A 65 W electric blanket runs at 18 V .
What is the resistance of the wire in the blanket? Express your answer to two significant figures and include the appropriate units.
How much current does the wire carry? Express your answer to two significant figures and include the appropriate units.

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Answer:

pen??????l think l m not sure

Answer:

Soluble fiber attracts water and turns to gel during digestion. This slows digestion. Soluble fiber is found in oat bran, barley, nuts, seeds, beans, lentils, peas, and some fruits and vegetables. It is also found in psyllium, a common fiber supplement.:

Answer:

the mass of the new copper roof will increase over time as it turns green

Explanation:

this is because copper will react with atmospheric substances to form copper compound. this does not violate the law of conversation of mass because the mass increases as copper react with atmospheric substances in the presence of atmospheric air, oxidizes to copper compounds which are heavier in mass than copper atoms

According to the law of conservation of mass, the mass of the copper roof increases as oxygen is added to it to form copper oxide.

Oxidation is a reaction in which oxygen is added to an element.

Oxidation metals in the presence of air occurs frequently as metals are reactive.

Copper roof turns green with time as the metals react with oxygen in air to form copper oxide.

The mass of the new copper roof increases in accordance with the law of conservation of mass as oxygen is added to metallic copper to increase it's mass.

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Thermohaline circulation is very important because it supplies heat to the polar regions. If this circulation stopped, the average temperature of polar regions would cool down to 5-10 degrees Celsius. It could be fatal to underwater creatures and might trigger hurricanes in those regions.

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There would be 5 half-lives

The half-life of an isotope is the amount of time it takes for half of the atoms of a radioactive isotope to decay into another isotope or element. It is a characteristic property of a specific isotope and does not depend on the amount of the material present.

The half-life of a radioactive isotope is a constant that can be used to measure the age of minerals and rocks, as well as to track the progress of nuclear reactions and to diagnose and treat certain medical conditions.

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the element is nitrogen

5+2=7

81.3 g H₃PO₃

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Unbalanced] PCl₃ + H₂O → HCl + H₃PO₃

↓

[RxN - Balanced] PCl₃ + 3H₂O → 3HCl + H₃PO₃

[Given] 53.6 g H₂O

[Solve] x g H₃PO₃

Step 2: Identify Conversions

[RxN] 3 mol H₂O → 1 mol H₃PO₃

[PT] Molar Mass of H - 1.01 g/mol

[PT] Molar Mass of O - 16.00 g/mol

[PT] Molar Mass of P - 30.97 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

Molar Mass of H₃PO₃ - 3(1.01) + 30.97 + 3(16.00) = 82.00 g/mol

Step 3: Stoich

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

81.3023 g H₃PO₃ ≈ 81.3 g H₃PO₃

For the first set, we can rank the bonds according to strength based on their bond dissociation energies (BDEs).Thus, the ranking from strongest to weakest is I-I, Br-Br, Cl-Cl.
For the second set, we can use a similar approach.Chlorine is in between. Thus, the ranking from strongest to weakest is Si-F, Si-Cl, Si-I.

A) In the first set, we have the halogens Cl-Cl, I-I, and Br-Br. The bond strength depends on the size of the atoms and the overlapping of their electron clouds. As we move down the periodic table, atomic size increases, resulting in weaker bond strength due to less overlap between electron clouds. So, the ranking of bond strength for set A would be as follows:

1. Cl-Cl (strongest)
2. Br-Br
3. I-I (weakest)

B) In the second set, we have Si-F, Si-I, and Si-Cl. In this case, bond strength is determined by the difference in electronegativity between silicon and the other atoms. The greater the electronegativity difference, the stronger the bond. The electronegativity values for silicon, fluorine, iodine, and chlorine are approximately 1.8, 3.98, 2.66, and 3.16, respectively. Based on these values, the ranking of bond strength for set B would be:

1. Si-F (strongest)
2. Si-Cl
3. Si-I (weakest)

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The conservation of energy in chemical reactions is applicable when the temperature remains constant, and the number of moles of gaseous reactants is equal to the number of moles of gaseous products.

In chemical reactions, energy can be exchanged between the system and its surroundings. The conservation of energy, known as the first law of thermodynamics, states that the total energy of a closed system remains constant. However, for this conservation to hold true in chemical reactions, certain conditions must be met.

Firstly, the temperature of the system should remain constant throughout the reaction. This means that no heat is gained or lost to the surroundings, and the thermal energy within the system remains unchanged. When temperature is constant, the internal energy of the system, which includes both the potential and kinetic energy of the particles, does not change.

Secondly, the number of moles of gaseous reactants must be equal to the number of moles of gaseous products. This condition is based on Avogadro's principle, which states that equal volumes of gases, under the same conditions of temperature and pressure, contain the same number of particles (moles). If the number of moles of gaseous reactants differs from the number of moles of gaseous products, there will be a change in the number of particles and, consequently, in the system's internal energy.

By fulfilling these conditions, the conservation of energy can be applied to chemical reactions. It allows us to analyze and calculate the energy changes involved in the reaction without considering any temperature-dependent or stoichiometric factors that may affect the system's energy balance.

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The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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Answer:

The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.

Explanation:

Plato answer

The conversion of substance A to substance B will happen extremely slowly.

A molecule is two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance.

The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.

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Therefore, the order of the reaction with respect to NO is 1, the order of the reaction with respect to \(O_3\)  is 1, and the total order of the reaction is 2.

\(NO + O_3 - > NO_2 + O_2\)  ,rate=k[NO][\(O_3\)]

The rate of the reaction is given as  rate=k[NO][\(O_3\)] , where k is the rate constant and [NO] and [\(O_3\)]  represent the concentrations of NO and \(O_3\), respectively.

The order of the reaction with respect to each element is determined by the power to which the concentration of that element appears in the rate expression. In this case, the concentration of NO appears to the first power and the concentration of  appears to the first power, so the order of the reaction with respect to NO is 1 and the order of the reaction with respect to \(O_3\) is 1.

The total order of the reaction is the sum of the orders of the reaction with respect to each element. In this case, the total order of the reaction is 1 + 1 = 2.

Therefore, the order of the reaction with respect to NO is 1, the order of the reaction with respect to \(O_3\)  is 1, and the total order of the reaction is 2.

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Complete question:

Consider the following reaction:

\(NO + O_3 - > NO_2 + O_2\)  ,rate=k[NO][\(O_3\)]

what is order of reaction with respect to each element and total order of reaction?

The molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is 0.56 M.

Molarity refers to the concentration of a solution, usually measured in moles per liter (M). The number of moles of solute in a solvent can be determined using molarity. The following formula is used to calculate the molarity of a solution: Molarity = moles of solute ÷ liters of solution

Therefore, the molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is calculated as follows:

Convert the mass of silver nitrate to moles using its molar mass: AgNO3 molar mass = 107.87 g/mol

Number of moles of AgNO3 = mass / molar mass

= 55.7 g / 107.87 g/mol

= 0.515 M

Calculate the volume of the solution in liters: Volume of solution = 721 ml / 1000 ml/L

Volume of solution = 0.721 L

Using the molarity formula above, the molarity of the solution can be calculated:

Molarity = moles of solute ÷ liters of solution

Molarity = 0.515 mol ÷ 0.721 L

Molarity = 0.56 M

Therefore, the molarity of the solution resulting from dissolving 55.7 g of silver nitrate in enough water to give a final volume of 721 ml is 0.56 M.

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The two equivalents of benzaldehyde were used, and the desired product was dibenzalacetone  has the proton NMR signal is 5 signals.

The reaction of the  two equivalents of benzaldehyde with the acetone show the aldol condensation and form the product is dibenzalacetone.

the dibenzalacetone shows the following proton NMR signals:

proton a : 7.1 ppm , doublet = 1 proton

proton b : 7.8 ppm doublet = 1 proton

proton c : 7.5 ppm doublet = 2 protons

proton d : 7.4 ppm is the multiplet = 2 protons

proton e : 7.3 ppm multiplet

The chemical shifts are based on the protons chemical environment. the coupling constant is 12 Hz for the  olefinic hydrogens.

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Approximately 78% of liquid air in Earth's environment is nitrogen, while 21% is oxygen. In trace proportions, additional gases like carbon dioxide, neon, even hydrogen are also present in air.

The chemical element hydrogen is represented by the letter H the atomic number 1. The lightest element is hydrogen. Under normal circumstances, oxygen is a gas made up of diatomic molecules with the formula H 2. It is non-toxic, tasteless, colorless, odorless, and extremely flammable.

Numerous helium atoms can be found in water, plants, animals, and, of course, people here on earth. Although it is found in almost all living organisms' molecules, it is extremely rare as a gas and only makes up less than one component per thousand by volume.

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Answer:

c

Explanation:

the map shows water near the factories go into moth lake so all of the waist will end up there

In salt solutions, anions can act as proton receptors, which means they can accept a hydrogen ion (proton) from water molecules, leading to the formation of hydroponic ions (H3O+). This results in an increase in the concentration of hydroponic ions, making the solution acidic.

The answer is (b) acidic, receptors.

In salt solutions, anions can act as proton receptors, which makes the solution basic. When an anion accepts a proton (H+), it increases the concentration of hydroxide ions (OH-) in the solution, leading to a higher pH and a basic nature.

The correct answer is: e) basic, receptors.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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By performing the necessary calculations for each case, we can determine the pH values for (a), (b), (c), (d), and (e) in the titration of HClO with KOH.

(a) Before the addition of any KOH, the solution contains only HClO. To calculate the pH, we need to consider the ionization of HClO. HClO is a weak acid, and its ionization can be determined using its ionization constant. By using the ionization constant and the initial concentration of HClO, we can calculate the concentration of H+ ions and convert it to pH.

(b) After adding 25.0 mL of KOH, a neutralization reaction occurs between HClO and KOH. The moles of HClO and KOH are now equal, and the solution contains the resulting salt. We can determine the concentration of OH- ions based on the amount of KOH added and calculate the pOH. From pOH, we can obtain the pH by subtracting it from 14.

(c) After adding 35.0 mL of KOH, the solution is still in excess of HClO. We need to determine the remaining moles of HClO and the resulting concentration of H+ ions to calculate the pH.

(d) After adding 50.0 mL of KOH, the moles of HClO and KOH become equal. The solution contains only the salt resulting from the neutralization reaction. We can calculate the concentration of OH- ions and convert it to pOH and then pH.

(e) After adding 60.0 mL of KOH, the solution is in excess of KOH. We need to determine the excess moles of KOH and calculate the concentration of OH- ions to obtain the pOH and pH.

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The molar concentration of a sugar solution is 0.3m. This beaker is sitting on your desk in the open air. The solute potential at 27 c will be 7.48.

The solute potential at 27 c- will be 7.48.

Concentration of the sugar solution, C = 0.3 M

Temperature, T = 27° C = 273 + 27 = 300 K

The solute potential is given as:

solute potential = - iCRT

i is the number of particles the particular molecule will make in water

i = 1 for sugar

R is the universal gas constant = 0.0831 liter bar/mole-K

on substituting the respective values, we get

solute potential = - 1 × 0.3 × 0.0831 × 300

or

The solute potential = - 7.479 ≈ - 7.48

The solute potential is equal to the water potential when no physical pressure is applied to a solution. A solution's water potential, or the ability for the water to flow and perform work, will change if physical pressure is applied to it.

Solute potential is the degree to which the water potential decreases as a result of the dissolution of a solute. When a solute is dissolved in water, fewer free water molecules are present, which lowers the molecules' kinetic energy. As a result, the solute potential decreases.

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Atoms with very high electronegativity exhibit a strong electron-attracting ability, high ionization energy, small atomic radius, the ability to form strong covalent bonds, a polarizing effect on chemical bonds, and can participate in hydrogen bonding.

Strong electron-attracting ability: Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. Atoms with high electronegativity have a strong pull on electrons, meaning they attract and hold electrons tightly.

High ionization energy: Ionization energy is the energy required to remove an electron from an atom or ion. Atoms with high electronegativity tend to have high ionization energies because they tightly hold their valence electrons and require a significant amount of energy to remove them.

Small atomic radius: Electronegativity generally increases as the atomic radius decreases. Atoms with high electronegativity tend to have smaller atomic radii, as the positive charge in the nucleus pulls the electrons closer, resulting in a stronger electron-attracting ability.

Ability to form strong covalent bonds: Atoms with high electronegativity can form strong covalent bonds by sharing electrons with atoms of lower electronegativity. This results in the formation of stable molecules with shared electron pairs.

Polarizing effect on chemical bonds: When atoms with high electronegativity are involved in a bond with atoms of lower electronegativity, they exert a stronger pull on the shared electrons, resulting in a polar bond. This leads to the development of partial positive and partial negative charges within the molecule.

Participation in hydrogen bonding: Atoms with high electronegativity, such as oxygen and nitrogen, can participate in hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to an electronegative atom and interacts with another electronegative atom through a weak electrostatic attraction.

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The chemical equation for the base ionization of methylamine, CH₃NH₂, is: CH₃NH₂ + H₂O ⇌ CH₃NH₃⁺ + OH⁻. The Kbb expression for methylamine can be written as: Kbb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

In the above equation, [CH₃NH₃⁺] represents the concentration of methylammonium ions, [OH⁻] represents the concentration of hydroxide ions, and [CH₃NH₂] represents the concentration of methylamine. The equilibrium constant, Kbb, can be used to calculate the degree of ionization of the methylamine solution, as well as the concentration of hydroxide ions in the solution.

Methylamine is a weak base, and its ionization constant, Kb, is 4.4 x 10⁻¹⁰ at 25°C. The base ionization equation of methylamine can be derived from the Kb expression by using the equilibrium constant expression and solving for the products and reactants.

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Answer:

True

Explanation:

The greater the mass of the object, the greater its weight force will be.

Answer:

A, And D

Explanation:

I did this before and i got it right ❤

Final pressure be P₂ = 0.9777 atm.

given data:-

data provided

Volume at first = 23.0 L

1.15 atm initial pressure

The starting temperature is 213.0 K.

498.0 K is the final temperature.

Volume completed: 55.0 L

Final pressure =?

Briefly:-

The generic gas equation states:

P1V1/T1 = P2V2/T2

P1V1/T1 = P2V2/T2 is a formula.

Initial pressure is P1.

Initial volume: V1

Initial temperature is T1.

Final pressure is P2.

Final volume is V2.

T2 = Actual temperature.

P2 = P1V1 T2/ T1 V2 P2 = 1 atm 23.0 L 498.0 K / 213.0 K 55.0 L

P2 = 11454 atm .L. K / 11715 K.L

P₂ = 0.9777 atm.

The piston force, sometimes referred to as piston cylinder force, is the force applied to the piston while it is under cylinder pressure. An illustration of this force can be seen in a hydraulic system.

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Answer:

kcgiobb jkffiob hffyio hiiddhoo hhioiv

Answer: Have a blessed day

Explanation:

Water Cycle: Component # 1. Evaporation:

Evaporation is the process where a liquid changes from its liquid state to a gaseous state. Liquid water becomes water vapour. Temperature is the primary factor for evaporation.

During the water cycle the water of the oceans and freshwater bodies, such as lakes and rivers, is warmed by the sun and evaporates. During the process of evaporation, impurities in the water are left behind. As a result, the water that goes into the atmosphere is cleaner than it was on Earth.

Water Cycle: Component # 2. Condensation:

Condensation is the opposite of evaporation. Condensation is the process where a gas is changed into a liquid. Condensation occurs when the temperature of the vapour decreases.

The water droplets formed from condensation are very small and they remain suspended in the atmosphere. There millions of droplets of suspended water form clouds in the sky or fog at ground level. Water condenses into droplets only when there are small dusts particles present around.

Water Cycle: Component # 3. Precipitation:

When the temperature and atmospheric pressure are right, the small droplets of water in clouds form larger droplets or raindrops and it is called precipitation. The raindrops fall to earth.

As a result of evaporation, condensation and precipitation, water travels from the surface of the Earth goes into the atmosphere, and returns to Earth again.

Water Cycle: Component # 4. Surface Runoff:

Much of the water that returns to Earth as precipitation runs off the surface of the land and flows down-hill into streams, rivers, ponds and lakes. Small streams flow into the ocean. Surface runoff is an important part of the water cycle because, through surface runoff, much of the water returns again to the oceans, where a great deal of evaporation occurs.

Water Cycle: Component # 5. Infiltration:

ADVERTISEMENTS:

Infiltration is an important process where rain water soaks into the ground, through the soil and underlying rock layers. Some of this water ultimately returns to the surface at springs or in low spots downhill. Some of the water remains underground and is called groundwater.

As the water infiltrates through the soil and rock layers, many of the impurities in the water are filtered out. This filtering process helps in cleaning of the water.

Water Cycle: Component # 6. Transpiration or Evapotranspiration:

This is performed by plants. As plants absorb water from the soil, the water moves from the roots through the stems to the leaves. Once the water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapour in the air. This process of evaporation through plant leaves is called transpiration. In large forests, an enormous amount of water will transpire through leaves.

Answer:

Explanation:

Warm lake vapor pressure is higher than cold lake vapor pressure because it evaporates more quickly. In other words, as the temperature of warm water increases, the kinetic energy of the warm water molecule also increases. As the kinetic energy of the warm water molecule increases, the number of molecules conversion into a vapor also increases, thereby increasing the vapor pressure of warm water.

Answer:

B.

Warm water evaporates more quickly.

Explanation:

i got it right on edmentum!!