Ammonia, NH3, is used to as fertilizer and as a refrigerant. What is the new pressure if 25.0 g of ammonia with a volume of 350 mL at 1.50 atm is expanded to 8.50 L at constant temperature

Answer:

oK so pay pattention to the fractions

Explanation:

A balanced chemical equation for the combustion of gaseous methanol is:2CH3OH (g) + 3O2 (g) → 2CO2 (g) + 4H2O(g).

Bond energy in C-H bonds is equal to 413 kJ/mol. Bond energy in O-H bonds is equal to 463 kJ/mol.Let us use Hess’s Law for the calculation of enthalpy of reaction.

The enthalpy of combustion of methanol can be given as follows: H = [2 × BE(C=O)] + [4 × BE(O-H)] - [2 × BE(C-H)] - [3 × BE(O=O)]Here, BE stands for bond energy. H = [2 × 799 kJ/mol] + [4 × 463 kJ/mol] - [2 × 413 kJ/mol] - [3 × 498 kJ/mol]H = -726 kJ/mol Thus, the enthalpy of combustion of methanol is -726 kJ/mol.

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Answer:

C

Explanation:

Answer: Your answer is a Sea breeze

A sea breeze, much like the majority of weather conditions experienced at the coast, is the result of the contrasting way in which the land and ocean react to changes in temperature

Hope this helps!

Answer:

A sea breeze,

Explanation:

also known as an onshore breeze, occurs because of the differences in air pressure created by the difference in temperature between the ocean or water and the dry land.

Answer:

Calcium atom has two valency electrons in its outermost energy level and these participate in bonding with the two of the six valency electrons in the outermost energy level of oxygen atom.

Calcium loses these two electrons and it gains a charge of +2 while Oxygen atom gains these two electrons and gains a charge of -2 hence gains stability

\(Ca {}^{2 + } \: \: and \: \: O {}^{2 - } \)

As a result, Calcium oxide is formed due to ionic or electro valent bonding.

\(CaO\)

Answer:

hiii

Explanation:

200ml of MgO require 0.5m/L of mass.

You must dissolve 40.00 g of sodium hydroxide pellets in 250 ml of distilled water to create 1MMgO  solution, and you must then dilute the solution to 1 litre. You can make 1M MgO  solution by weighing 19.95 g of MgO  pellets and dissolving them in 500 ml of distilled water.

Thus, we can state that 200 ml of a 0.400M solution has 3.2 g of MgO . Solvent and solute are combined to form a solution. The solute is the substance that is present in solution in a smaller amount, while the solvent is the is quite strongly present.

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Answer:

The speed of sound in air is 333.33 m/s

Explanation:

The parameters given are the time it takes for the sound to male it to the cliff and back = 30 times in 9 seconds

Distance to the cliff = 50 meters

Therefore, the sound covers a distance of 30 × 100 = 3000 meters in 9 seconds

Which give the speed of sound in air using the formula for speed = Distance/Time

Therefore, the speed of sound in air = 3000/9 = 333.33 m/s.

Answer:

A single bond between two atoms corresponds to the sharing of one pair of electrons. Two hydrogen atoms can then form a molecule, held together by the shaped pair of electrons. Each H atom now has the Noble gas electron configuration of helium ( He). The pair of shared electrons forms a single covalent bond.

Answer:

the chemical composition of a substance.

Explanation:

A heating curve illustrates the changes in the temperature and physical state of a substance as it is heated (Option D).

The changes in the temperature and physical state shows how the substance absorbs heat and undergoes changes in its physical state, such as melting or boiling, as its temperature increases. It does not illustrate chemical changes that may occur. It also indicates phase transitions, such as melting and boiling points, where the substance changes its physical state.

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Answer:

1.11×10²⁴

Explanation:

To convert mol to molecules

Multiply the number of moles to 6.02×10²³

1.85×6.02×10²³ = 1.11×10²⁴

The molar mass of ethanol is 46.069 g/mol because it has 2 mol of carbon atoms (2 12.011 g), 6 mol of hydrogen atoms (6 1.0079 g), and 1 mol of oxygen atoms (1 15.9994 g) in 1 mol.

Ethanol has a molar mass of 46 gmol-1.

Because you already know, molar mass refers to the entire mass of one molecule of a certain substance, and the basic chemical formula of ethanol is C2H5OH. So, if there are numerous atoms in a compound, we may calculate its molar mass by adding up the masses of its constituent atoms and multiplying the result by the number of atoms. We may calculate the molar mass of ethanol as 2x(molar mass of carbon) + 6x(molar mass of hydrogen) + 1x(molar mass of oxygen), or 2x12 + 6x1 + 1x16 = 24 + 16 + 6 = 46, since ethanol contains two carbon atoms, six hydrogen atoms, and one oxygen atom.

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The molarity of the bromide ion, Br¯ in the solution is 0.3 M

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Molarity = mole / Volume

Molarity of zinc bromide = 0.0225 / 0.15

Molarity of zinc bromide = 0.15 M

Dissociation equation

ZnBr₂(aq) -> Zn²⁺(aq) + 2Br¯(aq)

From the balanced equation above,

1 mole of ZnBr₂ contains 2 moles of Br¯

Therefore,

0.15 M ZnBr₂ will contain = 0.15 × 2 = 0.3 M Br¯

Thus, the molarity of bromide ion, Br¯ in the solution is 0.3 M

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NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate.

The balanced equation for the reaction of NaHCO3(s) with HC2H3O2(aq) including phase symbols is

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

Baking soda, also known as sodium bicarbonate, is a white, crystalline powder with the chemical formula NaHCO3. It is an alkaline substance that neutralizes acids.

Vinegar is mostly composed of acetic acid, HC2H3O2, which is a weak acid. Vinegar has a sour flavor and a strong smell due to the presence of acetic acid.

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)  This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate. When the baking soda and vinegar are combined, a chemical reaction occurs, causing carbon dioxide gas bubbles to form. This is due to the reaction between the acid and base in the mixture, which generates carbon dioxide gas as a byproduct. This reaction is commonly used in baking as a leavening agent to make cakes, muffins, and other baked goods rise.

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The advantages of water as a liquid medium are : Water remains liquid at the higher temperature than other substances.

Water molecules have the charge separation that allows the formation of the chemical bonds which can not be form by the other substances.

Water is the only one substances that will floats when frozen.

Water is the unique substance which is formed by the two molecules of the hydrogen and the one molecule of the  oxygen. The water is found in the different forms on the earth, like as ocean river etc.

The major part of the water is found in the liquid medium at the earth's temperature.

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According to the question the pressure inside the piston chamber is 2414.29 kPa.

Pressure is a measure of the force applied to a given area. It is usually expressed in terms of force per unit area such as pascals (Pa). Pressure is an important concept in physics and is used to describe a variety of phenomena in many areas of science. Pressure is most commonly used to describe the force applied by a gas or liquid on an object. The greater the pressure, the stronger the force. It can also be used to describe forces that are applied to a surface by a solid object. Pressure can be measured with a variety of instruments such as manometers, barometers, and pressure gauges.

The equation for Boyle's Law is P1V1=P2V2, where P1 is the original pressure, V1 is the original volume, P2 is the new pressure, and V2 is the new volume. Using this equation, we can calculate the new pressure, P2, as follows:

P2 = (P1V1)/V2

P2 = (425kPa * 2.00L) / 0.35L

P2 = 2414.29kPa

Therefore, the pressure inside the piston chamber is 2414.29kPa.

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Replacing a C-Cl bond with a C-H bond reduces the atmospheric lifetime of a CFC because C-H bonds are more reactive than C-Cl bonds, leading to faster degradation of the compound.

Replacing a C-Cl bond with a C-H bond in CFCs reduces their atmospheric lifetime. C-Cl bonds are highly stable and unreactive, allowing CFCs to persist in the atmosphere for a long time. However, C-H bonds are weaker and more reactive. In the presence of sunlight and atmospheric radicals, C-H bonds undergo photochemical reactions, breaking down the molecule. These reactions lead to the degradation of the compound into less stable and more water-soluble substances. The increased reactivity of C-H bonds results in a shorter atmospheric lifetime for the compound. This shorter lifetime is beneficial as it limits the compound's ability to reach the stratosphere and cause ozone layer damage. Replacing C-Cl bonds with C-H bonds enhances the compound's susceptibility to degradation, contributing to environmental protection.

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increase in bandgap of annealed TiO2 compared to as-deposited TiO2 indicates changes in electronic structure,optical properties. Alteration affect material's light absorption, transparency, photocatalytic behavior.

The increase in bandgap observed in the annealed TiO2 compared to the as-deposited TiO2 indicates a change in the electronic structure and optical properties of the material.  it is important to note that the bandgap represents the energy difference between the valence band (where electrons are bound) and the conduction band (where electrons are free to move and contribute to electrical conductivity). An increase in the bandgap indicates that more energy is required to excite electrons from the valence band to the conduction band.

When TiO2 is annealed at higher temperatures, the crystal structure and arrangement of atoms undergo changes. This results in modifications to the electronic band structure. Specifically, annealing at higher temperatures promotes the reorganization of atoms and the reduction of defects or impurities in the TiO2 lattice. The increase in bandgap implies that the annealed TiO2 has a higher energy threshold for electron excitation. This suggests that the material has a wider range of light absorption, particularly in the ultraviolet (UV) region. The increased bandgap leads to a shift towards higher energy (shorter wavelength) absorption, which corresponds to a decrease in the material's transparency in the UV range.

Furthermore, the increase in bandgap affects the photocatalytic properties of TiO2. TiO2 is widely used as a photocatalyst for various applications, such as water splitting and pollutant degradation. A larger bandgap means that TiO2 requires higher-energy photons (typically UV light) to initiate photocatalytic reactions. Therefore, the annealed TiO2 with an increased bandgap may exhibit reduced photocatalytic activity compared to the as-deposited TiO2. In summary, the increase in bandgap of the annealed TiO2 compared to the as-deposited TiO2 indicates changes in the electronic structure and optical properties. This alteration can affect the material's light absorption, transparency, and photocatalytic behavior.

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Answer:

k=2, L=8, M=7

Explanation:

because k shell have maximum electron number of 2 ,L shell and M shell have 8 and 18 respectively.

Answer:

526.85K

Explanation:

Based on Charles's law, the volume of a gas is directly proportional to absolute temperature. The formrula is:

V₁ / T₁ = V₂ / T₂

Where 1 represents the initial state and 2 the final state of the gas

Using the values of the problem:

V₁ = 10.0L

T₁ = 127°C + 273.15K = 400.15K

V₂ = 20.0L

Thus, replacing in the formula:

10.0L / 400.15K = 20.0L / T₂

T₂ = 800K

In Celsius:

800K - 273.15 = 526.85K

Answer: Burrowing animals can cause weathering. By digging for food or creating a hole to live, in the animal may break apart rock. The large roots of this tree can break apart rock. This is mechanical weathering.

Explanation:

Answer:

Look at the explanation below.

Explanation:

Animals can help weathering occur in various ways, such as digging a hole or breaking a rock. If the rock slightly breaks and has cracks, water can fill the cracks and start weathering.

Answer: 3.55g Na2SO4

Explanation:

we need to find how many moles of Na2SO4 we have:

0.250Lx0.10M= 0.025 moles of Na2SO4

now multiply that by the molar mass of Na2SO4 (142.04g/mol)

0.025mol x 142.04g/mol = 3.55g Na2SO4

Answer:

a: iron is a substance

Explanation:

because its hard and brittle and classified as a metal

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:15.9994 g/mol

Explanation:

Answer:

i think it is..... smaller than normal range of highs and low tides  

Moon and Sun are at right angles to the Earth

Explanation:

Moon and Sun are at right angles to the Earth and gravity of the Sun and Moon work against is the right statement about NEAP tides.

Tides are the cyclic deformation of water body occur due to external gravitational force.

NEAP tides are also known as small tides as their heights are not very much and this is occur due to opposite attraction of water towards the gravity of the sun and moon. As sun and moon are present in the right angle direction with respect to the earth.

Hence, option (1) & (2) is correct, i.e. gravity of sun and moon is opposite and they are present at the right angle to the earth.

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Answer:

50 Points Help 1) Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL.  

7) What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm3.

Answer:

At 13.6 C, a 1.2 mole sample of a gas exerts a pressure of 2.4 atmospheres. 1 point If you were solving for volume, what number would you use for temperature in the ideal gas law equation (PV = nRT)? о O 13.6 o 1.2 0 24 O 286.6 0 275.4

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There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the  nature of radioactive decay does not support the given statement.

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle. Decay of radioactive element always comes under first order kinetics.

The rate law for first order kinetics is

K=(2.303/T)×log(a/a-x)

half life=0.693/K

Where

k - rate constant

t - time passed by the sample

a - initial amount of the reactant

a-x - amount left after the decay process

Consistency and predictability are imperatives to the experience of a safe environment.  The nature of radioactive decay does not support this.

Therefore, the  nature of radioactive decay does not support the given statement.

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Yes, I am agree with the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula:

CuxCly • zH2O

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