Sulfur dioxide is emitted into the atmosphere through I. volcanic eruptions. II. transpiration. III. the combustion of coal.

Answer:

True.

Explanation:

Water can act as a base or an acid. This means it is amphiprotic.

The general period and group trends among the main-group elements with respect to each of the following properties are as follows:

Periodic trends are the trends followed by the properties of the elements going down a group or across a period in the periodic table.

The properties of elements that show periodic trends include:

a. atomic radii - the size of an atom of an element

b. first ionization energy - the energy required to remove a valence electron

c. electron affinity - the energy required to add an electron to a neutral atom

d. ionic radii - the size of the ion of an element

e. electronegativity - the ability to attract electrons

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No, Olympic cyclists do not fill their tires with helium to make them lighter.

The claim that Olympic cyclists fill their tires with helium to make them lighter is not accurate. While helium is indeed a lighter gas compared to air, it is not a practical or effective choice for filling bicycle tires. The main reason for this is that helium is an inefficient gas when it comes to maintaining tire pressure.

When a tire is inflated, the pressure inside is determined by factors such as the volume of the tire, the amount of gas, and the temperature. In the given scenario, the tire has a volume of 855 ml and is filled to a pressure of 125 psi (pounds per square inch) at a temperature of 23 degrees Celsius. Assuming an average molar mass for air of 28.8 g/mol, the main answer can be explained as follows:

Helium, with a molar mass of 4 g/mol, is lighter than air. However, the pressure inside the tire is determined by the number of gas molecules present, rather than their individual masses. Since the molar mass of air is higher than helium, fewer air molecules are needed to achieve the same pressure as a larger number of helium molecules. In other words, if the tire is filled with helium, it would require more helium molecules compared to air to achieve the same pressure of 125 psi. This would result in a larger volume of gas inside the tire, potentially leading to an overinflated and less stable tire.

Additionally, helium is known to have higher rates of leakage compared to air, which means the tire would lose pressure more quickly over time. This would require frequent re-inflation, making it impractical for competitive cyclists who need to maintain optimal tire pressure throughout a race.

In conclusion, while helium is a lighter gas than air, Olympic cyclists do not fill their tires with helium because it is not an efficient or practical choice for maintaining tire pressure.

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In this case, the primary structure forms hydrogen bonds to fold itself.

The answer is primary structure.

Answer:

look below

Explanation:

1) 1 g (1000 ÷ 1E3)

2) 1000 mL (1 × 1E3)

3) 1600 mm (160 × 1E1)

4) 14000 m (14 × 1E3)

5) 0.109 kg (109 ÷ 1E3)

6) 0.250 km (250 ÷ 1E3)

1E3 is the same as 1000

1E1 is the same as 10

Please let me know if I need to further eloborate

1. The longer distance for each choice is:

2. The complete statements are as follows;

3. The basic unit of length in the metric system is the meter and is represented by a lowercase m.

4. The meter is defined as the distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second.

5. The values that complete each statement is given below:

6. The larger value for each option is:

7. The number of millimeters in 1 centimeter is 10 mm

8. Using the ruler and line, the answers are:

The unit for measuring distance in the metric system is the meter. Smaller and larger values of the meter are also used such as millimeters, centimeters, kilometers, etc.

Other units for measuring distance include yards, miles, and inches.

The various units for measuring distance can also be interconverted using their conversion factors.

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Answer

crush the cubes of broth, add warm water and stir the container.

Explanation

The FASTEST way to make the chicken broth with the cubes you have will be to increase the surface area of the cubes broth by crushing and raise the temperature of the cubes broth by adding warm water and by stirring the container.

Hence, the correct answer to your question is:

crush the cubes of broth, add warm water and stir the container.

Answer:

chemical energy is the energy of a chemical substance that is stored in the bonds of chemical compounds and is released when they undergo a chemical reaction and transform into another substance

Answer: 1.45M

Explanation:

The definition of molarity is moles/liter.  The neutralization of NaOH with HI is:

HI + NaOH = NaI  + H2O

One mole of HI reacts with 1 mole of NaOH.  We'll assume this is a titration reaction and that the 10.00ml sample of NaOH contains the same number of moles as the 56.75ml of 0.256M HI.

Moles HI:  (0.256 moles/liter)*(0.05675 L) = 0.01453 moles HI

That means we muct have 0.01453 moles NaOH in 10.0ml of NaOH solution.

(0.01453 moles NaOH)/(0.010L) = 1.45 M

==

Another approach is to use the relationship M1V1 = M2V2, which is useful for titrations (M is concentration and V is volume):

We want M2, so rearrange:  M2 = M1V1/V2

M2 = (0.256M)*(56.75ml)/(10.0ml)

M2 = 1.45M

Answer:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Explanation:

Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.

Answer:

D, A, C, E, B

Interphase, Prophase, Metaphase, Anaphase, Telpohase

The stereospecificity of the halogenation reaction is relevant when the alkane has at least one chirality center, and the number of chirality centers determines the number of possible stereoisomers that can be formed.

In the halogenation of an alkane, the stereochemistry of the product depends on the stereochemistry of the reactant. Specifically, the stereospecificity of the reaction is relevant when the reactant has at least one chirality center.

A chirality center is a carbon atom bonded to four different substituents. When a halogen, such as chlorine or bromine, adds to an alkane at a chirality center, two possible products can be formed: one in which the halogen is on the same side as one of the substituents (cis) and another in which the halogen is on the opposite side (trans).

If the alkane has more than one chirality center, the halogenation reaction can result in multiple stereoisomers, depending on the relative configurations of the chirality centers. Therefore, the number of chirality centers in the reactant molecule determines the stereospecificity of the halogenation reaction.

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The volume of the gas is high and molar volume is also high.

A eudiometer is used to measure the change in the volume of the gas produced in the physical and chemical change. Air in the eudiometer is recorded during the experiment. leaked in to the water bath is also recorded during the experiment.so the measured volume is high. As the volume of the hydrogen gas is high. The volume is directly proportional to the number of moles of the gas ,the molar volume of the gas is also high. This is according to the Avogadro's law. Due to the presence of leaked air there are high volume of gas as well as high molar volume .

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Answer:

1 NaCl

Explanation:

Answer:

If i understand your question right, then your atomic number & number of protons  is below the name so 6. Your atomic mass is at the bottom. Your number of electrons will be the sum of whatever your protons and neutrons are

the atmospheric pressure in the lab is measured as 765 torr, the number of moles of h2 produced in the reaction is 0.922066 moles.

given ,

pressure = 765 torr

temperature = 298 k

volume = 22.4 L/Mol

by ideal law ,

pv = nRT

n = pv/Rt

  = 0.922066 moles

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Answer:

What kind of properties result in the substance changing into a new substance?

A) Liquid Properties

B) Physical Properties

C) Chemical Properties

D) Real Properties

Edit: I don't like that question, so here another one instead...

Which of the following statement is incorrect for a chemical reaction?

A) Heat may be given out but never absorbed.

B) Sound may be produced.

C) A color change may take place.

D) A gas may be evolved

Explanation:

Answer:

Which of the following matches the correct definition to an example?

A. Chemical Change: My foot changes color

B. Physical Change: My microwave exploded

C. Chemical Change: My dog ate my homework

D. Physical Change: My homework burned in a fire

Also can u pls mark me brainliest im new pls

A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is anticodon.

What are base sequence?

The arrangement of the nucleotides that make up a DNA molecule is called base sequence.

Codons can be found in DNA or mRNA. These are three-nucleotide sequences that designate a particular amino acid. The tRNA (transfer RNA) molecules include anticodons, which aid in bringing or transferring amino acids to the mRNA during translation. A three-nucleotide sequence is also present in an anticodon. The nucleotides are complementary to the sequence of nucleotides on the mRNA that is being translated, allowing the anticodon in the tRNA to engage with the particular codon in the mRNA and bring the particular amino acid that the mRNA is coding for during translation.

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Controlling hazardous substances like coolant that can drip off engine components when diagnosing and repairing cooling systems requires taking appropriate safety measures to minimize the risk of exposure. Here are some steps you can take to control the spread of hazardous substances:

Isolate the work area: Set up a barrier around the work area to keep coolant from spreading to other parts of the garage or workspace.

Use protective equipment: Wear gloves, eye protection, and other appropriate protective gear to minimize your exposure to coolant.

Collect and contain spills: Use absorbent materials like kitty litter, sand, or oil-only sorbents to collect and contain any coolant that drips off the engine components. Dispose of the absorbed material in a safe and appropriate manner.

Use drip pans: Place drip pans or catch trays under the engine components to catch any coolant that may drip off.

Clean up thoroughly: Clean up any remaining coolant or absorbent material thoroughly, taking care to avoid spreading the material to other parts of the workspace.

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the net-ionic redox reaction between permanganate ion and bisulfite ion in test tube #5 is MnO4− + 5HSO3− + 8H+ → MnSO4 + 5SO42− + 4H2O.

Manganese has multiple oxidation states. The most important ones are +2, +4, +6, and +7. In order to determine the net-ionic redox reaction between permanganate ion and bisulfite ion in test tube #5, we first write a balanced equation for the reaction that will occur between these two ions. To balance the equation, we will first write the oxidation states of manganese for both the permanganate and bisulfite ions. Oxidation States of Manganese: Manganese has an oxidation state of +7 in permanganate ion and +4 in MnSO4 (produced by the reaction).

Half Reactions: Next, we need to separate the reaction into two half-reactions: one for oxidation and one for reduction. The half-reaction for oxidation is:

MnO4− → MnSO4 + H2O + e−

The half-reaction for reduction is:

H+ + HSO3− + e− → SO42− + H2O

Combining the two half-reactions, we get:

MnO4− + 8H+ + 5HSO3− → MnSO4 + 5SO42− + 4H2O

Thus, the net-ionic redox reaction between permanganate ion and bisulfite ion in test tube #5 is

MnO4− + 5HSO3− + 8H+ → MnSO4 + 5SO42− + 4H2O.

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Explanation:

There are several pieces of evidence that can be used to identify chemical changes, other than a change in color. Some of these include the production of a gas, the formation of a precipitate, a change in temperature, and a change in the state of matter (e.g. from a solid to a liquid or vice versa). For example, if a solid substance is added to a liquid and bubbles of gas are produced, this is evidence of a chemical change. Similarly, if two clear solutions are mixed together and a solid precipitate forms, this is also evidence of a chemical change. Additionally, if a substance is heated and it changes from a solid to a liquid or from a liquid to a gas, this is also evidence of a chemical change.

Answer:

A. Parts Per Billion

Explanation:

ED 2021

Answer:

a

Explanation:

Answer:

Intermolecular bonds become weaker

Melting

Temperature increases

Molecules vibrate faster

Explanation:

In the solid phase, intermolecular forces are found to be strongest. However, as the temperature is increased, the molecules of the solid begin to vibrate faster and intermolecular forces between them begin to weaken.

As intermolecular forces of a substance become weaker, the substance melts. The molecules in the liquid state possesses greater kinetic energy than the molecules in the solid state.

Hence the the answer above.

Answer:

B, C, F, and H

Explanation:

These are all things that happen in the increase of the kinetic energy of particles in a solid.

B. Intermolecular bonds become weaker

C. Melting

F. Temperature increases

H. Molecules vibrate faster

Also, just took the test and got it right.

Answer:

To solve this problem, we'll need to use stoichiometry and the molar ratios from the balanced chemical equation. Here's how you can calculate the values:

(a) Mass of the lead nitrate sample:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 1 mole of oxygen gas (O2). We know that the volume of oxygen gas collected is 112 cm³, which is equal to 112/1000 = 0.112 dm³ (converting cm³ to dm³).

According to the molar volume of gas at STP (22.4 dm³), 1 mole of any gas occupies 22.4 dm³ at STP. Therefore, the number of moles of oxygen gas can be calculated as:

moles of O2 = volume of O2 / molar volume at STP

moles of O2 = 0.112 dm³ / 22.4 dm³/mol = 0.005 mol

Since 2 moles of lead nitrate produce 1 mole of oxygen gas, we can determine the number of moles of lead nitrate as:

moles of Pb(NO3)2 = 2 * moles of O2

moles of Pb(NO3)2 = 2 * 0.005 mol = 0.01 mol

To calculate the mass of the lead nitrate sample, we'll use its molar mass:

mass of Pb(NO3)2 = moles of Pb(NO3)2 * molar mass of Pb(NO3)2

mass of Pb(NO3)2 = 0.01 mol * (207 g/mol + 2 * 14 g/mol + 6 * 16 g/mol)

mass of Pb(NO3)2 = 0.01 mol * 331 g/mol

mass of Pb(NO3)2 = 3.31 g

Therefore, the mass of the lead nitrate sample is 3.31 grams.

(b) Mass of lead(II) oxide produced:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 2 moles of lead(II) oxide (PbO). So, the number of moles of PbO produced is equal to the number of moles of Pb(NO3)2.

mass of PbO = moles of PbO * molar mass of PbO

mass of PbO = 0.01 mol * (207 g/mol + 16 g/mol)

mass of PbO = 0.01 mol * 223 g/mol

mass of PbO = 2.23 g

Therefore, the mass of lead(II) oxide produced is 2.23 grams.

(c) Volume of nitrogen dioxide gas produced at STP:

From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 4 moles of nitrogen dioxide gas (NO2). So, the number of moles of NO2 produced is twice the number of moles of Pb(NO3)2.

moles of NO2 = 2 * moles of Pb(NO3)2

moles of NO2 = 2 * 0.01 mol = 0.02 mol

Using the molar volume of gas at STP, we can calculate the volume of nitrogen dioxide gas:

volume of NO2 = moles of NO2 * molar volume at STP

volume of NO2 = 0.02 mol * 22.4 dm³/mol = 0.448 dm³

Therefore, the volume of nitrogen dioxide gas

Answer:

second one/ B

Explanation:

just took the quiz

Answer:b

Explanation:

Answer:

78.04g of 0.448 moles must be added

Explanation:

Using H-H equation we can find the pH of the buffer:

pH = pKa + log [A⁻] / [HA]

Where pH is the pH of the buffer = 7.2

pKa = 7.1

[A⁻] = [K₂HPO₄]

[HA] = [KH₂PO₄]

Replacing:

7.2 = 7.1 + log [K₂HPO₄] / [KH₂PO₄]

0.1 = log [K₂HPO₄] / [KH₂PO₄]

1.2589 = [K₂HPO₄] / [KH₂PO₄] (1)

And as the  concentration of the buffer is:

1M = [K₂HPO₄] + [KH₂PO₄] (2)

Replacing (2) in (1):

1.2589 = 1M - [KH₂PO₄] / [KH₂PO₄]

1.2589 [KH₂PO₄] = 1M - [KH₂PO₄]

2.2589 [KH₂PO₄] = 1M

[KH₂PO₄] = 0.44M

And [K₂HPO₄] = 0.56M

In 800mL = 0.8L:

0.8L * (0.56mol / L) = 0.448 moles K₂HPO₄. The mass is -Molar mass K₂HPO₄: 174.2g/mol-:

0.448 moles * (174.2g / mol) =

44g is the mass of carbon dioxide gas generated in each of the runs. It is the most fundamental characteristic of matter as well as one of the fundamental quantities throughout physics.

Anything that has the same quantity, or the 6.022 x 10²³ atoms found in 12 grammes of carbon-12 (C-12), is referred to as a mole. The formula for calculating an element's number of moles is = Given mass/Atomic mass. Carbon dioxide's molar mass is 44g. It is the most fundamental characteristic of matter as well as one of the fundamental quantities throughout physics.

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The answers to the given problem are monthly energy use of household in m3 of natural gas equivalent = 787.5 m³, Monthly energy use of household in kg of oil equivalent = 0.29484627 ktoe, CO2 footprint of household in kg = 1500 kgCO2 (1.5 metric tonnes of CO2).

1) Calculation of monthly energy use in m3 of natural gas equivalent:For every 1 kWh of electricity produced, the gas turbines consume 0.21 m³ of natural gas equivalent.

The consumption of natural gas equivalent can be calculated by multiplying the monthly average electric energy consumption by the quantity of natural gas equivalent that is consumed by gas turbines for every 1 kWh of electricity produced.

So, the monthly consumption of natural gas equivalent will be,

3750 kWh * 0.21 m³/kWh = 787.5 m³ of natural gas equivalent

Calculation of monthly energy use in kg of oil equivalent:

Assuming that natural gas has a calorific value of 55.5 MJ/m³, and that the conversion efficiency of natural gas turbine is 33%, the equivalent energy that will be produced from 1 m³ of natural gas is 55.5 x 0.33 = 18.315 MJ/m³.

In order to calculate the equivalent energy that will be produced from 787.5 m³ of natural gas, we can use the formula:

Equivalent energy = calorific value of natural gas x volume of natural gas x conversion efficiency

So, the equivalent energy that will be produced from 787.5 m³ of natural gas is,

Equivalent energy = 55.5 x 787.5 x 0.33

= 12337.3125 MJ

= 12.337 GJ

So, the monthly consumption of oil equivalent will be:

12.337 GJ / 41.868 = 0.29484627 ktoe (kilo tonnes of oil equivalent)

2) Calculation of CO2 footprint in kg:

Assuming the average CO2 emissions coefficient for gas fired power plants is 400 g/kWh.

The CO2 footprint in kg can be calculated by multiplying the monthly average electric energy consumption by the CO2 emissions coefficient of gas-fired power plants.

So, the CO2 footprint in kg will be:

3750 kWh x 0.4 kg/kWh = 1500 kgCO2 (i.e., 1.5 metric tonnes of CO2).

Therefore, the answers to the given problem are:

Monthly energy use of household in m3 of natural gas equivalent = 787.5 m³

Monthly energy use of household in kg of oil equivalent = 0.29484627 ktoe

CO2 footprint of household in kg = 1500 kgCO2 (1.5 metric tonnes of CO2).

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