Calculate the grams of H2O produced when 9. 75 grams of NH3 reacts with excess oxygen.



4NH3 + 5O2 → 4NO + 6H2O



Molar Masses: NH3 = 17. 031 O2 = 31. 998 NO = 30. 006 H2O= 18. 015




A 11. 9 grams



B 10. 3 grams



C 61. 9 grams



D 15. 5 grams

Liquid to gas - Boiling: The phase change from a liquid to a gas that occurs when the substance reaches its boiling point, resulting in the formation of vapor.

Solid to gas - Sublimation: The phase change from a solid directly to a gas without going through the liquid state.

Solid to liquid - Melting: The phase change from a solid to a liquid when heat is applied, causing the substance to transition from a rigid to a more fluid state.

Liquid to solid - Freezing: The phase change from a liquid to a solid when the substance loses heat, resulting in the formation of a solid crystal lattice.

Therefore, the correct match would be:

Liquid to gas - Boiling

Solid to gas - Sublimation

Solid to liquid - Melting

Liquid to solid - Freezing

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Answer:

i think 2?

Explanation:

AI2 O2

srry if wrong but

hope this helps

The volume of the titrant, or in our example, the volume of the strong base, is graphed against the pH to create the titration curve. The titration curves of weak acids with strong bases have a number of properties.

The initial pH is more or less acidic than the titration of a strong acid (before the addition of any strong base).

At the start of the titration, the pH increases significantly. This occurs as a result of the weak acid's anion changing into a common ion, which lessens the acid's ability to ionize. Following the initial, abrupt increase, the titration curve only modifies gradually. This is a result of the solution's role as a buffer.

This will carry on until the base exceeds the capacity of the buffers. Half-neutralization takes place at the center of this progressively sloping curve. The concentration of the weak acid and the concentration of its conjugate base are now equal. As a result, pH=pKa. Because only half of the acid has been neutralized, this moment is known as the half-neutralization.

Since all of the acid (HA) has been changed to its conjugate base (A-) by the injection of NaOH, the pH is greater than 7 at this time. As the equilibrium shifts back towards HA, hydroxide is produced, which is represented by the formula: A+H2OAH+OH (2)Prior to the equivalence point, the curve has a brief steep section. It typically doesn't start until a pH of about 10.

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1. decantation

2. 2O₂

3. intensive

4. Pure Substance

5. 15O₂

6. homogenous

7. Solubility

8. mixture

9. extensive

10. distillation

Answer:

i think c

Explanation:

Answer:

Average atomic mass  = 32 amu

Explanation:

Given data:

Abundance of X-30.00 amu = 30%

Abundance of X-32.00 amu = 50%

Abundance of X-35.00 amu = 20%

Average atomic mass = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  +(abundance of 3rd isotope × its atomic mass)  / 100

Average atomic mass  = (30×30)+(50×32)+(20×35) /100

Average atomic mass =  900 + 1600 +700 / 100

Average atomic mass = 3200 / 100

Average atomic mass  = 32 amu.

Answer:

Explanation:

Equilibrium is achieved in a chemical reaction when there is a steady state with no change in concentrations.

So the answer is "When the concentrations of reactants and products are constant."

The amount of shared electrons is equivalent to twice as many bonds as there are in the structure. The phrase "is the correct assertion" indicates how an atom in a Lewis structure is given a formal charge.

The electron is a subatomic particle with an initial electric charge that is negatively one. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles. A nucleus and one or more electrons attached to the nucleus make up every atom. One or more protons and many neutrons make up the nucleus. Neutrons are only absent from the most prevalent kind of hydrogen. Neutral or ionized atoms make up every solid, liquid, and form of plasma.

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The value of Ea′ is -53 kJ/mol, and it represents the energy released during the chemical reaction.

The given values ∆E = −33 kJ/mol and Ea = 20 kJ/mol represent the activation energy and the change in energy, respectively, for a chemical reaction. The activation energy, Ea, is the minimum energy required for the reaction to occur, while the change in energy, ∆E, represents the difference between the energy of the reactants and the energy of the products.

The relationship between the activation energy, Ea, and the change in energy, ∆E, can be expressed using the equation: ∆E = Ea + Ea′ where Ea′ represents the energy released during the reaction. Since the change in energy and the activation energy are given, we can rearrange the equation to solve for Ea′: Ea′ = ∆E - Ea

Substituting the given values, we get: Ea′ = −33 kJ/mol - 20 kJ/mol = -53 kJ/mol. Therefore, the value of Ea′ is -53 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases energy as it proceeds. The magnitude of the value (-53 kJ/mol) indicates that the energy released during the reaction is significant.

In summary, the value of Ea′ is -53 kJ/mol, and it represents the energy released during the chemical reaction. This value can be calculated using the equation Ea′ = ∆E - Ea, where ∆E is the change in energy and Ea is the activation energy.

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Answer:

Both the Earth and Venus show the appearance of igneous rocks due to the cooling of the magma.

Explanation:

As we know, ignea rock is the first step in the transformation of rocks. This rock is formed by the overflow of terrestrial magma which, upon cooling, turns into ignea rock, which will undergo metamorphism and transform into metamorphic rock, which will continue to undergo metamorphosis until it becomes the other rocks that complete the rock cycle. This is a terrestrial process that can be found on Venus, which also presents the cooling of magma in the formation of ignea rock, which will undergo metamorphism, transforming into other rocks, the way it occurs on Earth.

At the time of death, the creature contained 5 g of carbon-14.

Although the nucleus of carbon-14 is unstable due to the two extra neutrons, the substance is still carbon because it has six protons. Carbon-14 transforms one of its neutrons into a proton by releasing a negatively charged particle from its nuclei in order to attain a more stable state.

In this case, N-14 is the daughter isotope and C-14 is the parent isotope.

in present time the fossil contain, amount of parent isotope is = 1.25 gm

amount of daughter isotope = 3.75 gm .

As we amount of C-14 is constant until the death of organism or body . After the death of plants or animals C-14 starts decay in to N-14 .

so at initial time or at the time of decay , the amount of C-14 was = 1.25 gm + 3.75 gm = 5 gm .

so answer is 5 gm.

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Answer:

The element you would have is Carbon-14.

Explanation:

Carbon-14 has 6 protons and 8 neutrons. To find the atomic mass, you add the protons to the neutrons, so the atomic mass of Carbon-14 is 14.

#teamtrees #WAP (Water And Plant)

First, we'll look at the ideal gas equation,

PV = nRT

The temperature and pressure are said to be constant; Additionally, R is a constant already. Along these lines, we get:

V = constant * n

The direct proportional equation is as follows: As a result, we get:

V/n = constant

V₁/n₁ = V₂/n₂

Replace V₂ with the qualities and address.

V₂ = (4 * 1.48) / 0.864

V₂ = 6.85

In the end, 6.85 Liters of gas must be present, so we must add:

6.85 - 4 = 2.85 liters

The volume of a gas is directly proportional to its mole volume at a fixed temperature and pressure.

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Q- At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure if you need a total of 1.48mol of oxygen gas in the vessel?

The pressure of the gas when the volume is 1.76 L and the temperature is 308 K is approximately 1.77 atm using the combined gas laws.

To calculate the pressure of an ideal gas using the combined gas law, we can use the formula:

P1 * V1 / T1 = P2 * V2 / T2

Where:

P1 = Initial pressure of the gas (1.02 atm)

V1 = Initial volume of the gas (2.32 L)

T1 = Initial temperature of the gas (285 K)

P2 = Final pressure of the gas (to be determined)

V2 = Final volume of the gas (1.76 L)

T2 = Final temperature of the gas (308 K)

Plugging in the values:

(1.02 atm) * (2.32 L) / (285 K) = P2 * (1.76 L) / (308 K)

Now, solve for P2:

P2 = (1.02 atm) * (2.32 L) * (308 K) / (1.76 L) / (285 K)

= 1.77 atm

Therefore, the pressure of the gas when the volume is 1.76 L and the temperature is 308 K is approximately 1.77 atm.

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The lowest temperature at which the oil gives off a vapor which can be readily ignited is the flash point. Option D is correct.

The flash point of an oil or any other flammable liquid is the lowest temperature at which it gives off vapors that can ignite when exposed to an ignition source, such as a spark or a flame. It is the temperature at which the liquid produces enough vapor to form an ignitable mixture with air, but not necessarily sustain combustion.

The flash point is an important parameter in determining the flammability and safety of a liquid, as it indicates the temperature at which it can present a fire hazard. Once the flash point is reached, the liquid can release vapors that can ignite and result in a fire or explosion.

Hence, D. is the correct option.

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Answer: The nebular theory is an explanation for the formation of solar systems.

Explanation:

Answer:

ipotseeeeeeeeeeeeeeee

Answer:

hydrogen

Explanation:

its the only one that doesn't say incorrect answer

The following is an example of a subatomic particle is hydrogen. Hence option D is correct.

Subatomic particle is defined as any of the different self-contained particles of matter or energy that make up the building blocks of all matter. Protons, neutrons, and electrons are the three subatomic particles that make up a normal atom. The neutron is the subatomic particle with the most mass.

The chemical element hydrogen is represented by the letter H and atomic number 1. Three subatomic particles make up a hydrogen atom. They include the heavier constituents of the small but extremely dense atom's nucleus, the positively charged protons and the electrically neutral neutrons, as well as the electrons, the negatively charged, nearly massless particles that still make up the majority of the atom's size.

Thus, the following is an example of a subatomic particle is hydrogen. Hence option D is correct.

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Answer:

Cell expansion and an increase in turgor pressure is due to inward diffusion of water into the cell, and turgor pressure increases due to the increasing volume of vacuolar sap. A growing root cell's turgor pressure can be up to 0.6 MPa, which is over three times that of a car tire.

Explanation...read that and you will have a sucess

Answer:

the force that you applied caused the notebook to move.the force applied on the notebook by the table causes it to stop moving. this is because after sometime the book uses up the force and later the force you applied is less than that of the force by the table.

The Curiosity rover found that ancient Mars had the right chemistry to support living microbes.

These are organisms which can be seen with microscope and not with the nak ed eyes.

Curiosity rover was sent to mars to study life forms in which it was discovered that they were present.

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Answer:

Explanation:

Hope it helps you :)

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Answer:

X = electrons from hydrogen

O (black) = electrons from oxygen

O (red) = electrons from when it was connected to a metal atom, hence why it has a negative charge

Answer:

Explanation:

The circulatory system is made up of blood vessels that carry blood away from and towards the heart The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.....etc

The most important thing in the circulatory system is The heart.

It pumps blood around the body. It sits inside the chest, in front of the lungs, and slightly to the left side. The heart is a double pump made up of four chambers, with the flow of blood going in one direction due to the presence of the heart valves.

The chief function of the circulatory system is,

Oxygen and Carbon Dioxide Transport.

(Circulates OXYGEN and removes Carbon Dioxide)

Other functions of the circulatory system are:

Nutrient and Waste Product Transport.

Disease Protection and Healing.

Hormone Delivery.

Body Temperature Regulation.

Answer:

1120 mm Hg

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Generating I2 in situ, or on-site, has several advantages over purchasing and using pre-made iodine solutions. First, it is more cost-effective as it eliminates the need for expensive and hazardous iodine solutions.

It is more convenient as it can be prepared on-site as needed, rather than having to store and transport large quantities of iodine solutions.

Using bleach as an oxidizing agent to generate I2 in situ has additional advantages. Bleach is a readily available and inexpensive oxidizing agent, making it a more practical choice for smaller-scale reactions. Bleach also produces a lower concentration of iodine compared to more powerful oxidizing agents such as potassium permanganate or hydrogen peroxide, which can be advantageous in some reactions where a lower concentration of iodine is desired.

Furthermore, bleach is less hazardous and less reactive than other oxidizing agents, reducing the risk of accidents and making it safer to handle. This is especially important in laboratory settings where safety is a top priority.

Overall, generating I2 in situ using bleach as an oxidizing agent has several advantages including cost-effectiveness, convenience, and safety.

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The statement "you're letting the cold in" is technically false. When you open a door on a cold winter night, you are allowing the warm air inside to escape, which can cause a drop in temperature. However, you are not necessarily "letting the cold in." The cold air is already present outside, and it will continue to exist whether the door is open or closed. In fact, the temperature inside your home may only change slightly, and it will depend on many factors such as the size of the room, the amount of insulation, and the efficiency of the heating system.

The concept of heat transfer, which is the movement of heat from one place to another, helps explain why this statement is false. When you open the door, the warm air inside will move to the cold air outside, which is known as conduction. This transfer of heat will cause the temperature inside to drop until the heat source can warm up the air again. This process will continue as long as the door remains open. So, while opening the door on a cold winter night can cause a drop in temperature, it is not because you are "letting the cold in." Instead, it is because you are allowing the warm air inside to escape.