Which 2 statements best describe the effects of ocean currents on weather?

A. Warm currents cause the air above them to take up less moisture than cold currents do.

B. Cold currents are cold because they absorb thermal energy from the air above them.

C. Warm currents warm the air above them.

D. Cold currents remove thermal energy from the air above them.

This is due today please help me!

Answer:

sf2 is a molecule that has a net dipale moment.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 2.94g is the mass of ethanoic acid which can be actually collected from the oxidation of 2.3 g of ethanol .

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

C₂H₂O  + K\(_2\)Cr\(_2\)O\(_7\) \(\rightarrow\) C₂H₂O₂+water

mole of ethanol= 2.3 g/ 46.07

                         =0.049 moles

mole ratio between ethanol and ethanoic acid is 1:1

mass of ethanoic acid= 0.049×60.05g/mol

                                    =2.94g

Therefore, 2.94g is the mass of ethanoic acid which can be actually collected from the oxidation of 2.3 g of ethanol .

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Answer:

He

Explanation:

Helium is the only atom on the list with 2 protons and 2 neutrons

Answer:

Protons and Neutrons have approximately the same mass.

Equal numbers of protons and electrons make an atom neutral.

Protons have a positive charge

Explanation:

Protons and Neutrons have approximately the same mass. - both are 1 amu

Equal numbers of protons and electrons make an atom neutral. - protons are +1 and electrons are -1, so they cancel each other if there are equal amounts.

Protons have a positive charge - this is true.

Answer:

C

Explanation:

First of all, the law of conservation of matter states that " In an ordinary chemical reaction, the mass of the products is equal to the mass of the reactants."

So, the answer should be C since the mass of Al and O₂ is equal on both the reactant's and product's side.

4Al + 3O₂ → 2Al₂O₃

Reactants Side: 4 aluminum and 6(3*2) oxygen

Products Side: 4(2*2) aluminum and 6(2*3) oxygen

Answer:

4,186 joules

Explanation:specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree. For example, the specific heat of water is 1 calorie (or 4,186 joules) per gram per Celsius degree.

Taking into account the definition of Avogadro's Number, 3.704×10²³ atoms are in a sample of 0.615 mol Ne.

Avogadro's number indicates the amount of elementary entities (molecules, atoms, ions or other similar particles) that a mole of any substance contains. It applies to molecular and atomic substances.

Its value is 6.023×10²³ particles per mole.

You can apply the following rule of three: If 1 mole of Ne contains 6.023×10²³ atoms, 0.615 mole of Ne contains how many atoms?

amount of atoms= (0.615 moles ×6.023×10²³ atoms)÷ 1 mole

amount of atoms= 3.704×10²³ atoms

Finally, 3.704×10²³ atoms of Ne are present.

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The binding energy of a nucleus refers to the minimum energy required to separate the nucleus into its constituent nucleons. The binding energy per nucleon (BE/A) is a more useful quantity than the absolute binding energy (BE) since it takes into account the number of nucleons present.

The more tightly bound a nucleus is, the higher its binding energy per nucleon. The equation that determines the binding energy is given by the formula, E=Δmc² where E is the binding energy, Δm is the mass defect, and c is the speed of light. The mass defect is the difference between the actual mass of a nucleus and the sum of the masses of its individual protons and neutrons. The mass of antimony-121 is the sum of the masses of its constituent nucleons, given by: Mass of antimony-121 = (71 x 1.00783 u) + (50 x 1.00867 u) = 120.90380 u The actual mass of antimony-121 is 120.90380 u. Using the mass of each nucleon and the actual mass of antimony-121, the mass defect of the nucleus can be determined as follows: Mass defect (Δm) = [71(1.00783 u) + 50(1.00867 u)] - 120.90380 u= 0.1471 u The binding energy can then be calculated using the formula: E = Δmc²= (0.1471 u)(1.66054 x 10^-27 kg/u)(2.99792 x 10^8 m/s)^2= 2.539 x 10^-10 J/mol To convert this to kilojoules per mole, we can divide by 1000:2.539 x 10^-10 J/mol = 2.539 x 10^-13 kJ/mol Therefore, the binding energy of antimony-121 is 2.539 x 10^-13 kJ/mol.

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The physiochemical process for salt treatment to make it ready for human consumption is known as salt refining or salt purification.

This process involves several steps to remove impurities and enhance the quality of the salt. Here's a brief explanation of the process:

Extraction: Salt is typically obtained through two primary methods: mining rock salt deposits or evaporating seawater. In both cases, the salt is extracted in its crude form, which contains various impurities.

Washing: The extracted salt is first washed with water to remove dirt, debris, and other insoluble impurities. This step helps in removing larger particles and foreign matter from the salt.

Dissolving: The washed salt is then dissolved in water, forming a saltwater solution. This step aids in separating soluble impurities from the salt crystals.

Filtration: The saltwater solution is filtered to remove insoluble impurities such as sand, clay, and other solid particles. Filtration can be done using various methods like sedimentation, centrifugation, or using specialized filters.

Evaporation: The filtered saltwater solution is then heated to evaporate the water content. As the water evaporates, salt crystals start forming. This process is often carried out in large pans or evaporators under controlled conditions.

Crystallization: The concentrated salt solution is allowed to cool down, promoting the growth of salt crystals. The crystals are then separated from the remaining liquid through centrifugation or by using specialized equipment.

Drying: The separated salt crystals are dried to remove any remaining moisture. This can be done through natural evaporation or by using mechanical dryers.

Grinding and Packaging: Finally, the dried salt crystals are ground into a fine powder or kept as crystals, depending on the desired product. The salt is then packaged in suitable containers to ensure its cleanliness and preservation until it reaches the consumers.

Throughout the salt treatment process, quality control measures are implemented to ensure that the final product meets the required standards for human consumption. These measures include monitoring the purity, iodine content (if applicable), and adhering to hygiene practices to maintain the safety and integrity of the salt.

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Answer:

Synthesis

Explanation:

Two molecules of X are combining with 2 molecules of Y to form 2 single molecules of XY.  A synthesis reaction is when two or more substances (compounds or elements) combine to form just one compound, regardless of how many molecules of the same compound are formed .  Although we have 2 molecules of XY, they are the same compound.

Answer:

Calculate the number of moles of oxygen required to react exactly with 4.30 ... How many moles of NH3 can be made from 2.00 moles of Nz if you have excess Hz? ... 10. How many grams of water are made when 3.00 moles of butanol is combusted? ... If 50.0 g of calcium oxide were produced, how many grams of calcium ...

Answer:

41.44 g

Explanation:

First of all, we must put down the equation of the reaction;

\(CaO + H2O ----->Ca(OH)2\)

Number of moles of CaO = 33g/56 g/mol = 0.59 moles

Number of moles of H20 = 10g/18 g/mol = 0.56 moles

Since the reaction is in 1:1 mole ration, H2O is the limiting reactant

Hence;

mass of Ca(OH)2 produced = 0.56 moles * 74 g/mol = 41.44 g

It is a limitation of the kinetic-molecular theory because closeness and low speed don't allow  intermolecular forces to become important at certain pressure and temperature.

The kinetic gas theory explains micro-particles (atoms and molecules). The kinetic theory is basically  based upon the assumption of microscopic particles . We can use it as a microscopical model.

And the kinetic theory of gases explains how gases behave by assuming that they are made up of quickly moving atoms or molecules.

Basically kinetic model is based on the below assumptions.-

I t is assumed that the gas is made by a large number of identical molecules. And molecules are moving in random directions. And also separated by the large distances as compared to their size.

The molecules collide completely elastically  without no energy loss.

Always kinetic energy is transferred between molecules through heat.

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The result table indicate that A. The solute is a SOLID because it has a DECREASE in the amount dissolved as temperature decreases.

The solubility of a solid solute in a liquid solvent generally decreases as the temperature decreases. This is because the kinetic energy of the solute molecules decreases as the temperature decreases. As the kinetic energy of the solute molecules decreases, they are less likely to have enough energy to escape from the solution and enter the gas phase.

In the table, as the temperature decreases, the concentration of the solute in the solution decreases. This indicates that the solute is a solid and that the solubility of the solute decreases as the temperature decreases.

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The main plant structure that provides most of the water necessary for photosynthesis is the root system.

The root system of a plant is responsible for absorbing water from the soil. It consists of roots that extend deep into the ground, allowing the plant to access water from underground sources such as groundwater or moisture in the soil. Through a process called osmosis, water moves into the roots and is transported to the rest of the plant, including the leaves where photosynthesis takes place.

The water absorbed by the roots provides the necessary hydration for the photosynthetic process, allowing plants to produce glucose and oxygen using sunlight and carbon dioxide. Thus, the root system plays a vital role in providing most of the water required for photosynthesis in plants.

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Answer:

D

Explanation:

electrons have a negative charge. gaining electrons increases the negative charge.

Answer:

Abiotic and Biotic factors?

Answer:

D. Paper D, paper C, paper A, paper B

Explanation:

Please check the attached image for a diagram showing clearly the pH colour chart

pH measures how acidic or alkaline a solution is. The pH scale ranges from 1 - 14

Solutions with a pH less than 7 are acidic

Solutions with a pH equal to 7 are neutral

In the image, test papers D and C occur on the left, thus, they are acidic

Solutions with a pH greater than 7 are alkaline

pH test papers are used to test to test how acidic or alkaline a solution is

The molecular formula of the compound is \(NH_4\) ammonium.

The empirical formula is the simplest ratio of atoms of each element in a compound, expressed as a whole number. To determine the molecular formula, we need to multiply the number of atoms in the empirical formula by the molar mass of the compound.In this case, the empirical formula is \(NH_2\), meaning that there is one nitrogen and two hydrogen atoms. The chemical has a 32 g/mol molar mass.Therefore, if we multiply the number of atoms in the empirical formula by 32 g/mol, we will get the molecular formula, which is \(NH_4\), meaning that there are four nitrogen and eight hydrogen atoms.

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While balancing the chemical equations, the sub scripts aren't changed because by changing sub script we actually change the compound formed, hence coefficients are changed so the compound remains the same.

for example : ( for understanding )

in balancing the given reaction,

H2 + O2 =》H2O

if we change Oxygen's sub script in " H2O "

we get,

H2O + O2 =》H2O2

but here the compound formed isn't water, it is "H2O2" (hydrogen peroxide), so we can't change the sub script.

but by changing the coefficient, we get :

2 H2 + O2 =》2 H2O

Answer: Well most if not all metals rust due to oxidation. Most can be melted at certain temperatures or just heated to a certain degree to be maluable

Explanation:

Answer:

The periodic table is useful today for finding out all the elements that exists on Earth. The elements there can be used to write down chemical formulas, calculate things like molar mass/atomic mass of each element, atomic number for each, number of valence electrons each element has, the oxidation number for each, etc. Lastly, it can be used to predict the properties of elements yet to be discovered.

Explanation:

Hope it helped!

A substance that cannot be broken down into simpler substances using any chemical means is called an "element".

An element is a pure substance that is made up of only one type of atom, and each element has a unique set of physical and chemical properties. Examples of elements include hydrogen, oxygen, carbon, gold, and iron. There are currently 118 known elements, organized on the periodic table based on their atomic structure and properties. In chemistry, a substance is a type of matter that has a constant composition and distinct properties. It is a form of matter that is made up of only one type of molecule, atom, or ion. A substance can be either an element or a compound. Elements are pure substances that cannot be broken down into simpler substances by chemical means, whereas compounds are substances that are made up of two or more different elements chemically combined in a fixed ratio.

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The compound that is in the liquid is water.

We know that the compound cobalt chloride can be used to test for the presence of water. The reason why we can be able to use the compound to test for the presence of water is the fact that the color of the anhydrous and the hydrates salt is not the same.

The anhydrous salt is blue in color and that is why the heating of the hydrated salt would make it to turn blue while the hydrtaed compound is foud to be pink in color. Addition of water an removal of water is able to change the color of cobalt chloride.

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Answer:

Explanation:

Molarity = number of moles / volume

If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M

The molarity of the solution will be 7 M.

The total count of moles of solute per liter of a particular solution is known as a solution's molarity.

The volume of just an object is a measurement of how much space it takes up.

Molarity of the solution can be determined by the formula:

\(M_{1} V_{1} = M_{2} V_{2}\)

where, M = molarity of solution. V = volume.

Given data:

\(M_{1}\) = 3.50 M

\(M_{2}\) = ?

\(V_{1}\) = 550 mL

\(V_{2}\) = 275 mL

Now, put the value of given data in molarity equation.

\(V_{2} = M_{1} V_{1} /M_{2}\\V_{2} = (3.50 M) (550 mL) / (275 mL)\\V_{2} = 7 M\)

Therefore, the molarity of the solution will be 7 M.

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Answer:

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\(Ba(OH)_{2}\)  is acting as a base in this reaction

Any material that is slippery to the touch, tastes unpleasant, alters the colour of indicators (such as turning red litmus paper blue), combines with acids to generate salts, and facilitates certain chemical processes is considered a base in chemistry (base catalysis). In aqueous solution, barium hydroxide  \(BaOH_{2}\) creates a potent caustic base.

This equation follows the path of,

acid +base ⇒ salt +water

\(H_{2} S\) \(+ Ba(OH)_{2}\) ⇒ \(BaS + H{2} O\)

Where\(H_{2} S\) is the acid, \(BaOH_{2}\)  is the base and\(2H_{2} O\) is water.

Here, Barium hydroxide reacts with hydrogen sulfide to give barium sulfide and water.

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