Question 18
Identify the Type of Chemical Reaction: 2Ago - 2Ag + 02
1
Answer
F) Synthesis or Combination Reaction
G) Decomposition Reaction
H) Single Replacement Reaction
1 Double Replacement Reaction
K) Combustion Reaction

Answer:

1.5 eq. of charge are present.

Explanation:

In therms of charge, 1 equivalent of charge is defined as the moles of a monovalent ion (That is of charge +1 or -1) necessaries to neutralize the charge of the ion that we are studying.

In PO₄³⁻ ion there are 3 equivalents of charge per mole of PO₄³⁻. In 0.5 moles of this ion there are:

0.5 moles PO₄³⁻ * (3Eq. / 1 mol PO₄³⁻) =

Answer:

Inference  — The candle stayed lit longer because the plant gave off oxygen.

Observation — The candle went out when it was placed in a closed jar.

Observation — The candle stayed lit longer in closed jar when a plant was present.

Explanation:

Tap the THANKS button and RATE ⭐️

(If helpful)

Joseph Priestley discovered the element oxygen which is most precious for living. He discovered the need of oxygen to respire and release by plants during photosynthesis.

Photosynthesis is the process of synthesis of glucose using carbon dioxide and water with the aid of light energy. The process makes energy for all the living organism in earth.

Plants uptake carbon dioxide and release oxygen during photosynthesis which makes oxygen abundant in the atmosphere.Thus, presence of plants give us air and remove carbon dioxide formed by respiration.

Priestley's conducted an experiment with a mouse placed in a closed jar and candle light inside. When the jar is close, there will be no air inside make the rat perish and candle light off. When he placed a plant inside the jar it released oxygen which made the rat alive a little longer.

Candle light stayed a lit longer by the presence of the plant. Thus option A is correct. Priestley concluded that buring needs oxygen.

To find more about oxygen, refer the link below:

https://brainly.com/question/2272415

#SPJ2

Answer: 1. halve

2. halve

3. double

Explanation:

The relationship between wavelength and energy of the wave follows the equation:

\(E=\frac{hc}{\lambda}\)

E= energy

\(\lambda \) = wavelength of the wave

h = Planck's constant  

c = speed of light

Thus as wavelength and energy have inverse realation, when wavelength will halve , energy will double.

2. The between wavenumber and energy of the wave follows the equation:

\(E=h\times c\times \bar{\nu}\)

E= energy

\(\bar{\nu}\)\(\nubar\) = wavenumber of the wave

h = Planck's constant  

c = speed of light

Thus as wavenumber and energy have direct relation, when wavenumber will halve , energy will be halved.

3. The relationship between energy and frequency of the wave follows the equation:

\(E=h\times \nu\)

where

E = energy

h = Planck's constant  

\(\nu\) = frequency of the wave

Thus as frequency and energy have direct realation, when frequency will double , energy will double.

Answer:

CnH2n+2

Explanation:

Alkane have double and two atoms of hydrogen than carbon atoms

Like C4H10

n = 4

CnH2n+2

C4H2×4+2

C4H10

When hydrogen bromide is added to 2-methylbut-2-ene, two products are expected to be produced: 2-bromo-2-methylbutane (major product) and 3-bromo-2-methylbutane (minor product).

The addition of HBr to 2-methylbut-2-ene follows the Markovnikov addition rule. This means that the hydrogen atom and the bromine atom will add to the carbon atoms in the double bond, such that the hydrogen atom adds to the carbon with the greater number of hydrogen atoms, and the bromine atom adds to the carbon with the lesser number of hydrogen atoms.

In this case, the hydrogen atom will attach to the second carbon atom, which has three hydrogen atoms, while the bromine atom will attach to the third carbon atom, which has only one hydrogen atom. This produces the major product, 2-bromo-2-methylbutane.

The formation of the minor product, 3-bromo-2-methylbutane, occurs due to the rearrangement of the carbocation intermediate formed during the addition reaction. The carbocation can rearrange either by shifting a methyl group from the second to the third carbon, or by shifting a hydrogen atom from the third to the second carbon. This rearrangement produces the minor product, 3-bromo-2-methylbutane.

In conclusion, the addition of HBr to 2-methylbut-2-ene produces two products: 2-bromo-2-methylbutane (major product) and 3-bromo-2-methylbutane (minor product). The major product forms due to Markovnikov addition rule, while the minor product forms due to carbocation rearrangement.

for more such questions on products

https://brainly.com/question/16859279

#SPJ8

To convert grams (g) of a substance to moles (mol), you need to divide the mass by the molar mass of the substance.

The molar mass of Be(NO2)2 can be calculated by adding the molar masses of its constituent atoms, which are:

The molar mass of Be: 9.01 g/mol

The molar mass of N: 14.01 g/mol

The molar mass of O: 16.00 g/mol (there are two oxygen atoms in the nitrite ion, NO2-)

So the molar mass of Be(NO2)2 is:

9.01 g/mol (Be) + 2(14.01 g/mol (N) + 2(16.00 g/mol (O)) = 9.01 g/mol + 28.02 g/mol + 32.00 g/mol = 69.03 g/mol

Now we can use this molar mass to convert 11.9 g of Be(NO2)2 to moles:

moles = mass/molar mass

moles = 11.9 g / 69.03 g/mol

moles ≈ 0.1727 mol

Therefore, 11.9 g of Be(NO2)2 is equivalent to approximately 0.1727 moles.

\(Question\)

How to solve 20.0 mL/ 5.7 g with significant figures and including units?

Answer:

\(p = 0.25 g/cm3\)

Hope this Helps!!

\(xXxAnimexXx\)

The formula for density is the mass of an object divided by its volume. In equation form, that's d = m/v , where d is the density, m is the mass and v is the volume of the object. The standard units are kg/m³.

The options that affect the amount that the freezing point is lowered by the addition of the solute include :

The increasing of a solvent's boiling point as a result of the addition of a solute is known as boiling point elevation. Similar to freezing point depression, adding a solute lowers the freezing point of a solvent. In actuality, a solvent's freezing point drops as its boiling point rises.

Any solvent's freezing point will be lowered by the presence of a solute; this action is known as freezing-point depression. The fact that the solute is present in the liquid solution but not in the pure solid solvent is crucial to understanding this phenomenon.

This includes the compound being ionic or the solubility of the solvent.

Find out more on freezing point at https://brainly.com/question/40140

#SPJ1

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

\(n = \frac{5.65 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 938.5382\)

We have the final answer as

Hope this helps you

Answer:

A = 252 * 0.04 * 0.0028 = 0.275584

Therefore, the absorbance of the solution in a 4.00 mm pathlength cell is approximately 0.28.

Explanation:

Answer:

0.28

Explanation:

The formula to calculate the absorbance of a solution is given by:

A = ε * l * c

Where:

A = absorbance

ε = molar absorptivity (L/mol cm)

l = pathlength (cm)

c = concentration (mol/L)

The molar absorptivity of the solute at 500 nm is 252 M^-1cm^-1, and the concentration of the solute in the solution is 0.00140 moles in 500.0 mL, so c = 0.00140 / 0.500 = 0.0028 M.

A = ε * l * c = 252 M^-1 cm^-1 * 4.00 mm * 0.00280 M = 2.16

So, the absorbance in a 4.00 mm pathlength cell would be 2.16.

The period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing

The pendulum is a device that could be used to demonstrate oscillatory motion. We know that the pendulum has a long string that is fastened to a support. The bulb is displaced at a small angle and the period is the time that is taken to complete the cycle.

The kind of motion that is undergone by a pendulum is what we define as the oscillatory motion. It is a regular repeating motion and the acceleration is directed always towards the center of the motion.

We can tell that the pendulum swings from one side to the other and we could use the stop clock to measure the movement of the pendulum. Thus it follows that the period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing.

Learn more about pendulum:https://brainly.com/question/14759840

#SPJ1

The plane of the Moon's orbit around the Earth is tilted by 5° with respect to the plane of the Earth's orbit around the Sun, the ecliptic. This tilt prevents an eclipse from occurring at every new and full moon. In a lunar eclipse, the observer watches the Earth's shadow fall on the Moon.

Answer:

Because there is no light in space so there is no shadow

Answer:

2.109 atm

Explanation:

This is Gay-Lussac's Law when the temperature of a sample of gas in a rigid container is increased, the pressure of the gas increases as well. The increase in kinetic energy results in the molecules of gas striking the walls of the container with more force, resulting in a greater pressure. Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant. Gay-Lussac's Law is very similar to Charles's Law, with the only difference being the type of container.

So for this one:

\(\frac{P_{1} }{T_{1}} =\frac{P_{2} }{T_{2}}\)

Rearrange it to

P2= (P1 x T2)/T1

P2= (450 x 1.5)/320 = 2.109 atm

The theoretical yield of the reaction is 1.13 g. The acid is the limiting reactant.

In a given chemical reaction, the theoretical yield can only be obtained from the balanced reaction equation. We have been given the balanced reaction equation in the question so we can work from there.

Number of moles of Cr =  0.50 g /52 g/mol = 9.6 * 10^-3 moles

Number of moles of acid =  0.75 g/98 g/mol = 7.7 * 10^-3 moles

Given that the reaction is 1:1, the limiting reactant would be the acid.

The theoretical yield is obtained from;

Number of moles of product * molar mass of product

We substitute to obtain;

7.7 * 10^-3 moles * 147 g/mole (since the reaction is 1:1)

= 1.13 g

Learn more about theoretical yield:https://brainly.com/question/14966377

#SPJ1

Answer:

Clouds are water

Explanation:

When a gas gathers up into a cloud,the cloud starts to rain and water comes out of the cloud.

Nitrogen is a chemical element with the symbol N and atomic number 7. It is a nonmetal and makes up about 78% of the Earth's atmosphere. Nitrogen is essential for all forms of life on Earth as it is a critical component of DNA, RNA, and proteins.

Uses:

Nitrogen has many uses in industry, agriculture, and medicine. In the industrial sector, nitrogen is used in the production of ammonia, which is used to make fertilizers, explosives, and other chemicals. Nitrogen gas is also used to create a controlled atmosphere in food storage and packaging, to prevent spoilage and preserve freshness. In the medical field, nitrogen is used to preserve blood, tissues, and other biological samples.

Process:

Nitrogen gas is produced through a process called fractional distillation, which separates the gases in the air based on their boiling points. Nitrogen gas is obtained by cooling air until it becomes a liquid, and then slowly warming it up again. Nitrogen gas boils at a lower temperature than oxygen gas, so it is collected as a gas as the temperature rises.

Nitrogen Cycle:

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms in the environment. The nitrogen cycle is important because it allows nitrogen to be used by living organisms, and it helps to regulate the levels of nitrogen in the atmosphere and in the soil.

The nitrogen cycle consists of four main stages: nitrogen fixation, nitrification, denitrification, and ammonification. Nitrogen fixation is the process by which nitrogen gas from the atmosphere is converted into a form that can be used by living organisms, such as ammonia or nitrate. This process is carried out by certain types of bacteria that live in the soil or in the roots of plants.

Nitrification is the process by which ammonia is converted into nitrate by other types of bacteria. This nitrate can then be absorbed by plants and used to make proteins and other essential molecules.

Denitrification is the process by which nitrate is converted back into nitrogen gas, which is released back into the atmosphere. This process is carried out by certain types of bacteria that live in oxygen-poor environments, such as wetlands or soils that are waterlogged.

Ammonification is the process by which organic nitrogen compounds, such as proteins or amino acids, are broken down into ammonia by bacteria and fungi. This ammonia can then be used by other organisms in the nitrogen cycle.

Testing:

The most common test for the presence of nitrogen is the Kjeldahl method, which is used to determine the amount of nitrogen in organic compounds. The Kjeldahl method involves heating a sample of the organic compound with sulfuric acid, which converts the nitrogen into ammonia. The ammonia is then distilled off and collected in a solution of boric acid, which forms a compound called ammonium borate. The amount of nitrogen in the original sample can then be determined by measuring the amount of ammonium borate that is produced.

A 25.0 mL solution of Sr(OH)₂ is neutralized with 31.6 mL of 0.150 M HBr, then the concentration of the original Sr(OH)₂ solution is 0.189M.

Concentration of the solution will be calculated by using the below chemical reaction as:

M₁V₁ = M₂V₂, where

M₁ & V₁ is the molarity and volume of HBr solution and M₂ & V₂ is the molarity and volume of original Sr(OH)₂ solution.

On putting values on above equation by taking from question, we get

M₂ = (0.15)(31.6) / (25) = 0.189 M

Hence required molarity of Sr(OH)₂ solution is 0.189M.

To know more about molarity, visit the below link:

https://brainly.com/question/24305514

#SPJ1

Answer:

Explanation:

Adding sugar

This is some information about the potential energy.

Explanation:

Please follow me...

To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

To learn more about FeCl₃, refer to the link:

https://brainly.com/question/32098087

#SPJ1

NaCl+AgNO_3-->AgCl+NaNO_3

on both sides

Hence it's balanced already

Answer:

It's a compound.

Pls mrk me brainliest

Answer:

N− has the outer electron structure of 2s22p4. This means we have coulombic repulsion in one of the p orbitals which means adding a single electron will be endothermic. This accounts for the decrease in ionization energy between N and O.

Explanation:

Please mark as brainliest

The process is replication

In the process of cell division and synthesis of new DNA, the stage after replication is called as transcription at which the DNA segments are copied into a RNA molecule.

Replication is the process of dividing the a DNA segment into two equivalent strands. After replication, these two strands will pair with their complementary  RNA strands and the second stage is called transcription.

The process of transcribing a section of DNA into RNA is known as transcription. Messenger RNA is created when specific DNA sequences are translated into RNA molecules that can encode proteins (mRNA).

Non-coding RNAs are RNA molecules that contain copies of other DNA sequences (ncRNAs). The RNA is termed as messenger RNA (mRNA) if the stretch of DNA is translated into an RNA molecule that encodes a protein. The mRNA then acts as a template for the translation of the protein.

To find more on transcription, refer here:

https://brainly.com/question/14136689

#SPJ2

Answer:

The answer is B, in this case.

Explanation:

An isomer is a molecule with the same number of atoms as another compound, but they differ in arrangement of the atoms.

Answer:

A

Explanation:

According to the chart, A tv turns into heat, light, and sound energy.