller amount of moles). ∴ we have to use it in calculating the number of moles of ammonia

The mole ratio of N₂ to NH₃ based on the balanced equation is 1 to 2.

∴ the moles of NH₃ = moles of N₂ × 2

                                =  3 moles × 2

                                = 6 moles

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

Oxygen has more protons than hydrogen and water's shared electrons are drawn to it.

Explanation:

The energy of a mole of blue photons is determined as  4.68 x 10⁻¹⁹ J.

The amount of energy carried by a photon is directly proportional to the photon's electromagnetic frequency and inversely proportional to the wavelength of the photon.

E = hf

E = hc/λ

where;

The energy of a mole of blue photons is calculated as follows;

E = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (425 x 10⁻⁹)

E = 4.68 x 10⁻¹⁹ J.

Thus, the energy of a mole of blue photons is determined as  4.68 x 10⁻¹⁹ J.

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For the hypothetical atom with a mass number of 85 and an atomic number of 44, a real atom of this isotope (Ruthenium) would have:

Protons (p) = 44

Neutrons (n) = 41

Electrons (e) = 44

The hypothetical atom with a mass number of 85 and an atomic number of 44 represents an isotope of the element Ruthenium (Ru). To determine the number of protons, neutrons, and electrons in a real atom of this isotope, we need to understand the atomic structure.

The atomic number (Z) represents the number of protons in an atom. Since the atomic number is given as 44, the number of protons (p) in the atom is 44.

The mass number (A) represents the total number of protons and neutrons in the nucleus of an atom. In this case, the mass number is given as 85. Therefore, the number of neutrons (n) can be calculated by subtracting the atomic number (protons) from the mass number:

Neutrons (n) = Mass number (A) - Atomic number (Z)

Neutrons (n) = 85 - 44

Neutrons (n) = 41

To determine the number of electrons (e), we assume that the atom is neutral, meaning it has an equal number of protons and electrons. Therefore, the number of electrons is also 44.

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NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate.

The balanced equation for the reaction of NaHCO3(s) with HC2H3O2(aq) including phase symbols is

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

Baking soda, also known as sodium bicarbonate, is a white, crystalline powder with the chemical formula NaHCO3. It is an alkaline substance that neutralizes acids.

Vinegar is mostly composed of acetic acid, HC2H3O2, which is a weak acid. Vinegar has a sour flavor and a strong smell due to the presence of acetic acid.

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)  This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate. When the baking soda and vinegar are combined, a chemical reaction occurs, causing carbon dioxide gas bubbles to form. This is due to the reaction between the acid and base in the mixture, which generates carbon dioxide gas as a byproduct. This reaction is commonly used in baking as a leavening agent to make cakes, muffins, and other baked goods rise.

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Answer:

The 2 beakers of water will have different boiling points because the boiling point of water  is a physical property and the property is independent of the amount of water.

Explanation:

Got 100 on my test

The malady affecting Tank 104, characterized by volatile aromas, a brownish color, and a flat, dull taste, is likely a result of microbial spoilage known as acetic acid bacteria (AAB) infection or acetobacter infection.

The significant increase in acetic acid concentration from 0.65 g/L to 2.73 g/L suggests the presence of acetic acid bacteria, which metabolize ethanol into acetic acid during the fermentation process. This bacterial infection leads to the production of acetic acid, causing the wine to have a vinegary or sharp taste and volatile aromas.

The increase in lactic acid concentration from 0.75 g/L to 3.40 g/L indicates the activity of lactic acid bacteria, which can also contribute to wine spoilage. These bacteria convert malic acid into lactic acid, resulting in changes in acidity and flavor.

The increase in pH from 3.70 to 4.10 and the significant drop in tartaric acid from 2.7 g/L to 0.06 g/L further support the presence of bacterial activity, as these changes are consistent with microbial metabolism.

In this case, the prolonged exposure to elevated temperatures due to the power outage created favorable conditions for the growth and activity of acetic acid bacteria and lactic acid bacteria.

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Explanation:

P1V1 = P2V2

(100.7 kPa)(0.75 L) = (99.8 kPa)V2

V2 = (100.7 kPa)(0.75 L)/(99.8 kPa)

= 0.757 L

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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If we had used 4 grams of NaOH instead of 2 grams, the heat gained by the solution would have been higher.

The term enthalpy has to do with the heat that could be emitted or evolved in a given reaction. We know that in a neutralization reaction, there is an evolution of heat and as such the reaction  vessel would feel warm at the end of the reaction.

Also, the enthalpy would depend on the amount of the limiting reactant. In this case, the limiting reactant would be the sodium hydroxide and as such the enthalpy would affected by a change in the amount of the sodium hydroxide.

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