Jesus was conducting an experiment in science class. He took a flask and measured 50ml of vinegar into it. He then measured 10g of baking soda into a balloon and attached

the balloon to the flask, covering the mouth of the flask completely. Next, he puts the flask with the balloon attached on a triple beam balance and finds the total pre-reaction

mass of his experiment
. Finally, leaving the flask/balloon set up on the balance, he lifts the balloon and mixes the chemicals. How should the total mass be affected by the

chemical reaction? This is science

Answer:

The most common forms of N fertilizer include anhydrous ammonia, urea, and urea-ammonium nitrate (UAN) solutions.

Explanation:

In the quantum mechanical wave model of orbitals, the atomic orbital may be expressed as a probability density.

Electrons are described using orbitals and energy levels in quantum mechanical theory. Its base is Schrodinger's wave equation. This complicated model takes into consideration the electron's wave-particle duality.

An atom's orbital, according to quantum physics, is the place having the highest chances of harbouring an electron. There is a mathematical definition for this.

The probability density is investigated in respect to the shapes of these orbitals. The wave function is defined by its square.

This model is concerned with quantum numbers, which may be utilised to locate electrons at different energy levels.

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Considering the definition of molality, the molality of the KCl in the solution is 6.56 moles/kg.

Molality, or molal concentration, is the amount of a substance dissolved in a given mass of solvent. It is defined as the moles of a solute per kilogram of solvent.

The Molality of a solution is determined by the expression:

molality= number of moles of solute÷ kilograms of solvent

Molality in this case

In this case, you know:

mass of KCl= 105 g

mass molar of KCl= 74.55 g/mole

number of moles of solute= mass of KCl÷ mass molar of KCl= 105 g÷ 74.55 g/mole= 1.41 moles

Mass of solvent = 215 g of water= 0.215 kg (being 1000 g=1 kg)  

Replacing in the definition of molality:

Molality= 1.41 moles÷ 0.215 kg

Molality= 6.56 moles/kg

The molality of the solution is 6.56 moles/kg.

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Answer:

the motion is different.

Explanation:

the the motion is different because the particle in a book is solid particles and solid are packed together so so they can't move freely but while the the particles in the air around it is gas particles and it are packed very loose and can move very easily anywhere like .Example - solid-book , eraser. gas-helium, oxygen.

The ratio of the mass of compounds:

a. 2Na + Cl\(_{2}\) → 2NaCl = 46 + 70 → 46 : 70

b. H\(_{2}\)O + NaO → 2NaOH = 1 : 8 + 23 : 16 → 23 : 16 : 1

c. HCl + NaOH → NaCl + H\(_{2}\)O = 1 : 35 + 23 : 35 → 23 : 35 + 1: 8

What is a  molecular mass?

Molecular mass refers to the total sum of the masses of the atoms or components that make up the molecule.

Calculation:

a. 2Na + Cl\(_{2}\) → 2NaCl

(Na x 2) + (Cl x 2) → (Na x 2) : (Cl x 2)

(23 x 2) + (35 x 2) → (23 x 2) : (35 x 2)

46 + 70 → 46 : 70

b. H\(_{2}\)O + NaO → 2NaOH

(H x 2) : (O x 1) + (Na x 1) : (O x 1) → (Na x 2) : (O x 2) : (H x 2)

(1 x 2) : (16 x 1) + (23 x 1) : (16 x 1) → (23 x 2) : (16 x 2) : (1 x 2)

2 : 16 + 23 : 16 → 46 : 32 : 2

1 : 8 + 23 : 16 → 23 : 16 : 1

c. HCl + NaOH → NaCl + H\(_{2}\)O

(H x 1) : (Cl x 1) + (Na x 1) : (Cl x 1) → (Na x 1) : (Cl x 1): (H x 2) : (O x 1)

(1 x 1) : (35 x 1) + (23 x 1) : (35 x 1) → (23 x 1) : (35 x 1) : (1 x 2) : (16 x 1)

1 : 35 + 23 : 35 → 23: 35 + 2: 16

1 : 35 + 23 : 35 → 23 : 35 + 1: 8

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a) To determine the number of grams of I2 needed to react with 36.7 g of N2H4, we need to use stoichiometry.

The balanced equation for the reaction is:

2I2 + N2H4 → 4HI + N2

From the equation, we can see that 2 moles of I2 react with 1 mole of N2H4 to produce 4 moles of HI. So, the mole ratio of I2 to N2H4 is 2:1.

First, we need to determine the number of moles of N2H4 in 36.7 g:

moles of N2H4 = mass / molar mass

moles of N2H4 = 36.7 g / 32.045 g/mol

moles of N2H4 = 1.146 mol

Since the mole ratio of I2 to N2H4 is 2:1, we need half as many moles of I2 as there are moles of N2H4:

moles of I2 = 1.146 mol / 2

moles of I2 = 0.573 mol

Finally, we can calculate the number of grams of I2 needed:

mass of I2 = moles of I2 x molar mass of I2

mass of I2 = 0.573 mol x 253.81 g/mol

mass of I2 = 145.5 g

Therefore, 145.5 grams of I2 are needed to react with 36.7 grams of N2H4.

b) To determine the number of grams of HI produced from the reaction of 115.7 g of N2H4 with excess iodine, we need to use stoichiometry again.

The balanced equation for the reaction is:

2I2 + N2H4 → 4HI + N2

From the equation, we can see that 2 moles of I2 react with 1 mole of N2H4 to produce 4 moles of HI. So, the mole ratio of HI to N2H4 is 4:1.

First, we need to determine the number of moles of N2H4 in 115.7 g:

moles of N2H4 = mass / molar mass

moles of N2H4 = 115.7 g / 32.045 g/mol

moles of N2H4 = 3.609 mol

Since the mole ratio of HI to N2H4 is 4:1, we can calculate the number of moles of HI produced:

moles of HI = 4 x moles of N2H4

moles of HI = 4 x 3.609 mol

moles of HI = 14.436 mol

Finally, we can calculate the number of grams of HI produced:

mass of HI = moles of HI x molar mass of HI

mass of HI = 14.436 mol x 127.91 g/mol

mass of HI = 1846.5 g

Therefore, 1846.5 grams of HI are produced from the reaction of 115.7 grams of N2H4 with excess iodine.

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Answer:

T₂ = 800 K

Explanation:

Given that,

Initial temperature of the gas, T₁ = 127°C = 400 K

Initial volume, V₁ = 10 L

Final volume, V₂ = 20 L

We need to find the new temperature.

The volume of a gas is directly proportional to its Kelvin temperature.

Let T₂ is the new temperature. So,

\(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{20\times 400}{10}\\\\T_2=800\ K\)

So, the new temperature of the gas is 800 K.

Answer:

chicken fox

Explanation:

The ratio of the volume and temperature of the gas in the given table is as follows:

Charles's law, also known as the law of volumes, describes the relationship between the volume and temperature of a gas at a constant pressure. According to this law, the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin) when the pressure is constant.

In other words, as the temperature of a gas increases, its volume will also increase proportionally, and vice versa. Mathematically, Charles's law can be expressed as:

V/T = k

where V is the volume of the gas, T is its temperature in Kelvin, and k is a constant of proportionality.

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The two properties of the atomic structure of copper that make it a good conductor is:

In copper, at normal room temperature, there is enough thermal energy to eject a large number of weakly held valence electrons. Like other metals, copper has a large number of free electrons, which makes it a good conductor of electricity.

In order for current to flow through metal, the current source must fight resistance. The lower the resistivity, the higher the electrical conductivity of the metal. Copper wire is also a good electrical conductor due to its low resistivity.

Other materials sometimes used as conductors are silver, gold, and aluminum. Copper is still the most popular material for wire because it is a very good conductor of electricity and is very cheap compared to gold and silver.

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Answer: C

Explanation:

Increasing the temperature increases the rate of dissolving.

The answer choice which describes the energy transformation in this electrical circuit is: C. Chemical energy to electric energy to light energy.

An electrical circuit can be defined as an interconnection of electrical components so as to create a path for the flow of electric current (electrons) as a result of a driving voltage or potential difference.

The components of an electrical circuit.

Generally, an electric circuit comprises the following electrical components:

In this scenario, the type of energy transformation that occurs in this electrical circuit is chemical energy generated by the battery to electric energy, which is generated when the switch is turned ON and then to light energy generated by the light bulb.

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Answer:

.

Explanation:

3. (a) Ni electrode can serve as the standard electrode as its reduction potential is zero. It can act a reference standard electrode as the species with reduction potential values more positive to it will get reduced and species with reduction potential values more negative to it will get oxidized. Thus Ni electrode can serve as reference standard electrode.

(b) Cu2+ ion is most easily reduced as it has positive reduction value thus it act as good oxidizing agent by oxidizing other an itself get reduced.

(c) Al metal is most easily oxidized as it has most negative reduction potential value thus it act as good reducing agent by reducing others and itself get oxidized.

(d) Copper and aluminium electrodes are connected to battery to form a spontaneous cell

(i) Al is oxidized as it has negative reduction potential value, thus it loses 3 electrons and form Al3+ ion.

(ii) Al metal act as anode. Because at anode always oxidation takes place. So Al is oxidized to Al3+ at anode.

(iii) At anode: 2 Al (s) 1  2 Al3+ (aq) + 6e-

At cathode: 3 Cu2+ (aq) + 6e- 1  3 Cu (s)  

Net ionic equation: 2 Al (s) +  3 Cu2+ (aq) 1  2 Al3+ (aq) + 3 Cu (s) 

(iv) E0cell = E0cathode - E0anode 

E0cathode = E0Cu2+/ Cu  = 0.62 V                

E0anode = E0Al3+ / Al = -1.38 V

E0cell  = 0.62 V - (-1.38) V = 2 V

As the standard electrode potential of cell is positive, thus the cell reaction is spontanoeus and will proceed in forward direction.

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Answer: Each molecule has a characteristic size and shape that determines its function in the living cell

Explanation:

The shapes of molecules are determined by the positions of the atoms' orbitals. When an atom forms covalent bonds, the orbitals in its valence shell are rearranged.

If someone who look up to does anything that makes you want to do something, this is known as direct pressure directly from the other person's mouth. The plan you use to accomplish the goal it your activity.

The Standard unit for pressures seems to be the pascal (Pa), which is equal to one newton / square meter (N/m2) of pressure is defined of surface. An object's pressure is inversely related to its force and proportional to both

Pressure is created by molecules moving quickly and crashing into the container's walls. The quantity and intensity of molecular collisions in a given region determine the pressure there.

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Answer:

Freezing/Solidification

The coenzyme that is not permanently bound to the pyruvate dehydrogenase (PDH) complex is Coenzyme A (CoA). Other coenzymes, such as thiamine pyrophosphate (TPP), flavin adenine dinucleotide (FAD), and nicotinamide adenine dinucleotide (NAD+) are more tightly associated with the complex, but CoA is more loosely bound and readily dissociates after its role in the reaction is completed.

The coenzyme that is not permanently bound to the PDH complex is coenzyme A (CoA). While CoA plays a crucial role in the PDH reaction by carrying the acetyl group to the next step in the citric acid cycle, it is not permanently bound to the PDH complex. Instead, CoA is released after the acetyl group is transferred to the enzyme in the next step of the pathway. This is a long answer because it provides an explanation of the role of CoA in the PDH complex and how it is used in the citric acid cycle.

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Answer:

the answer is pH

Explanation:

Just took it on ed2020

Answer:

The first part is pH

The second part is calibrate

The third part is all three

Using various concentrations of HCl and NaOH to measure a range of pH

Using an existing scale to determine pH

Knowing that the cabbage indicator always has the same color at a given pH value

Explanation:

Answer:

d. Methanol is more acidic than the alkyne and will be deprotonated instead.

Explanation:

because acidity is the ability to lose H+, leaving an anion behind; acidity depends on the stability of the anion.

Plasmas are less dense than solids or liquids and have no set shape or volume. Plasmas are made up of atoms with some or all of their electrons stripped away and positively charged nuclei, known as ions, roaming freely.

Plasmas is defined as a type of substance in which numerous electrons freely roam around the nuclei of the atoms.

Plasma has been referred to as the fourth state of matter, alongside solid, liquid, and gas.

When one or more electrons are ripped from an atom, they form a plasma.

Thus, plasmas are less dense than solids or liquids and have no set shape or volume. Plasmas are made up of atoms with some or all of their electrons stripped away and positively charged nuclei, known as ions, roaming freely.

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Answer:

20g

Explanation:

Let's review the formula to find the mass of an object: M = V * D

M = 5 g/ml * 4ml

(We can think of g/ml * ml as \(\frac{g}{ml}\)*ml, so the ml cancels out, just leaving g)

M = 20g

Hope this helped! Let me know if you need anymore clarification

Answer:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

The coefficients are: 1, 6, 3, 2

Explanation:

__Fe₂(SO₄)₃ + __KOH —> __K₂SO₄ + __Fe(OH)₃

To determine the correct coefficients, we shall balance the equation. This can be obtained as follow:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + Fe(OH)₃

There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 2 before Fe(OH)₃ as shown below:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of OH on the right side and 1 atom on the left side. It can be balance by writing 6 before KOH as shown below:

Fe₂(SO₄)₃ + 6KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of K on the left side and 2 atoms on the right side. It can be balance by writing 3 before K₂SO₄ as shown below:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

Now, the equation is balanced.

Therefore, the coefficients are: 1, 6, 3, 2

A pharmaceutical company's human resource manager is starting the hiring process for a new chemist. She would start by going through orientation.

The strategic method of developing and assisting people and providing a positive work environment is known as human resource management. Although its duties vary across various organizations and industries, they often include hiring, paying and providing benefits, providing training and development, and managing employee relations.

To appreciate the significance of hiring and staffing should be aware of Orientation and Induction's significance. being aware of the significance of training and development to appreciate the significance of performance management and evaluation in order to appreciate the significance of employee retention

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Among the given gases, the gas that shows the greatest deviation from ideal behavior at 25 degrees Celsius and 1 atm is likely to be H2 (hydrogen).

1. Size and shape of molecules: Hydrogen gas (H2) consists of diatomic molecules that are very small in size. The size of the hydrogen molecule is relatively larger compared to other gases such as CH4 (methane), SO2 (sulfur dioxide), and O2 (oxygen). The small size of hydrogen molecules leads to a higher probability of molecular interactions and deviations from ideal behavior.

2. Intermolecular forces: Hydrogen gas has relatively weak intermolecular forces compared to other gases. Although it exhibits London dispersion forces, these forces are not as strong as the dipole-dipole interactions in molecules like SO2 and CH4 or the formation of double bonds in O2. The weaker intermolecular forces in hydrogen contribute to larger deviations from ideal behavior.

Based on the size and shape of molecules as well as the strength of intermolecular forces, hydrogen gas (H2) is expected to show the greatest deviation from ideal behavior among the given gases at 25 degrees Celsius and 1 atm.

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Answer:

B) They will react because X and Y can share two pairs of electrons to become stable

Explanation:

The electron configurations of two elements x and y are given :

X: 1s2 2s2 2p6

Y: 1s2 2s2 2p6 3s2 3p6

The statement that is true for both the elements is that, they both will react as they both can share two pairs of electrons to become stable.

To become stable the outermost shell or p orbital should have 8 electrons, so element X  can gain 2 atoms to become stable.

Element Y can also react as it can also share two atoms to fulfill its 3p orbital and will stable.

Hence, the correct option is "B".

Answer:

Explanation:

0.180 moles of Ba(OH)2 are present.

Answer:

\(\boxed {\boxed {\sf 0.123 \ mol \ Ba(OH)_2}}\)

Explanation:

Molarity is a measure of concentration in moles per liter. It is calculated using the following formula:

\(molarity= \frac{moles \ of \ solute}{liters \ of \ solution}\)

The molarity of the solution is 0.600 M Ba(OH)₂. 1 molar (M) is also equal to 1 mole per liter, so the molarity is 0.600 moles of Ba(OH)₂ per liter.

The volume of the solution is 205 milliliters, however, we need to convert the volume to liters. Remember that 1 liter contains 1000 milliliters.

Now we know the molarity and volume, but the moles are still unknown.

Substitute these values into the formula.

\(0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L}\)

We are solving for x or the moles of solute, so we must isolate the variable. It is being divided by 0.205 liters. The inverse of division is multiplication. Multiply both sides by 0.205 L.

\(0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L} * 0.205 \ L\)

\(0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L =x\)

The units of liters cancel.

\(0.205 *0.600 \ mol \ Ba(OH)_2 =x\)

\(0.123 \ mol \ Ba (OH)_2 = x\)

The original measurements had at least 3 significant figures. Our answer currently has 3 sig figs, so we don't need to round.

There are 0.123 moles of barium hydroxide.

Answer: Halogens are highly reactive, and they can be harmful or lethal to biological organisms in sufficient quantities. This reactivity is due to high electronegativity and high effective nuclear charge. Halogens can gain an electron by reacting with atoms of other elements. Fluorine is one of the most reactive elements.

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