2. Only one of these states is true. Which one is it? (6.P.2.1) *
OTwo atoms of the same elements can have different properties.
Non-living things are made up of elements, but living things are not.
Something can be made out of atoms even if it is not matter.
O Anything that is matter has mass and volume.

Answer:

Condensation

Explanation:

Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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The process of gas effusion involves a hole, where the gas escapes. Lower molecular mass gases emit more quickly than greater molecular mass gases is( n2 and co )

The rate law demonstrates how the rate of a chemical reaction is influenced by the reactant concentration. The mathematical explanation provided by the Rate laws demonstrates how variations in a substance's amount can alter the rate of a chemical reaction.

The molecular mass is connected to the relative rates of effusion.

a) M(N₂)/M(O₂) = 28/32 = 0,875

b) M(N₂O)/M(NO₂) = 44/46 = 0,956

c) M(CO)/M(CO₂) = 28/44 = 0,636

d) M(NO₂)/M(N₂O₂) = 44/58= 0,758

e) M(CO)/M(N₂) = 28/28 = 1, CO and N₂ The equation for the elementary step is if the reaction takes place in the single elementary step, which is the three-body molecular collision. have inexact molecular masses and will effuse at nearly identical rates.

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Answer:

Explanation:

To calculate the mass of carbon dioxide (CO2) produced by a quarter gallon of gasoline, we'll need the following information:

1. The molar mass of carbon dioxide (CO2): approximately 44.01 grams/mol.

2. The molarity of gasoline: 0.923 M.

3. The volume of gasoline: 1000 mL.

First, we need to convert the volume of gasoline from milliliters (mL) to liters (L):

1000 mL = 1000/1000 = 1 L

Next, we can use the equation relating molarity, volume, and number of moles:

Molarity (M) = Moles (mol) / Volume (L)

Rearranging the equation, we can solve for moles:

Moles (mol) = Molarity (M) * Volume (L)

Moles (mol) = 0.923 M * 1 L = 0.923 mol

Finally, we can calculate the mass of carbon dioxide produced by multiplying the number of moles by the molar mass:

Mass (g) = Moles (mol) * Molar mass (g/mol)

Mass (g) = 0.923 mol * 44.01 g/mol ≈ 40.60 g

Therefore, approximately 40.60 grams of carbon dioxide are produced by burning a quarter gallon of gasoline.

Explanation:

It is not possible to find the radius of a cylinder with only its length and mass. Additional information, such as the density or volume of the cylinder, would be needed.

Answer:

C. Release CO2 due to can opening

Explanation:

Le Châtelier’s principle states that when a reaction is at equillibrium and it is disturbed it will respond to return to equilibrium.

SO

H2O(l) + CO2(g) <-------------------> H2CO3(aq)

When you open a bottle of coke it is under pressure and not at equillibrium so it reacts by releasing the gas to reach equilibrium it can be seen in the equation above just that this is for club soda not coke, the idea applies though

The elements react with Na to form an ionic compound in a one-to-one ratio option D). Br, because it has the same number of valence electrons as Cl.

An ionic compound is a chemical compound composed of ions held collectively with the aid of electrostatic forces termed ionic bonding. The compound is impartial typical but includes undoubtedly charged ions known as cations and negatively charged ions referred to as anions.

Ionic compounds are ion compounds. these ions are atoms that benefit or lose electrons, resulting in an internet superb or negative price. Metals generally tend to lose electrons, so they have a internet advantageous rate and turn out to be cations. Non-metals tend to benefit electrons, creating a net negative charge of anions.

The ionic bond idea is that a definitely charged ion bureaucracy is a bond with a negatively charged ion and one atom passes electrons to another. An example of an ionic bond is Sodium Chloride, a chemical compound.

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Disclaimer:- your question is incomplete, please see below for the complete question.

if na reacts with chlorine to form nacl, which of the following elements reacts with na to form an ionic compound in a one-to-one ratio, and why?

A).K , because it is in the same group as Na .

B).Mg, because its mass is similar to that of Na.

C).Ar because its mass is similar to that of Cl.

D).Br, because it has the same number of valence electrons as Cl.

Answer:

c

Explanation:

electrons

The electrons of an atom involved in the formation of a chemical bond are called valence electrons. Therefore, option (A) is correct.

Valence electrons can be defined as the electrons present in the outermost shell of an atom while the electrons occupied in the inner shell are called core electrons. Lewis structures can be helpful to determine the number of valence electrons and know the types of chemical bonds.

Valence electrons are distributed in different shells and these electrons are cause interaction between different atoms and responsible for the formation of chemical bonds between atoms to complete their octet.

Only electrons filled in the outermost shell can able participate in the formation of a chemical bond or a molecule and decide the reactivity of the element.

For example, the elements of group 1 have one electron in their valence shell. They have a great tendency to lose that electron to acquire the configuration of the nearest noble gas.

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Answer: KE = 8.6917248 J

I'm not for sure but I am pretty positive this is the answer

Acetic acid only partially ionizes in water as it is a weak acid.

Weak Acids are the acids that do not completely dissociate into their constituent ions when dissolved in solutions.

When dissolved in water, an equilibrium is established between the concentration of the weak acid and its constituent ions.

Acetic acid, also known as ethanoic acid, is a weak acid with the chemical formula CH₃COOH. It is known to be the active component of vinegar.

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Iron released 2.495 joules of heat.

To calculate the amount of heat absorbed or released by 90.23g of iron, we need to use the specific heat of iron and the change in temperature.

Iron has a specific heat capacity of 0.45 J/g °C, which means that it takes 0.45 Joules of energy to raise the temperature of 1 gram of iron by 1 degree Celsius.

First, we need to convert the mass of iron from grams to kilograms.

Iron mass = 90.23 g = 0.09023 kg

Now we need to calculate the temperature change. The initial temperature of the iron is T = 86°C, but the final temperature is unknown. Assuming that the iron undergoes a process that neither loses nor gains heat through the environment, the following equation can be used.

heat absorbed = heat released

This means that the amount of heat absorbed by iron is equal to the amount of heat given off by the environment. So you can use the following formula:

Heat absorption = mass x specific heat capacity x temperature change

Since there is no heat loss or gain to the environment, we can assume that the temperature of the environment is constant at 25°C. So the temperature change is:

temperature change = final temperature - initial temperature

Temperature change = 25°C - 86°C

Temperature change = -61°C

Note that the temperature change is negative because iron loses heat.

Now you can insert the value.

Heat absorbed = 0.09023 kg × 0.45 J/g °C × (-61 °C)

heat absorbed = -2.495 J

Since the value is negative, this indicates that the iron lost heat to the environment and the environment gained heat.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

C

Explanation:

because its half life is shorter than the subsequent ones

Answer:

V₁ = 808.9mL

Explanation:

Based on Charles's law, the volume of a sample of gas is directely proportional to its absolute temperature. The formula is:

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

The initial state is:

V₁ = Our incognite

T₁ = 79°C + 273.15 = 352.15K

Final state is:

V₂ = 990.4mL

T₂ = 158°C + 273.15 = 431.15K

Replacing:

\(\frac{V_1}{352.15K} =\frac{990.4mL}{431.15K}\)

Considering the Charles's Law,  the volume at 79 °C is 808.86 mL.

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure.

This law says that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement they have the gas molecules.

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T}=k\)

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

\(\frac{V1}{T1}=\frac{V2}{T2}\)

In this case, you know:

Replacing in Charles's law:

\(\frac{V1}{352 K}=\frac{990.4 mL}{431 K}\)

Solving:

\(V1=\frac{990.4 mL}{431 K}x352 K\)

V1=808.86 mL

Finally, the volume at 79 °C is 808.86 mL.

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45° Celsius

Formula (113°F − 32) × 5/9 = 45°C

The proximity of unsaturated groups (C=C, C=O, aromatic) and electronegative atoms (O, N, halogen) has an impact on the proton NMR chemical shift. Electronegative groups shift to the left (down field; ppm rise).

The chemical shift in nuclear magnetic resonance (NMR) spectroscopy refers to the atomic nucleus' resonant frequency in relation to a standard in a magnetic field. The location and quantity of chemical changes frequently serve as diagnostic indicators of molecular structure.

You take into account the chemically non-equivalent proton(s) one at a time while making chemical shift predictions. Find the origin of each proton or proton pair that is not chemically comparable. Whether the proton(s) is/are linked to a methyl, methene, or methine determines the beginning point.

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Answer:

group. hfdzybidddiklllnjjooolll

Answer:

An organ system

Explanation:

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Answer:

Meth- its full name is Methane

Explanation:

1 methane

2 ethane

3 propane

4 butane

5 pentane

6 hexane

7 heptane

8 octane

9 nonane

10 decane

11 undecane

12 dodecane

Answer: The pressure in the can is 4.0 atm

Explanation:

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = ?

V = Volume of gas = 0.410 L

n = number of moles = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{3.0g}{44.1g/mol}=0.068mol\)

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(20^0C=(20+273)K=293K\)

\(P=\frac{nRT}{V}\)

\(P=\frac0.068mol\times 0.0820 L atm/K mol\times 293K}{0.410L}=4.0atm\)

Thus the pressure in the can is 4.0 atm

The species which will require the least energy for the removal of one

electron is Na+.

This is the energy required to remove an electron from an isolated neutral

atom. Elements which have lesser electrons in their outermost shell

require a lower ionization energy.

In this scenario, Magnesium is further to the right on the periodic table

than Sodium. This means it will be harder to remove an electron from its

outer shell.  This thereby means Na+  will require the least energy for the

removal of one electron.

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

Answer:

1. FASTER THAN- #2

2. WARMER THAN #1

3. OCCUR FROM SUBSTANCE B TO SUBSTANCE A- #3

Explanation:

I did the assignment On edg And got it right

Answer:

Use the image to complete the sentences.  

At left a grid labeled A of regularly arranged orange balls with small movement lines near each. At right a grid labeled B of regularly arranged orange balls with large movement lines near each.

Two different substances, Substance A and Substance B, are in direct contact with each other and are at different temperatures.

The particles in Substance B are vibrating

✔ faster than

the particles in Substance A. This means Substance B is

✔ warmer than

Substance A and conduction will

✔ occur from Substance B to Substance A

.

Explanation:

I know im late

Answer:

98.08 g/mol

Explanation:

Hope this helps.

The concentration of copper sulfate solution is 11ppm.

The calibration curve for copper sulfate is shown in the figure below.

copper sulfate is a compound of copper and sulfuric acid with the chemical formula CuSO4.To find the concentration of copper sulfate solution with an absorbance reading of 0.280 at 650 mm, we can use the equation:

Concentration (ppm) = m x absorbance + b,

where m is the slope of the graph and b is the y-intercept of the graph.

Using the graph, we can calculate m and b as follows:

\(m =\frac{ (20 - 0)}{(0.750 - 0.250)} = 40\\b = 0 - (40 *0.250) = -10\)

Therefore, the concentration of copper sulfate solution with an absorbance reading of 0.280 at 650 mm is:

Concentration (ppm) = \(40 * 0.280 - 10 = 11 ppm\)

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Answer:

\(MgI_2\\\\MgO\\\\CrI_4\\\\ CrO_2\)

Explanation:

Hello!

In this case, we can notice that among the given ions, Mg2+ and Cr4+ are cations and I- and O2- are anions, thus, for each resulting compound we switch the oxidation states as subscripts to get:

\(Mg^{2+}I^- \rightarrow MgI_2\\\\Mg^{2+}O^{2-} \rightarrow MgO\\\\Cr^{4+}I^-\rightarrow CrI_4\\\\Cr^{4+}O^{2-}\rightarrow CrO_2\)

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