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Answer:

There are 10 neutrons

Explanation:

Because the atomic number is 8 and the isotope number is 18 (which is the collective protons and neutrons), we can do

18-8=10

Answer:

10

Explanation:

8 proton because it is oxygen

10 neutron because 18-8

Answer:

White color

Explanation:

This compound when heated losses its water of crystallization and become anhydrous copper sulphate

In the Williamson ether synthesis, the reactivity of hydrogen halides is based on their ability to donate a proton and form a stable intermediate.

Hydrogen halides follow the order of reactivity: HI > HBr > HCl. This order of reactivity is due to the size and electronegativity differences between the halogens. HI is the most reactive because it has the largest atomic radius and the weakest bond strength, allowing it to donate a proton more easily. HCl is the least reactive because it has the smallest atomic radius and the strongest bond strength, making it more difficult to donate a proton.

Therefore, in the synthesis of ethers using hydrogen halides, HI is the preferred reagent due to its high reactivity and ability to form stable intermediates.

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The volume of the balloons after they have the  cooled to the outside the temperature is 1.7 L.

The initial volume , V₁ = 2.1 L

The initial temperature, T₁ = 22 °C = 295 K

The final temperature , T₂ = -26 °C = 247 K

The final volume, V₂ = ?

The charles' law is expressed as :

V₁  /  T₁ = V₂ / T₂

V₂ = (2.1 × 247 ) / 295

V₂  = 518.7 / 295

V₂  = 1.7 L

The final volume of the balloon, V₂ = 1.7 L.

Thus, the final volume of the balloons is 1.7 L.

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In this reaction, 3 moles of CO2 would be produced when methane (CHA) fully reacts with 6 moles of Oz.

Methane is an odorless, colorless, flammable gas. Its miles are used ordinarily as gasoline to make heat and light. it is also used to fabricate natural chemicals. Methane can be fashioned by way of the decay of natural substances and is common in landfills, marshes, septic structures, and sewers.

High tiers of methane can lessen the quantity of oxygen breathed from the air. this can result in temper changes, slurred speech, vision problems, memory loss, nausea, vomiting, facial flushing, and headache. In excessive cases, there can be changes in respiratory and coronary heart fee, balance problems, numbness, and unconsciousness.

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Answer:

Explanation:

Answer:

B

Explanation:

Answer:

its  D  I  just  took  the  test

Explanation:

Answer:

sight, taste, touch, hearing and smell

Explanation:

Anything detected with the five senses is considered a sensory perception or sensory experience

Our five senses are sight (vision), hearing (audition), taste (gustation), touch (tactile perception), and smell (olfaction). These senses allow us to perceive and interpret information from the external environment.

When stated as "detected with the five senses," which means gather information about the world around us through these sensory experiences.

For example:

1. Sight (Vision): We perceive visual information through our eyes, allowing us to see colors, shapes, and movements.

2. Hearing (Audition): We perceive auditory information through our ears, allowing us to hear sounds and distinguish between different tones and pitches.

3. Taste (Gustation): We perceive taste sensations through our taste buds on the tongue, allowing us to distinguish between sweet, sour, salty, bitter, and umami flavors.

4. Touch (Tactile Perception): We perceive tactile sensations through our skin, allowing us to feel textures, pressure, temperature, and pain.

5. Smell (Olfaction): We perceive smells through our olfactory system, located in our nose, allowing us to detect and identify various scents and odors.

All the sensory experiences , whether through sight, hearing, taste, touch, or smell, contribute to our understanding of the world and our surroundings.

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Answer:

The most abundant isotope is 1.007 amu.

Explanation:

Given data:

Average atomic mass = 1.008 amu

Mass of first isotope = 1.007 amu

Mass of 2nd isotope = 2.014 amu

Most abundant isotope = ?

Solution:

First of all we will set the fraction for both isotopes

X for the isotopes having mass  2.014 amu

1-x for isotopes having mass 1.007 amu

The average atomic mass is 1.008 amu

we will use the following equation,

2.014x + 1.007  (1-x) = 1.008  

2.014x + 1.007  - 1.007 x = 1.008  

2.014x - 1.007x  =  1.008  -  1.007

1.007 x = 0.001

x= 0.001/ 1.007

x= 0.0009

0.0009 × 100 = 0.09 %

0.09 % is abundance of isotope having mass  2.014 amu because we solve the fraction x.

now we will calculate the abundance of second isotope.

(1-x)

1-0.0009 = 0.9991

0.9991 × 100= 99.91%

The molecular weight of cerium(IV) nitrate hexahydrate is 446.24 g/mol. Therefore, one mole of cerium(IV) nitrate hexahydrate contains one mole of cerium(IV) ions, which will combine with four moles of nitrate ions to form one mole of cerium(IV) nitrate hexahydrate.

The formula for the concentration of ions in a solution is C = n/V where C is the concentration of ions, n is the number of moles of ions, and V is the volume of the solution in liters. The first step in solving this problem is to calculate the number of moles of cerium(IV) nitrate hexahydrate in 150.0 mL of a 0.565 M solution. This can be done using the following formula:n = M x V n = 0.565 mol/L x 0.150 L= 0.08475 mol of cerium(IV) nitrate hexahydrate This amount contains four times as many moles of nitrate ions as cerium(IV) ions.

Therefore, the number of moles of nitrate ions is: nitrate ions = 4 x 0.08475 militate ions = 0.339 molThe volume of the solution is 150.0 mL, which is equal to 0.150 L. Using the formula given above, we can calculate the concentration of nitrate ions :C = n/V= 0.339 mol/0.150 LC = 2.26 M Therefore, the concentration of nitrate ions in the solution is 2.26 M.

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The correct way to write the inverted molar mass of aluminum oxide (Al2O3) as a conversion factor is: Start Fraction 1 mole upper A l subscript 2 upper O subscript 3 over 102.0 grams upper A l subscript 2 upper O subscript 3 EndFraction.

The inverted molar mass of a substance is obtained by taking the reciprocal of its molar mass. In this case, the molar mass of aluminum oxide is given as 102.0 g/mol. To write the inverted molar mass as a conversion factor, we place 1 mole of Al2O3 in the numerator and the molar mass of Al2O3 (102.0 grams) in the denominator. This conversion factor allows us to convert between the number of moles and the mass of Al2O3.

In more detail, the conversion factor can be expressed as follows:

1 mole Al2O3 / 102.0 grams Al2O3

This means that for every 102.0 grams of aluminum oxide, there is 1 mole of aluminum oxide. Conversely, if we have a given mass of Al2O3, we can use this conversion factor to determine the corresponding number of moles, or vice versa. The conversion factor allows us to convert between the mass and the molar quantity of aluminum oxide, enabling us to perform calculations involving moles and grams of the substance.

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Answer:

Look up at the atom on the periodic table of elements and find out what its atomic mass is. Subtract the number of protons from the atomic mass. This is the number of neutrons that the regular version of the atom has. If the number of neutrons in the given atom is different, than it is an isotope.

No, condensing ethanol would not have the same effect on increasing the yield in NH3 production as condensing NH3, as ethanol is not involved in a gaseous equilibrium.

Condensing ethanol would not have the same effect on increasing the yield in NH3 production as condensing NH3. In NH3 production, the yield is increased by removing NH3 as it is a gas at standard conditions.

By condensing NH3 and removing it from the reaction mixture, the equilibrium is shifted towards NH3 production, leading to a higher yield.

Ethanol, on the other hand, is a liquid at standard conditions and not involved in a gaseous equilibrium in the same way as NH3. Condensing ethanol would not affect the equilibrium of an NH3 production reaction in the same manner as condensing NH3.

The presence or removal of ethanol would likely have a minimal impact on the yield of NH3.

In NH3 production processes, the focus is on optimizing reaction conditions and catalysts to favor NH3 formation. Manipulating the concentration of reactants, temperature, and pressure are common strategies to improve the yield of NH3.

While removing ethanol may help maintain reactant concentration, its condensation alone would not directly contribute to increasing the yield of NH3.

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A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.

Hence, Option B is correct answer.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Thus from the above conclusion we can say that A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.

Hence, Option B is correct answer.

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Answer:

[Kr] 4d10 5s2 5p4 is the electronic configuration for tellurium.

Electrons per shell: 2,8,18,18,6

Atomic number: 52

Symbol: Te

Answer:

It is called a negatively charged ion

Answer: A anion or you can call it a ion

LiCl is 89.8 g dissolved.

NaNO3 has the highest solubility.

The amount of a substance that can dissolve in a specific solvent at a specific temperature and pressure is referred to as its solubility. Experimentally, the solubility of a material can be determined by combining it with a fixed amount of solvent in a known amount and then measuring the concentration of the solute in the resulting solution.

In order to measure a substance's solubility, units such as grams of solute per liter of solvent (g/L) or moles of solute per liter of solvent (mol/L) are typically used.

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True. The formation constant, also known as the stability constant, is the equilibrium constant for the reaction in which a complex ion is formed from a metal ion and ligands.

It is a measure of the strength of the bond between the metal ion and the ligands in the complex. The higher the formation constant, the more stable the complex is and the more likely it is to form..

The equilibrium constant is a measure of the extent to which a chemical reaction will proceed to completion. It is the ratio of the concentrations of products to reactants at equilibrium, each raised to their respective stoichiometric coefficients

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Answer:

Adding or removing energy can change the physical matter.

Explanation:

Like for example changing temperature

Answer:

100 times more acidic.

Explanation:

If you look at the pH scale, pH2 is 2 "jumps" away from pH4, therefore, pH2 is 100x more acidic than pH4.

Answer:

12113

Explanation:

step by step:no

The enthalpy change per kilogram of hydrogen is -120 kJ/ g H2

What is enthalpy of a reaction?

A chemical reaction's change in enthalpy that takes place under a constant pressure is known as the "heat of reaction" or "enthalpy of reaction." It is a helpful thermodynamic unit of measurement for figuring out how much energy per mole is emitted or created during a reaction. Enthalpy is a state function as well because it is created by pressure, volume, and internal energy, all of which are state functions.

The reaction is,

2H2(g)+O2(g) = 2H2O(g) H=-484 kJ

The molar weight of hydrogen, which is represented in the equation as H2, is 2.02 g/mol. According to the equation, 2 mol of H2 produce 484 kJ of heat. The heat evolved per gram of hydrogen is calculated by dividing this by the 2 mol H2 and the 2.02 g/mol H2:

(-484 kJ/2 mol H2)(1 mol H2/2.92 g H2) = -120. kJ/g H2

Hence, the enthalpy change per kilogram of hydrogen is -120 kJ/ g H2

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Answer:

To find the least soluble substance at a given temperature we follow the temperature line up and the first substance curve we hit is the least soluble. For most soluble it is the same procedure except the last substance curve hit is the most soluble.

To determine if a substance is more soluble or less soluble based on a solubility curve, you need to compare the solubility values at different temperatures. Here's how you can interpret a solubility curve:

1. Higher Points on the Curve: If a point on the curve is higher, it indicates that the substance is more soluble at that temperature. In other words, at higher temperatures, the substance can dissolve in a greater amount.

2. Lower Points on the Curve: If a point on the curve is lower, it means that the substance is less soluble at that temperature. In this case, at lower temperatures, the substance can dissolve in a smaller amount.

3. Comparing Points: By comparing the solubility values at different temperatures, you can determine which temperature has a higher solubility and which has a lower solubility. The steeper the slope of the curve, the faster the increase or decrease in solubility with temperature.

Solubility curves provide a graphical representation of the relationship between temperature and solubility. They allow you to determine the solubility characteristics of a substance and how it changes with temperature.

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A titration curve is a graph showing the progress of a titration of a mixture of chemicals as a function of the amount of reactant added. A plot of pH vs. quantity of titrant added is a typical titration curve.

The curve's form is determined by the nature of the titrant, the nature of the sample being evaluated, the extent of the acid-base reaction, and the concentration of the reactants. Furthermore, the equivalence point, which is the point at which the quantity of titrant added is just enough to neutralize the sample being titrated, is often indicated on a titration curve. The titration curve for a strong base-weak acid titration and the titration curve for a weak acid-strong base titration differ slightly, with different pH ranges and shapes. In general, the titration curve of a weak acid-strong base titration begins and ends at higher pH values than the titration curve of a strong acid-weak base titration. In addition, the titration curve of a weak acid-strong base titration has a distinct inflection point that is not present in the titration curve of a strong acid-weak base titration.

Finally, the titration curve of a weak acid-strong base titration is shown below. Therefore, let's look at the pH values of NaHCO3 titrated with 1.0 M HCl. 1. pH after 0 mL HCl addedThe pH of NaHCO3, which is a weak base, is slightly basic, or around 8.4.2. pH after 1.0 mL HCl addedWe will see a little decrease in pH when we add 1.0 mL of 1.0 M HCl to 10.0 mL of 1.0 M NaHCO3.3. pH after 9.5 mL HCl addedThe pH of NaHCO3 is about 4.5 at this point. This is the endpoint of the weak acid-strong base titration.4. pH after 10.0 mL HCl addedThe equivalence point is reached after adding 10.0 mL of HCl, which corresponds to the neutralization of 10.0 mL of 1.0 M NaHCO3. The pH at the equivalence point of a weak acid-strong base titration is around 7.0.5. pH after 10.5 mL HCl addedAt this point, the pH of the mixture is more acidic, approximately 3.5.6. pH after 12.0 mL HCl addedThis point will be more acidic than the previous point, and the pH will be around 2.0 to 2.5.

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The Answer for the volume of the object is 2.3 milliliter.

Geometrically measuring the volume of an object with an irregular shape is frequently challenging and challenging. Utilizing the water displacement method is the simplest way to accomplish this. This approach is well-known for being straightforward and precise and is frequently taught in chemistry or other science classes. All you'll need is the appropriate tools.

Submerge the thing in the water. Take another look at the water level to see that it has risen. The new number of units that you measured in the beaker should be noted. The object is included in this level.

To calculate the volume of an item with an irregular shape, subtract the level with the object from the level with the object. If you used a regular beaker, the outcome might be in millimeters.

Given,

Initial volume in the graduated cylinder ,V= 12.2 mL

Final volume of the graduated cylinder after placing an object ,V'= 14.5

Volume occupied by an object = v

The volume of an object will be equal to the volume modified by placing it into the graduate cylinder. So,

v = V' - V = 14.5 mL - 12.2 mL = 2.3 mL

Therefore the volume of the object is =2.3 milliliter  

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The given question is incomplete, the complete question is:

An object placed in a graduated cylinder raises the volume from 12. 2 ml to 14. 5 ml. Find the volume of the object.

The pH of the solution after 20.0 ml of base have been added is 10.67.

Hydrochloric acid has a pH of less than 7.

It also goes by the name Muriatic acid. It is an odorless, colorless solution of the chemical hydrogen chloride in water. For human and most animal digestion, it is a part of stomach acid.

HCl(aq) + NaOH(aq) NaCl(aq) + H2O (1)

I mol HCl reacts with 1 mol NaOH

Mol HCI in 42.0mL of 0.135M Solution:

Mol HCI = 42.0mL / 1000mL/L 0.135 mol/L = 5.67*10^-3 mol

a) Mol NaOH in 0.00mL of 0.150 M solution

Mol NaOH = 0.20 ml/1000mL/L 0.150 mol/L = 3 × 10-3 mol

5.67*10^-3 mol NaOH will react with the 3.0*10^-3 mol HCI and there will be 2.67*10^-5 mol unreacted NaOH in 42 + 20 = 60 mL solution. This is 0.060 L.

Molarity of NaOH solution = (2.67*10^-5)mol/

0.060 L = 7.46*10^-4 M

[OH-] = 4.45*10^-4M

pOH = -log (4.45*10^-4)

POH = 3.35

pH = 14.00-3.35

pH = 10.67

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Answer: D

Recall that boiling points increase with stronger intermolecular forces.

Because halogens are diatomic molecules, they are nonpolar and lack the ability to form hydrogen bonds. Therefore, the only IMF they possess are London dispersion forces.

Among the given choices, the compound with the highest boiling point is I2.

The boiling point is defined as the temperature at which the vapor pressure of a liquid reaches the pressure of the surrounding atmosphere. The boiling point is directly proportional to the strength of the intermolecular forces between the molecules. Among halogens, the intermolecular forces increase with increasing atomic size. Thus, I2 has the highest boiling point due to its large size and strong van der Waals forces.All halogens are non-metals. They all have 7 valence electrons and require only one more electron to achieve the stable noble gas configuration. They have different boiling points because of their intermolecular forces, which are influenced by the number of electrons and the size of the atoms.The boiling point of Iodine (I2) is 184.3 °C. It has the highest boiling point among all the given options. The reason for this is its larger size and strong van der Waals forces. The boiling points of F2, Cl2, and Br2 are -188 °C, -34.04 °C, and 58.78 °C, respectively, which are much lower than that of I2. Thus, the correct option is d. I2.

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