ASAP. Magnetic field lines cannot be observed using a compass or iron filings.

True or false

Explanation:

Mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom.

The answer is Water is produced.

Answer:

Explanation:

A. Tabular form of the formation of the compound formed between X and Y (carbon and oxygen):

| Element | Electronic Configuration |

|---------|-------------------------|

| X       | 1s² 2s² 2p⁶ 3s²        |

| Y       | 1s² 2s² 2p⁶ 3s² 3p⁵   |

B. Formation of the compound:

The compound formed between X and Y is carbon dioxide (CO2). Carbon (X) has an electronic configuration of 1s² 2s² 2p⁶ 3s², and oxygen (Y) has an electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁵.

Carbon has 4 valence electrons in its outermost energy level, while oxygen has 6 valence electrons in its outermost energy level. In order to achieve stability, carbon needs to gain 4 electrons, while oxygen needs to gain 2 electrons.

To form the compound CO2, carbon will share electrons with two oxygen atoms. Carbon will share 2 electrons with each oxygen atom, resulting in a double bond between carbon and each oxygen atom.

The formation of the compound can be represented as follows:

O = C = O

2. Drawing the formation of the compound:

In text format, the formation of the compound CO2 can be represented as:

     O

    //

   C

    \\

     O

Here, the central carbon atom (C) is bonded to two oxygen atoms (O) through double bonds. The structure of carbon dioxide is linear, with the carbon atom in the center and the oxygen atoms on either side.

The enzyme that is responsible for the reaction of pyruvate, CoASH and NAD+ to form acetylCoA, CO₂ and NADH + H⁺ is mitochondrial pyruvate dehydrogenase complex.

The complex used as catalyst for the reaction of pyruvate, CoASH and NAD+ to form acetylCoA, CO₂ and NADH + H⁺ is mitochondrial pyruvate dehydrogenase complex. Except this enzyme no other chicken enzyme is discovered which is capable of catalyzing this reaction.

The open reading frames capable of encoding proteins which are closely similar to each of the three authentic human pyruvate dehydrogenase named as E1, E2, and E3 subunits have been identified computationally in the ENSEMBL chicken gene set.

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Exergonic: Reactions with negative delta G°’ values are exergonic reactions that release free energy.Exergonic means that the reaction will occur spontaneously. The value of delta G°’ is less than zero.

Endergonic: When the delta G°’ value is positive, the reaction is endergonic. These are reactions that need to be powered by an external force to occur.

At equilibrium: When delta G°’ = 0, the reaction is at equilibrium. The forward and reverse reactions occur at the same rate, and the concentrations of reactants and products do not change. Thus, the reaction is at equilibrium.

Here is how the K’eq values should be matched with the appropriate delta G°’ values:

K'eq  a. 1 : 0kJ/mol  b. 10⁻⁵ : 22.84 kJ/mol c. 10⁴ : -28.53 kJ/mol  d. 10² : -5.69 kJ/mol  e. 10⁻¹ : 11.42 kJ/mol AG°' (kJ/mol)

Therefore, the correct match for K’eq values with the appropriate delta G°’ values are as follows:

K'eq = 10⁴ corresponds to delta G°’ = -28.53 kJ/mol, which is exergonic.

K'eq = 10⁻⁵ corresponds to delta G°’ = 22.84 kJ/mol, which is endergonic.

K'eq = 10² corresponds to delta G°’ = -5.69 kJ/mol, which is exergonic.

K'eq = 1 corresponds to delta G°’ = 0 kJ/mol, which is at equilibrium.

K'eq = 10⁻¹ corresponds to delta G°’ = 11.42 kJ/mol, which is endergonic.

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Answer:

Sulphur oxide

Explanation:

All of the above oxides with the exception of sulphur oxide are basic oxides and so will not turn blue litmus paper red when dissolved in water. Sulphur oxide, SO2 on the other hand, is an acid anhydride (a non-metallic oxide which dissolves in water to produce acid) rendering it the ability of turning blue litmus paper red when dissolved in water.

Answer:sulpher oxide

Explanation:

All of the compounds except sulpher dioxide are metallic oxide which means basic oxide and base change red litmus paper to blue while acid change blue to red so the answer is the acidic oxide or sulpher dioxide

All possible types of intermolecular forces that can form between particles of :

(a) CS2: London dispersion forces

(b) CH2Br2: Dipole-dipole interaction and H-bonding

What are intermolecular forces?

Intermolecular forces, frequently abbreviated to IMF, are the appealing and repulsive forces that stand up among the molecules of a substance. These forces mediate the interactions among man or woman molecules of a substance. Forces additionally exist among the molecules themselves and those are together called intermolecular forces. Intermolecular forces are specifically answerable for the bodily traits of the substance. There are 5 varieties of intermolecular forces. They are as follows-

Thus, al the types of intermolecular forces possible between particles of :

(a) CS2: London dispersion forces

(b) CH2Br2: Dipole-dipole interaction and H-bonding

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a. MgCl₂

b. NH₄Cl

c. (NH₄)₃PO₄

d. Cu₂O

Citric acid is added to food to add tartness and enhance the flavor. The correct option is b.

Citric acid, a natural compound found in citrus fruits, is commonly added to food for its tart flavor and ability to enhance taste. Here's a step-by-step explanation:

1. Tartness: Citric acid is highly acidic and has a sour taste. When added to food, it provides a sharp, tangy flavor that adds tartness. This tartness can help balance the overall taste profile of a dish, especially in sweet or savory recipes.

2. Flavor enhancement: Citric acid acts as a flavor enhancer, intensifying the existing flavors in food. It has the ability to enhance the perception of other taste sensations, such as sweetness and saltiness, making food taste more vibrant and flavorful.

3. Preservation: Citric acid also acts as a natural preservative in some food products. It has antimicrobial properties that inhibit the growth of certain bacteria and fungi, helping to extend the shelf life of foods and prevent spoilage.

4. pH adjustment: Citric acid can be used to adjust the pH level of certain food products. It is commonly used in canning and preserving processes to create an acidic environment that inhibits bacterial growth and helps maintain product quality and safety.

Overall, the addition of citric acid to food primarily serves to enhance flavor, provide tartness, and potentially contribute to preservation. Option b is the correct one.

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From the arrangement of the options,  Solution A and Solution D are unsaturated.

In a saturated solution, the rate at which the solute dissolves equals the rate at which it precipitates or crystallizes. This indicates that under the existing circumstances, no more solute can be dissolved in the solvent.

Solution A:

Amount of solute added: 20 g

Solubility of solute: 37 g/100 g H₂O

Since the amount of solute added is less than the solubility, Solution A is unsaturated.

Solution D:

Amount of solute added: 7 g

Solubility of solute: 4 g/100 g H₂O

The amount of solute added is less than the solubility, so Solution D is unsaturated.

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Answer:

The answer is B.units of molar mass are g/mol

The balanced chemical equation for the reaction between mercury(II) chlorate and sodium dichromate is:3Hg(ClO3)2 + Na2Cr2O7 → 3HgCrO4 + NaClO3 + NaClFirst, we can calculate the amount of solid precipitate formed using stoichiometry.

The molar mass of Hg(ClO3)2 is 386.61 g/mol.The molar mass of Na2Cr2O7 is 297.80 g/mol.Therefore, the number of moles of Hg(ClO3)2 is:30.91 g ÷ 386.61 g/mol = 0.08 molAnd the number of moles of Na2Cr2O7 is:9.718 g ÷ 297.80 g/mol = 0.03 mol

Using the stoichiometric coefficients, we can see that 3 moles of Hg(ClO3)2 react with 1 mole of Na2Cr2O7 to form 3 moles of HgCrO4.

Therefore, the limiting reactant is Na2Cr2O7 because it forms fewer moles of the product. The amount of Hg(ClO3)2 used is 1/3 of the amount of Na2Cr2O7 used.So, 0.03 mol of Na2Cr2O7 would require 3 × 0.03 mol = 0.09 mol of Hg(ClO3)2 to react completely.

Since only 0.08 mol of Hg(ClO3)2 is available, it is the limiting reactant.So, all of the 0.03 mol of Na2Cr2O7 reacts to form 0.03 × 3 mol = 0.09 mol of HgCrO4.The molar mass of HgCrO4 is 396.66 g/mol.Therefore, the mass of HgCrO4 formed is:0.09 mol × 396.66 g/mol = 35.70 gSo, 35.70 g of solid precipitate will form.

Now, we can calculate the amount of reactant in excess. 0.08 mol of Hg(ClO3)2 reacted with all of the Na2Cr2O7. So, the amount of Hg(ClO3)2 in excess is:0.08 mol - 0 mol = 0.08 molThe mass of Hg(ClO3)2 in excess is:0.08 mol × 386.61 g/mol = 30.93 gTherefore, 30.93 grams of the reactant in excess will remain after the reaction.

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The reaction between 30.91 grams of mercury(II) chlorate and 9.718 grams of sodium dichromate will produce 30.35 grams of solid precipitate (Hg2Cl2) and leave 2.86 grams of sodium dichromate in excess.

To determine the grams of solid precipitate formed and the grams of the reactant in excess, we first need to write the balanced equation for the reaction between mercury(II) chlorate (Hg(ClO3)2) and sodium dichromate (Na2Cr2O7). The balanced equation is as follows:

3 Hg(ClO3)2 + Cr2O7^2- + 14 Na+ → 3 Hg2Cl2 + 2 Cr3+ + 7 NaClO3

According to the balanced equation, 3 moles of mercury(II) chlorate react with 1 mole of sodium dichromate to produce 3 moles of solid mercury(I) chloride (Hg2Cl2).

Calculating the grams of solid precipitate formed (Hg2Cl2):

To determine the grams of solid precipitate formed, we need to calculate the number of moles of mercury(II) chlorate and sodium dichromate, and then use the stoichiometry of the balanced equation to find the number of moles of solid precipitate.

Finally, we can convert the moles to grams using the molar mass of Hg2Cl2.

Molar mass of Hg2Cl2 = 2 * (atomic mass of Hg) + atomic mass of Cl

Molar mass of Hg2Cl2      = 2 * (200.59 g/mol) + 35.45 g/mol

Molar mass of Hg2Cl2     = 436.63 g/mol

Number of moles of Hg(ClO3)2 = mass / molar mass

Number of moles of Hg(ClO3)2  = 30.91 g / (2 * (200.59 g/mol) + 3 * 16.00 g/mol + 2 * 35.45 g/mol)

Number of moles of Hg(ClO3)2   = 30.91 g / 444.22 g/mol

Number of moles of Hg(ClO3)2  = 0.0696 mol

Number of moles of Na2Cr2O7 = mass / molar mass

Number of moles of Na2Cr2O7 = 9.718 g / (2 * 22.99 g/mol + 2 * 52.00 g/mol + 7 * 16.00 g/mol)

Number of moles of Na2Cr2O7  = 9.718 g / 294.95 g/mol

Number of moles of Na2Cr2O7  = 0.0329 mol

From the balanced equation, we can see that the mole ratio of Hg(ClO3)2 to Hg2Cl2 is 3:3. Therefore, the number of moles of Hg2Cl2 formed will be equal to the number of moles of Hg(ClO3)2.

Number of moles of Hg2Cl2 formed = 0.0696 mol

Mass of Hg2Cl2 formed = number of moles * molar mass

Mass of Hg2Cl2 formed   = 0.0696 mol * 436.63 g/mol

Mass of Hg2Cl2 formed   = 30.35 g

Therefore, 30.35 grams of solid precipitate (Hg2Cl2) will form.

Calculating the grams of the reactant in excess (Na2Cr2O7):

To determine the grams of the reactant in excess, we need to compare the stoichiometry of the balanced equation to see which reactant is left over.

Since the mole ratio of Hg(ClO3)2 to Na2Cr2O7 is 3:1, we can calculate the number of moles of Hg(ClO3)2 that react with the available amount of Na2Cr2O7, and then subtract that from the initial moles of Na2Cr2O7 to find the remaining moles.

Finally, we can convert the remaining moles to grams using the molar mass of Na2Cr2O7

Number of moles of Na2Cr2O7 reacted = (number of moles of Hg(ClO3)2) / 3

Number of moles of Na2Cr2O7 reacted  = 0.0696 mol / 3

Number of moles of Na2Cr2O7 reacted  = 0.0232 mol

Number of moles of Na2Cr2O7 remaining = (initial moles of Na2Cr2O7) - (moles of Na2Cr2O7 reacted)

Number of moles of Na2Cr2O7 remainin  = 0.0329 mol - 0.0232 mol

Number of moles of Na2Cr2O7 remaining   = 0.0097 mol

Mass of Na2Cr2O7 remaining = number of moles * molar mass

Mass of Na2Cr2O7 remaining = 0.0097 mol * (2 * 22.99 g/mol + 2 * 52.00 g/mol + 7 * 16.00 g/mol)

Mass of Na2Cr2O7 remaining    = 0.0097 mol * 294.95 g/mol

Mass of Na2Cr2O7 remaining  = 2.86 g

Therefore, 2.86 grams of sodium dichromate (Na2Cr2O7) will remain after the reaction.

The reaction between 30.91 grams of mercury(II) chlorate and 9.718 grams of sodium dichromate will produce 30.35 grams of solid precipitate (Hg2Cl2) and leave 2.86 grams of sodium dichromate in excess.

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Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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The formula for the compound depicted in the image above is Al₂O₃ (option D).

Chemical or molecular formula is a notation indicating the number of atoms of each element present in a compound.

The chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

According to this question, two atoms of aluminium and three atoms of oxygen were given. This means that when they chemically combine, the chemical formula of the resulting molecule will be Al₂O₃.

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Answer: A. H 0  μ1 = μ2 = μ3

Ha  μ1 ≠ 2μ ≠ μ3

2. Test Statistics is 95%

3. Critical F-Value is 3.76.

4. P-Value is 2.32.

5. Conclusion  Reject the null hypothesis.

6. Type of vehicle does effect the amount of green house gas emissions.

The correct order of the steps of a hypothesis test is given below.

1. Determine the null and alternative hypothesis.

2. Select a sample and compute the critical value F-test for the sample mean.

3. Determine the probability at which you will conclude that the sample outcome is very unlikely.

4. Make a decision about the unknown population.

All steps are performed in the given sequence to test a hypothesis.

The null hypothesis is rejected or accepted on the basis of level of significance. When the p-value is greater than level of significance we fail to reject the null hypothesis and null hypothesis is then accepted. It is not necessary that all null hypothesis will be rejected at 95% level of significance. To determine the criteria for accepting or rejecting a null hypothesis we should also consider p-value.

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Explanation:

Answer:

a force is push or pull that act on object as a result of object interaction its surrounding.

Explanation:

Answer: aluminium, mercury , platinum and copper.

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

A general single displacement reaction can be represented as :

\(XY+Z\rightarrow XZ+Y\)

Thus the metals which are more reactive than magnesium will react with magnesium sulphate solution.

The metals which are more reactive than magnesium are aluminium, mercury , platinum and copper.

The molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in litres.
Therefore, the molarity of the H₂CO solution is 13.30 mol/L.

In this case, we have 5.50 L of a 13.3 M H₂CO solution. To find the molarity, we need to calculate the number of moles of H₂CO and divide it by the volume of the solution.

The formula weight of H₂CO is 30.03 g/mol. To convert from molarity to moles, we multiply the molarity by the volume in liters:

13.3 mol/L × 5.50 L = 73.15 mol

So we have 73.15 moles of H₂CO in 5.50 L of solution.

Finally, to find the molarity, we divide the number of moles by the volume of the solution:

73.15 mol ÷ 5.50 L = 13.30 mol/L

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Answer:

10500600m/s

1ds=100m/s

Answer:

Advanced Pharmaceutics Inc

Explanation:

Advanced Pharmaceutics Inc

somehow I know this acroynom

Answer:

\(5.1 \div 5.63\)

At equilibrium, the pH of the solution can be determined by calculating the concentration of hydroxide ions (OH-) in the solution is 11.2.

To do this, we can use the equation for the concentration of hydroxide ions in water:

OH- = (10^(-pOH)) / 10

Since the pH is the negative logarithm of the concentration of hydrogen ions (H+), we can determine the pOH using the equation:

pOH = 14 - pH

Given that the solution is prepared by adding 4 drops of 10 M NaOH to 0.0096 L of pure water, we can calculate the total amount of NaOH added:

Amount of NaOH = 4 drops * 0.0004 L/drop

= 0.0016 L

The total volume of the solution is 1.0 L, so the concentration of NaOH is:

Concentration of NaOH = (0.0016 L)/(1.0 L)

= 0.0016 M

Since NaOH is a strong base, it will dissociate completely in water, meaning that the concentration of hydroxide ions is also 0.0016 M.

Using the equation above, we can find the pOH:

pOH = -log(0.0016) = 2.8

Finally, we can find the pH:

pH = 14 - pOH

= 14 - 2.8

= 11.2

Therefore, at equilibrium, the pH of the solution is 11.2.

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Answer:

          i)  Neon (Ne)

           ii)  Fluoride Ion (F⁻¹)

            iii)  Oxide Ion  (O⁻²)

Explanation:

                  Ions are those charged species which are either positively charged (by loosing electrons) called as cations or negatively charged (by gaining electrons) called as anions.

                 In given examples, Neon is a neutral atom which has an atomic number 10. It contains 10 electrons in its neutral state with the electronic configuration 1s², 2s², 2p⁶.

                 Fluorine atom has an atomic number of 9. Therefore, it contains 9 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁵. When Fluorine atom gains one electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶.

                Oxygen atom has an atomic number of 8. Therefore, it contains 8 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁴. When Oxygen atom gains two electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶ forming an Oxide Ion.

Total mass = number of pennies x mass per penny

Given that you have 125 pennies, and the average penny has a mass of 2.50 g, we can plug in these values to get:

Total mass = 125 x 2.50 g

Total mass = 312.50 g

Therefore, the total mass of the pennies is 312.50 grams.