What is the molar mass of Ammonium Carbonate?

Answer:

0.583 kilojoules

Explanation:

The amount of heat required to pop a single kernel can be calculated using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of water (g)

c = specific heat capacity of water (4.184 J/g°C)

∆T = change in temperature

From the given information, m = 0.905 g, initial temperature (room temperature) = 21°C , final temperature = 175°C, Q = ?

Q = m × c × ∆T

Q = 0.905 × 4.184 × (175°C - 21°C)

Q = 3.786 × 154

Q = 583.044 Joules

In kilojoules i.e. we divide by 1000, the amount of heat is:

= 583.04/1000

= 0.583 kilojoules

A. 0.2 mole of HCl is needed for the reaction

B. The molarity of NaOH solution is 0.04 M

C. The molarity of HCl is 0.043 M

Molarity is defined as the mole of solute per unit litre of the solution.

We'll begin by calculating the number of mole of NaOH in the solution.

Volume = 0.1 L

Molarity of NaOH = 2 M

Mole = Molarity x Volume

Mole of NaOH = 2 × 0.1

Finally, we shall determine mole of HCl.

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of NaOH required 1 mole of HCl.

Therefore, 0.2 mole of NaOH will also require 0.2 mole of HCl.

Thus, 0.2 mole of HCl is needed for the reaction.

HCl + NaOH —> NaCl + H₂O

From the balanced equation,

Mole ratio of the acid, HCl (nA) = 1

Mole ratio of the base, NaOH (nB) = 1

From the question given above above,

Volume of acid, HCl (Va) = 0.025 L

Molarity of acid, HCl (Ma) = 0.05 M

Volume of base, NaOH (Vb) = 0.034 L

Mava / mbvb = na/nb

0.05 x 0.025 / Mb x 0.034 = 1

0.00125 / Mb x 0.034 = 1

Cross multiply

Mb x 0.034 = 0.00125

Divide both side by 0.034

Mb = 0.00125 / 0.034

Mb = 0.04 M

Therefore, the molarity of NaOH is 0.04 M

From the question given above above,

Volume of base, NaOH (Vb) = 0.054 L

Molarity of base, NaOH (Mb) = 0.1 M

Volume of acid, HCl (Va) = 0.125 L

Mole ratio of the acid, HCl (nA) = 1

Mole ratio of the base, NaOH (nB) = 1

Mava / mbvb = na/nb

Ma x 0.125 / 0.1 x 0.054 = 1

Ma x 0.125 / 0.0054 = 1

Cross multiply

Ma × 0.125 = 0.0054

Divide both side by 0.125

Ma = 0.0054/0.125

Therefore, the molarity of the HCl is 0.043 M

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The temperature of the mixture will be approximately 32°C.

To determine the final temperature of the mixture, we can use the principle of conservation of energy. The energy gained or lost by a substance can be calculated using the equation:

Q = m * c * ΔT

where:
Q = heat energy gained or lost
m = mass of the substance
c = specific heat capacity of the substance
ΔT = change in temperature

Let's calculate the heat energy gained or lost by each component separately and then equate them to find the final temperature.

For ice:
m_ice = 40 g
c_ice = 2.09 J/g°C (specific heat capacity of ice)
ΔT_ice = final temperature - 0°C (change in temperature)

Q_ice = m_ice * c_ice * ΔT_ice

For water:
m_water = 80 g
c_water = 4.18 J/g°C (specific heat capacity of water)
ΔT_water = final temperature - 40°C (change in temperature)

Q_water = m_water * c_water * ΔT_water

According to the principle of conservation of energy, the heat lost by the water will be equal to the heat gained by the ice:

Q_water = -Q_ice

Now let's substitute the respective values and solve for the final temperature:

m_water * c_water * ΔT_water = -m_ice * c_ice * ΔT_ice

80 g * 4.18 J/g°C * (final temperature - 40°C) = -40 g * 2.09 J/g°C * (final temperature - 0°C)

Simplifying the equation:

334.4 * (final temperature - 40) = -83.6 * final temperature

334.4 * final temperature - 13376 = -83.6 * final temperature

334.4 * final temperature + 83.6 * final temperature = 13376

418 * final temperature = 13376

final temperature = 13376 / 418

final temperature ≈ 32°C

Therefore, the temperature of the mixture will be approximately 32°C.

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Answer:

This indicates there will be the densest (heaviest) liquid on the bottom of the jar there will be the least dense (lightest) liquid on top. Syrup, glycerin, water, oil, and then alcohol would be on top of the order of liquids from hardest to lightest.

Yes, s = u+v/2+t, where s is the displacement, u is the beginning velocity, v is the end velocity, and t is the time required, is the equation of motion for a body travelling with uniform acceleration.

The basic law of motion, which states that a body's rate of change in displacement is directly proportional to its velocity, provides the basis for this equation. The equation of motion for a body travelling with constant acceleration, s = ut + 1/2at2, may be used to derive it.

The equation of motion for a body travelling with uniform acceleration is given by replacing the value of an as (v-u)/t and getting s = u+v/2+t. This formula is only accurate when the body's acceleration is constant and uniform.

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Answer:

Explanation:

The Reaction Rate for a given chemical reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time. Let's see the following reaction:

The rate can be measured in terms of either reactant (A or B) or either product (C or D), like this:

The problem is asking for the rate of the reaction in terms of the change of nitrogen dioxide (NO2) concentration, so we can apply the formula of rate.

As NO2 are in the reactants, the rate is negative because it is consuming and the coefficient which is 14 is in the denominator:

The answer would be that the rate of NO2 concentration in the reaction is -1/14*(Δ[NO2])/Δt).

Answer: NO2

Explanation:

Assume 100 grams of a substance so that %=mass in grams

1.) Convert both into moles of each substance

30.45 g N * (1 mol N/ 14.01 g N) = 2.173 mol of N

69.55 g O * (1 mol O/ 16.00 g O) =4.347 mol of O

2.) divide both by the smallest number of moles, in this case 2.173, to find subscripts of each element.

2.173/ 2.173= 1

4.347/ 2.173= 2

Therefore the empirical formula is NO2

Answer:

The solid-liquid line in the water phase diagram has a negative slope, whereas for most other substances it has a positive slope.

The ice has a lower density as compared to water still they have in the solid phase.

In the solid-liquid line in the water phase diagram it contains the negative slope. While the most other substance should have the positive slope.

Also, when the pressure is applied so the higher density should be favored. In the water, the highest density phase should be likely the liquid water.

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The relationship between the rate of diffusion r, and d is r ∝ 1/√d.

The relationship between the rate of diffusion (r) and the density of a gas (d) can be explained using Graham's law of diffusion. According to this law, the rate of diffusion of a gas is inversely proportional to the square root of its density. Mathematically, it can be expressed as:

r ∝ 1/√d

where the symbol '∝' represents 'proportional to'. The constant of proportionality (k) can be introduced to this equation as:

r = k/√d

This equation shows that as the density of a gas increases, its rate of diffusion decreases. This is because denser gases have more molecules per unit volume and thus, they experience greater intermolecular collisions that hinder their movement. Therefore, it requires more energy for them to diffuse through a medium compared to less dense gases.

The relationship between the rate of diffusion and density is particularly important in understanding the behavior of gases in different environments. For instance, in a gas chromatography column, the rate of diffusion of a gas determines how quickly it moves through the column and separates from other components. Similarly, in the Earth's atmosphere, the rate of diffusion of greenhouse gases such as carbon dioxide affects their concentration and hence, their impact on climate change.

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We will assume that the gas behaves like an ideal gas, also that the temperature and moles of the gas are constant. Since there is only a change in volume and pressure, we can apply Boyle's law, which tells us:

Where,

P1 is the initial pressure of the gas, 675.33kPa

V1 is the initial volume of the gas, 667.984L

P2 is the final pressure of the gas, 981.94kPa

V2 is the final volume of the gas

We clear V2 and replace the known data:

Answer: The volume resulting in liters is 459.41 L

The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

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It would be more accurate to say that all stars produce some elements, but not all elements are produced by all stars. While it is true that many elements are produced by stars through the process of nuclear fusion, not all elements are created by all stars.

For example, the heaviest elements such as gold and platinum are formed through a process called neutron capture, which occurs during supernova explosions or in the collision of neutron stars.

Additionally, some stars may not be massive enough or may not live long enough to produce certain elements. Therefore, it would be more accurate to say that all stars produce some elements, but not all elements are produced by all stars.

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Answer:

the second answer its science behind it

Answer:

b

Explanation:

The structures are shown in the image attached.

A structural formula is the representation of the molecule in which all atoms and bonds in the molecule are shown.

Since the question requires that all the lone pairs, formal charges and sigma and pi bonds should be shown, then the simple condensed structural formula becomes insufficient in this case.

I have attached images of the structural formula of sodium benzoate (image 1), benzoic acid (image 2)  and tetrahydrofuran (image 3).

All the formal charges, lone pairs as well as sigma and pi bonds are fully shown.

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Answer:

b

Explanation:

the answere is b

Explanation:

The correct formula for calcium fluoride is CaF2 (with two fluoride ions per calcium ion). Therefore, 2.25 moles of CaF2 contains:

- 2.25 moles of Ca2+ ions (since there is one calcium ion for every molecule of CaF2)

- 2 x 2.25 = 4.50 moles of F- ions (since there are two fluoride ions for every molecule of CaF2)

So, in total, 2.25 moles of CaF2 contains 2.25 moles of Ca2+ ions and 4.50 moles of F- ions.

Answer:Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it to become ice (a solid)

Explanation:

Answer:

The energy in cabbage leaves comes from the light from the sun.

Explanation:

The plant keeps the light (in the leaves) as energy to help make it grow.

Answer:

The answer is Physical

Answer:

physical property

Explanation:

Answer:

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.

Explanation:

the correct order of the ionization was Cu > Ag < Au.

define ionization ?

Ionization, or Ionisation is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes. The resulting electrically charged atom or molecule is called an ion. Ionization can result from the loss of an electron after collisions with subatomic particles, collisions with other atoms, molecules and ions, or through the interaction with electromagnetic radiation. Heterolytic bond cleavage and heterolytic substitution reactions can result in the formation of ion pairs. Ionization can occur through radioactive decay by the internal conversion process, in which an excited nucleus transfers its energy to one of the inner-shell electrons causing it to be ejected.

the correct order of the ionization was Cu > Ag < Au.

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The peroxide addition would yield a product that is different from the antiperoxide addition

Markovnikov's rule states that when a protic acid HX is added to an alkene, the acid hydrogen (H) forms a bond with the carbon atom that has the greatest number of hydrogen atoms, while the halide (X) group forms a bond with the carbon atom that has the fewest hydrogen atoms.

This can be summed up with the phrases "the rich get richer" and "the poor get poorer" in terms of hydrogen. This fundamental principle of alkene chemistry aids in predicting the results of addition reactions.

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The addition of hydrochloric acid to a reaction mixture can serve several purposes, depending on the specific reaction and its conditions such as: (1) To provide protons (H⁺), (2) To adjust the pH of the reaction mixture, (3) To remove impurities or byproducts.

(1) To provide protons (H⁺) for acid-catalyzed reactions: HCl is a strong acid, meaning it readily donates protons to other molecules. In some reactions, the presence of HCl can accelerate the reaction by increasing the concentration of protons in the reaction mixture. This can facilitate bond-breaking and bond-forming steps in the reaction mechanism.

(2) To adjust the pH of the reaction mixture: In some reactions, it may be necessary to maintain a specific pH range for the reaction to proceed optimally. By adding HCl, the pH of the reaction mixture can be lowered, making the environment more acidic. Conversely, the addition of a base such as sodium hydroxide (NaOH) can raise the pH of the reaction mixture.

(3) To remove impurities or byproducts: In some reactions, the addition of HCl can help to remove impurities or byproducts that may interfere with the desired reaction. For example, HCl can be used to remove metal oxides or hydroxides from a reaction mixture.

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Answer:

C. Greater genetic variation

Answer:

Sedimentary

Explanation:

Answer:

Water sweated by water from the leaf cells evaporating into the air, which pulls water and nutrients from the leaf into the air.

The chemical element which magnesium would combine with in order to attain a subscript of 3 is nitrogen which result in the formation magnesium nitride ( Mg₃N₂ )

Magnesium is a metallic element which belongs to group 2 and and has a valence electron of 2. This means that in an electrovalent combination, magnesium loses 2 valence electrons to nitrogen to become Mg2+ ion. To complete this bonding, nitrogen which has 5 valence electrons accepts 3 of Mg2+ ions in addition with with its two N3− ions to form magnesium nitride. When this happens, magnesium then attains a subscript of 3.

Magnesium nitride is an electovalent or ionic compound and the bond which exist in it is Ionic bond. It is used in the synthesis of ceramic substances.

So therefore, we can confirm from above that when magnesium reacts with nitrogen, it attains a subscript of 3.

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Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.

Chemical elements are defined as a type of atom, including the pure substance made entirely of that type, with a specific number of protons in its nucleus.

Magnesium is a metallic element with a valence electron number of 2, and it is a member of group 2. This indicates that magnesium loses two valence electrons to nitrogen in an electrovalent combination to form the Mg2+ ion. Nitrogen, which has five valence electrons, accepts three Mg2+ ions in addition to its two N3 ions to complete this bonding and create magnesium nitride. Magnesium then achieves a subscript of 3 when this occurs.

Thus, Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.

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Answer:

7

Explanation:

N-14 has 7

i looked it up ye ur probably gonna get it right

Answer:

7 protons + 7 neutrons!

Explanation: