A student increases the temperature of a 456 cm3 balloon from 255 k to 400 k.
assuming constant pressure, what should the new volume of the balloon be?

please hurry

Answer:

To calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100.

When adding ice to a hot soup, it is generally recommended to use ice made from potable or drinkable water.

The water used to make the ice should be clean and free from any contaminants that could affect the taste or safety of the soup.

It is advisable to use filtered or purify water to make the ice to ensure that it is of good quality. This helps prevent any unwanted flavors or impurities from transferring to the soup.

Using tap water can also be acceptable if it meets the drinking water standards in your area and is considered safe for consumption. However, if you have concerns about the quality of your tap water, using filtered water is a safer option.

Ultimately, the goal is to add ice made from water that is safe and of good quality to avoid any negative impact on the taste or safety of the soup.

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To determine the final volume of a gas, we need to know the molar mass of the gas and the conditions of temperature and pressure. In this case, we are given the mass of the substance (25 grams) and the temperature (100.0°C) and pressure (1 atm) at which it is decomposed.

However, we are not given the molar mass of (NH4)2CO3. Without knowing the molar mass, we cannot calculate the number of moles of gas produced during the decomposition. And without knowing the number of moles, we cannot determine the final volume of the gas using the ideal gas law.

Therefore, without the molar mass of (NH4)2CO3, we cannot determine the final volume of the gas.

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The extremophile that has evolved in conditions of extreme drought is the xerophile, while the extremophile that has evolved in conditions of extreme salt is the halophile.

Extremophiles are organisms that thrive in extreme environments, where most other life forms cannot survive. They have developed unique adaptations to withstand and thrive in these extreme conditions. Two types of extremophiles specifically adapted to different extreme environments are xerophiles and halophiles.

Xerophiles are extremophiles that have evolved to survive in conditions of extreme drought. They are adapted to environments with very low water availability or high water stress. These organisms have developed mechanisms to prevent water loss, such as efficient water retention and protection of cellular structures. Xerophiles can be found in desert environments and other arid regions.

On the other hand, halophiles are extremophiles that have evolved to live in conditions of extreme salt concentration. They are adapted to environments with high salinity, such as salt flats, salt lakes, and hypersaline environments. Halophiles have specialized adaptations to cope with the osmotic stress caused by high salt concentrations. They have enzymes and transport proteins that function in high-salt environments and can maintain osmotic balance within their cells.

In summary, xerophiles have evolved in conditions of extreme drought, while halophiles have evolved in conditions of extreme salt. These extremophiles showcase remarkable adaptations to thrive in their respective harsh environments.

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Aldohexose has four chiral carbons, making its quantity of 3-D isomers equal to 2n=24=16. Eight of these 16 isomers are D-configuration and eight are L-configuration.

According to the general rule, chiral carbon centres are carbon atoms that are positioned at the corners of a tetrahedron and have four distinct substituents connected to them. The terms "stereogenic carbons" and "asymmetrical carbon atoms" are also used to describe chiral carbon atoms.
Searching for carbons with four distinct substituents is the secret to discovering chiral carbons. Any carbons that are engaged in double bonds or that have two hydrogens attached can be instantly removed. This leads us to the conclusion that there are three chiral carbons.
Aldohexose has four chiral carbons, making its quantity of 3-D isomers equal to 2n=24=16. Eight of these 16 isomers are D-configuration and eight are L-configuration.
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Answer:

To find the pressure of the dry hydrogen gas alone, we need to subtract the pressure exerted by the water vapor from the total pressure of the mixture.

First, we need to convert the vapor pressure of water from mmHg to kPa:

11.9 mmHg x (1 kPa / 7.5006 mmHg) = 0.0159 kPa

Next, we need to subtract this value from the total pressure of the mixture:

113.0 kPa - 0.0159 kPa = 112.9841 kPa

Therefore, the pressure exerted by the dry hydrogen gas alone is 112.9841 kPa.

Explanation:

The m/v% concentration for the sugar solution is **4.20%**, while the m/m% concentration for the medication in the tablet is **41.94%**.

To calculate the concentration for each solution, we'll use the appropriate concentration formulas. For the sugar solution, we'll use the mass/volume percent (m/v%) formula: (mass of solute ÷ volume of solution) × 100. We have 4.20 grams of sugar dissolved in 72.0 mL of water, so (4.20 g ÷ 72.0 mL) × 100 = 4.20%. For the medication in the tablet, we'll use the mass/mass percent (m/m%) formula: (mass of solute ÷ mass of tablet) × 100. We have 325 mg of medication in a 775 mg tablet, so (325 mg ÷ 775 mg) × 100 = 41.94%.

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Answer:

the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom.In a periodic table arranged in order of increasing atomic number, elements having similar chemical properties naturally line up in the same column.

The elements on the periodic table are arranged on the basis of highlighting similarities between elements. Thus, the correct option for this question is A.

The elements on the periodic table are basically arranged on the basis of increasing their atomic number. These atomic number is represented by the number of protons in the nucleus of an element.

According to the question, the elements possessing identical chemical properties are arranged in the same group. For example, group 17 is known as the halogen group. Among this group, the elements bear one electron short to fulfill their octet.

The whole periodic table comprises of 18 groups and 7 periods.

Therefore, the elements on the periodic table are arranged on the basis of highlighting similarities between elements. Thus, the correct option for this question is A.

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Answer:

Molecule is the general term used to describe any atoms that are connected by chemical bonds. There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.

Explanation:

The concentration of the HF solution is  0.03.

We know that the concentration has to do with the amount of the substance that is present in the system. We know that what we have is an acid hence we can only talk about the concentration of the acid if we can obtain the amount of the hydrogen ion.

We know that the acid is defined as any substance in which there is the presence of the hydrogen ion is what we call and acid. Since the hydrogen fluoride does have the hydrogen, we can say that the substance that we are dealing with here is an acid.

Thus;

pH = 14 - pOH

pOH = hydroxide ion concentration

pH = hydrogen ion concentration

pH = 14 - 12.5

= 1.5

[HF]  = Antilog (-1.5)

= 0.03

The acid would have a concentration of  0.03.

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Answer:

B. reflection

Explanation:

Rigid transformations are methods involved in changing the dimensions or orientation of a given figure. The methods are; dilation, rotation, translation and reflection.

Reflection is the process in which a given figure is turned or flipped with respect to a point or line of reference.

In the given question,

ΔDEF ≅ ΔD'EF' (Side-Side-Side congruence property)

This implies that ΔDEF was reflected about point E to produce ΔD'EF'. Thus the required rigid transformation is reflection.

Answer:

Is C - Rotation

Explanation:

I have right on my test

Hope you could get an idea from here.

Doubt clarification - use comment section.

Sure, here are six common uses of natural gas in the everyday lives of people in the U.S: Heating homes and buildings,
Cooking, Electricity generation, Transportation, Industrial processes and Commercial uses.

1. Heating homes and buildings: Natural gas is used as a primary heating fuel in many homes and buildings across the U.S., providing warmth and comfort during colder months.

2. Cooking: Natural gas is used as a fuel for stoves and ovens in many households, allowing people to cook food efficiently and quickly.

3. Electricity generation: Natural gas is a popular fuel for power plants, producing electricity that powers homes, businesses, and other facilities.

4. Transportation: Natural gas is increasingly used as a transportation fuel, powering vehicles such as buses and trucks.

5. Industrial processes: Natural gas is used as a fuel in a variety of industrial processes, such as refining and manufacturing.

6. Commercial uses: Natural gas is used in a variety of commercial applications, such as for heating and cooling buildings, powering equipment, and fueling vehicles used for business purposes.

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Answer:

A

Explanation:

The molecules in both metal and surrounding air will start moving slower because of the sudden decrease in environment tmeperature. The thermal energy around the metal plate decreases, also decreasing the kinetic energy.

Answer:

c(H+)=1.5M that is your answer

Answer: The molarity of the acid is 1.5 M.

Explanation:

We can use the equation:

\(M_1 V_1 = M_2V_2\)

where M represents the molarity of the solution, and V represents the volume.

Then, plugging in our information, we have:

\((X)(100 \text{mL}) = (6.0 \text{ M})(25 \text{ mL})\)

Solving for X, by dividing by 100, gives us:

\(X = \frac{(6.0 \text{ M})(25 \text{ mL})}{100 \text{ mL}} = 1.5 \text{ M}\)

So, the molarity of the unknown acid is 1.5 M.

Considering the Charles' law, the gas would have a temperature of -109.2 C.

Finally, Charles' law establishes the relationship between the volume and temperature of a gas sample at constant pressure. This law says that the volume is directly proportional to the temperature of the gas. That is, if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.

Charles' law is expressed mathematically as:

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

If you want to study two different states, an initial state 1 and a final state 2, the following is true:

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

In this case, you know:

You can see that the pressure remains constant, so you can apply Charles's law.

Replacing in the Charles's law:

\(\frac{10 L}{293 K} =\frac{6 L}{T2}\)

Solving:

\(\frac{10 L}{293 K} T2=6 L\)

\(T2=\frac{6 L}{\frac{10 L}{293 K} }\)

T2=163.8 K= -109.2 C

The gas would have a temperature of -109.2 C.

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That 1500 kJ of energy were transferred to water at 20.0°C. Heat capacity (c) for liquid water is 4.18 J/g C​. mass of water could be brought to the boiling point is 4485 g.

given that :

heat energy = 1500 kJ

heat capacity , c = 4.18 J/g °C

initial temperature = 20.0°C

boiling of water ,final temperature = 100 °C

Q = mcΔT

m = Q / (cΔT)

m = 1500 / ( 4.18 × ( 100 °C - 20 °C )

m = 1500 / 334.4

m = 4.485 kg = 4485 g

Thus, That 1500 kJ of energy were transferred to water at 20.0°C. Heat capacity (c) for liquid water is 4.18 J/g C. ​mass of water could be brought to the boiling point is 4485 g.

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Answer:

MASS

Explanation:

Formula for heat energy will be;

Q = mcΔt

Where;

m is mass

c is specific heat capacity

ΔT is change in temperature

Now, since both substances are copper, it means they will have the same specific heat capacities.

Thus, from the formula given earlier, it is seen that the mass is inversely proportional to the temperature change.

This means that the smaller the mass, the greater the temperature change.

Thus, the 3 g sample of copper will experience a greater temperature die to its smaller mass

Answer:

I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.

4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:

Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)

Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).

5. The balanced equation for the neutralization reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

(aq) represents an aqueous solution, and (l) represents a liquid.

6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:

Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)

Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.

6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:

pH = -log10[H+]

Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.

To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.

6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.

6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.

7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.

Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.

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Answer:

Option C. 52.057

Explanation:

The following data were obtained from the question:

Isotope >> Mass number > Percentage

A (Cr-50) > 50 >>>>>>>>>> 4.3

B (Cr-52) > 52 >>>>>>>>>> 83.8

C (Cr-53) > 53 >>>>>>>>>> 9.5

D (Cr-54) > 54 >>>>>>>>>> 2.4

Average atomic mass =?

The average atomic mass of chromium, Cr can be obtained as follow:

Average atomic mass = [(Mass of A × A%) /100] + [(Mass of B × B%) /100] + [(Mass of C × C%) /100] + [(Mass of D × D%) /100]

Atomic mass of Cr = [50×4.3)/100] + [52×83.8)/100] + [53×9.5)/100] + [54×2.4)/100]

= 2.15 + 43.576 + 5.035 + 1.296

Atomic mass of Cr = 52.057

Therefore, the atomic mass of chromium, Cr is 52.057

Answer:

When ions are made of a single atom, such as Li+1, they are called monatomic ions

Explanation:

Any atom or molecule with a net charge, either positive or negative, is known as an ion. An ion consisting of a single atom is a monoatomic ion; an ion consisting of two or more atoms is referred to as a polyatomic ion.

Answer:

A. mass

Explanation:

On edgenuity 2020

The property of matter that is conserved in chemical reactions is mass. The correct option is A.

The law of conservation of mass implies that mass is never be created nor destroyed in a chemical reaction.

The law of conservation of mass, also known as the principle of mass conservation, implies that for any system closed to all transfers of matter and energy.

The mass of the system must remain constant over time, because the system's mass cannot change, and thus quantity cannot be added or removed.

The law of conservation of mass was critical to the advancement of chemistry.

It assisted scientists in understanding that substances did not disappear as a result of a reaction, as they may appear to do, but rather transformed into another substance of equal mass.

Thus, the correct option is A.

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The N-terminal amino acid in the pentapeptide gly-ala-iso-leu-met is glycine (gly) (option B)

Glycine, characterized by the chemical formula NH2‐CH2‐COOH, represents the most rudimentary amino acid known to science. Impressively, it assumes the distinguished status of being the most prevalent amino acid ubiquitously present within the intricate tapestry of the human body, comprising a remarkable 30% of the entire amino acid repertoire.

Functioning as a non-essential amino acid, glycine exemplifies the remarkable adaptability of our biological machinery, wherein the body possesses the capacity to synthesize it using alternative amino acids.

Nevertheless, it remains imperative to ensure a sufficient supply of glycine through dietary sources, given its multifarious and indispensable contributions to a myriad of essential physiological processes.

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To calculate the standard Gibbs free energy change (ΔG°) for the reaction: Zn(s) + 2H⁺(aq) → Zn²⁺(aq) + H₂(g)We can use the equation:ΔG° = -nFΔE°, where:ΔG° is the standard Gibbs free energy change, n is the number of electrons transferred in the balanced equation, F is the and Faraday constant (approximately 96485 C/mol),

ΔE° is the standard cell potential (also known as E°cell) for the reaction. A number of electrons are transferred in the balanced equation. From the equation, we can see that 2 electrons are transferred. Next, we calculate ΔE°cell by summing the standard reduction potentials (E°) of the half-reactions involved:

ΔE°cell = E°cathode - E°anode

ΔE°cell = (0.00V) - (-0.76V) = 0.76V

Now, we substitute the values into the equation to calculate ΔG°:

ΔG° = -nFΔE°

    = -(2 mol) × (96485 C/mol) × (0.76 V)

    ≈ -147,207 J

Expressing the answer in three significant figures, the value of ΔG° for the reaction is approximately -147,207 J (or -147 kJ).

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Chemical substances that carry messages directly from one neuron to the next are called "Neurotransmitters." These chemical substances are important to our body.

Neurotransmitters are one of the body’s chemical substances. Neurotransmitters directly transmit messages from one nerve cell to the following neuron, muscle, or gland cell across a distance. The axon terminal, a component of the neuron, is where neurotransmitters are located. They are kept inside synaptic vesicles, which have thin walls. Numerous thousands of neurotransmitter molecules can fit inside each vesicle.

As a message or signal moves along a nerve cell, the electrical charge of the signal provokes neurotransmitter vesicles to fuse with the nerve cell membrane at the cell's very edge. The axon terminal is then distributed into a liquid area between one nerve cell and the next target cell.

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The electron configuration of zinc is:

1s2 2s2 2p6 3s2 3p6 3d10 4s2.

There are three unpaired electrons in Phosporus 3.

Hydrogen cannot form double bonds

The electron configuration of zinc is:

1s2 2s2 2p6 3s2 3p6 3d10 4s2.

There are three unpaired electrons in Phosporus 3.

Hydrogen cannot form double bonds

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