A 4.0 L container holds a sample of hydrogen gas at 296 K and 130 kPa.If the pressure increases to 380 kPa and the volume remains constant, what will the new temperature be?Round your answer to one decimal place.

Answer:

I did this last year I'm so glad and I'm so happy to help you so it will be digesting a salad because if you look at the human body it breaks down as it goes into your body so if you eat it it doesn't look like it changed in front of your eyes but if you don't know it or not it breaks down inside of your organs so it will be digesting a salad

Answer:

2.81 × 10⁶ mm³

2.81 × 10⁻³ m³

Explanation:

Step 1: Given data

Length (l): 250 mm

Width (w): 225 mm

Thickness (t): 50 mm

Step 2: Calculate the volume of the textbook

The book is a cuboid so we can find its volume (V) using the following expression.

V = l × w × t = 250 mm × 225 mm × 50 mm = 2.81 × 10⁶ mm³

Step 3: Convert the volume to cubic meters

We will use the relationship 1 m³ = 10⁹ mm³.

2.81 × 10⁶ mm³ × 1 m³ / 10⁹ mm³ = 2.81 × 10⁻³ m³

The energy in joules of one mole of photons of visible light having a wavelength of 4.11×10^2 nm? can be expressed as 2.9*10^5 J

From the question we were told to find the energy and the parameters that is needed to calculate these are;

c=3*10^8

h= 6.626 * 10^-34 J.s

1 mol photons = 6.023x10^23 photon

λ = 4.11×10^2 nm  = 4.11 × 10-7 meters

The parameters can be input  as Energy of one mole photon (E) = ( 6.023x10^23 * 6.626 * 10^-34 * 3*10^8)/ (4.11 × 10^-7)

=291302

=2.9*10^5 J

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Answer:

One of the major effects of heat transfer is temperature change: heating increases the temperature while cooling decreases it. We assume that there is no phase change and that no work is done on or by the system. Experiments show that the transferred heat depends on three factors—the change in temperature, the mass of the system, and the substance and phase of the substance.

Hey there!

The formula for density is d = m/v.

The mass of the sample is 56.5 g, and the volume of the sample is 5 cm³.

So, to plug these values into the equation, we have:

\(d=\frac{56.5}{5}\)

Simplified, this is:

d = 11.3

The unit for this is g/cm³, or grams per cubic centimeter.

So, the density of lead is 11.3 g/cm³.

Hope this helps!

Answer:

11.3 g/cm³

Explanation:

Density of lead

= Mass / Volume

= (56.5 g) / (5 cm³)

= 11.3 g/cm³

Answer:

The number of moles of water in 100 g of vinegar is 0.47 moles.

Explanation:

The general form of a neutralization reaction is HF + FrOH → FrF + H₂O

We refer to this as a neutralisation reaction. Only this reaction, which produces NaCl and water as products, is a neutralisation reaction since it involves HCl and NaOH. The resulting response is listed below: NaCl(aq) + H₂O = HCl(aq) + NaOH(aq) (l)

The interaction of H⁺ ions and OH⁻ ions produces water in a neutralisation reaction, which occurs when an acid and a base combine to make water and a salt. The neutralisation of a strong acid and strong base yields a pH of 7.

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Sodium carbonate, often referred to as Na2CO3, is a chemical compound composed of atoms of sodium (Na), carbon (C) and oxygen (O).

It is also sometimes called washing soda or soda ash. At room temperature, sodium carbonate is a white, crystalline solid that is very soluble in water. According to the chemical formula of the sodium carbonate molecule, Na2CO3, each molecule consists of two sodium atoms (Na), one carbon atom (C) and three oxygen atoms (O). The atomic configuration in sodium carbonate is shown in the given diagram.

A trigonal planar arrangement is formed when the central carbon atom is bonded to three oxygen atoms. The structure of sodium carbonate is completed by two sodium atoms joined to oxygen atoms.

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It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.

A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.

Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.

The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.

The strength of the bond is in the following order: H.....F > H.....O > H......N

The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.

Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.

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Answer:uses world like

Explanation:

Answer:

Decrease surface area of marble chips.

Explanation:

Because the reaction goes on the surface  of marble chips, decreasing surface area of marble chips will decrease(slow down) the rate of the reaction.

Answer:No

Explanation

The percentage by mass of water will be 6.25 %.

Mass percent would be a means to describe a component in a specific combination or to convey a concentration. The mass percentage used to describe the solution composition indicates the mass of solute contained in a given quantity of solution. The solute's concentration is specified in terms of mass or moles.

Given data:

mass of solute = 5 g

Mass of water = 75 g

Mass solution = 75 +5 = 80 g

Percent by mass can be determined by using the formula:

Percentage by mass = mass of solute / mass of solution × 100

Put the value of given data in above formula:

Percentage by mass = 5 / 75 × 100

Percentage by mass = 6.25 %.

Therefore, the percentage by mass of water will be 6.25 %.

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Answer:

b

Explanation:

cause it stops at 8 and it starts going up until it hits 14

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

Answer:

             5-bromo-2-methylheptane

Explanation:

                    Select heptane as the longest parent chain. Start numbering from methyl end because it is the smallest number as compare to 3 bromide (if started from the other end). Bromide will get 5th position. In writing the name bromo is written first due to alphabetical order.

Answer:

mm hola hablas español??????

Explanation:

Given set of elements in one column and their classification in another column.

1. Phosporus                         c.Metallic lattice

2. Bromine                           d.Covalent network.

3. Hydrogen                          b. Molecules

4. Krypton                              a. Discrete atoms

Since Krypton is an inert gas and it exists in discrete atoms.

Hydrogen exists as a diatomic gas.

Bromine exists as Br_2 liquid and is held by covalent bonds.

Phosphorus exists as P_4 molecules and it exits as a metallic lattice.

When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

Answer:

904.014 j/kgk

Explanation:

Mass of metal = 45g

Temperature of metal = 85.6°

Mass of water = 150

Temperature of water = 24.6

Final temperature of system = 28.3

Heat lost by metal = Heat gained by water

m1 * c1 * dt = m2 * c2 * dt

Q = quantity of heat

Q = m*c*dt

dt = change in temperature

dt of water = 28.3 - 24.6 = 3.7

dt of metal = 85.6 - 28.3 = 57.3

Specific heat capacity of water, c = 4200

(45 * 10^-3) * c * 57.3 = (150 * 10^-3) * 4200 * 3.7

2.5785c1 = 2331

c1 = 2331 / 2.5785

= 904.01396

= 904.014 j/kgk

The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.

An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.

However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.

Thus, the correct option is A.

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Answer:

pH = 1.85

Explanation:

The reaction of H₂NNH₂ with HNO₃ is::

H₂NNH₂ + HNO₃ → H₂NNH₃⁺ + NO₃⁻

Moles of H₂NNH₂ and HNO₃ are:

H₂NNH₂: 0.0400L ₓ (0.200mol / L) = 8.00x10⁻³ moles of H₂NNH₂

HNO₃: 0.1000L ₓ (0.100mol / L) = 0.01 moles of HNO₃

As moles of HNO₃ > moles of H₂NNH₂, all H₂NNH₂ will react producing H₂NNH₃⁺, but you will have an excess of HNO₃ (Strong acid).

Moles of HNO₃ in excess are:

0.01 mol - 8.00x10⁻³ moles = 2.00x10⁻³ moles of HNO₃ = moles of H⁺

Total volume is 100.0mL + 40.0mL = 140.0mL = 0.1400L.

Thus, [H⁺] is:

[H⁺] = 2.00x10⁻³ moles / 0.1400L = 0.0143M

As pH = - log [H⁺]

The pH of the resulting solution is 1.85.

The reaction is 1:1 hence;

Number of moles of  H₂NNH₂ = 40/1000 L × 0.200 M = 0.008 moles

Number of moles of  HNO₃ = 100/1000 L × 0.100 M = 0.01 moles of HNO3

Number of moles of excess acid = 0.01 moles - 0.008  = 0.002 moles

Total volume of solution;

40.0 mL + 100.0 mL = 140 mL or 0.14 L

Molarity of excess acid = 0.002 moles/ 0.14 L = 0.014 M

Since;

pH = -log[H^+]

pH = -log[0.014 M]

pH = 1.85

The pH of the resulting solution is 1.85.

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Answer:

In Haloarenes the C atom to which the X group is attached is SP2 hybridized thus it is become difficult to replace it by the Nucleophile. Since arenes and Vinyl halides are electron rich molecules due to presenceof n bonds, they repel Nucleophile attacking them.

Question:-

Why it is difficult for haloarenes to undergo nucleoplhilic subsituⁿ reaction?

Answer:-

Haloarenes are less reactive towards the nucleoplhilic substitution rxⁿ . This is due to following reasons :-

\(\red{\bigstar}\underline{\textsf{ Reason 1 :- Partial double bond character .}}\)

Halogen atom has one lone pair, and due to presence of π - σ - lp , resonance is established in the compound ( see attachment) . Due to resonance there is a partial double bond character in the carbon halogen bond , so it is difficult to break a double bond than a single bond.

\(\rule{200}2\)

\(\red{\bigstar}\underline{\textsf{ Reason 2 :- $\pi$ cloud .}}\)

When a nucleoplhile comes to attack , it is repelled by the π-cloud of the benzene ring.

\(\rule{200}2\)

\(\red{\bigstar}\underline{\textsf{ Reason 3 :- Phenyl cation .}}\)

If somehow the halogen atoms leaves the benzene ring ,being more electronegative than carbon , it takes away the electron , thus a positive charge is left on benzene ring and the phenyl cation so formed is very unstable .

\(\rule{200}2\)

Answer:

\(\boxed {\boxed {\sf 856.74 \ g \ C_8H _{18}}}\)

Explanation:

To convert from grams to moles, the molar mass is used. These values tells us the grams in 1 mole of a substance. They can be found on the Periodic Table (they are equivalent to the atomic masses, but the units are grams per mole).

We are given the compound C₈H₁₈. Look up the molar masses of the individual elements.

Notice there are subscripts that tell us the number of atoms of each element. We must multiply the molar masses by the subscripts.

Add these 2 values together to find the molar mass of the whole compound.

Use this number as a ratio.

\(\frac{ 114.232 \ g \ C_8H_{18}}{1 \ mol \ C_8H_{18}}\)

Multiply by the given number of moles: 7.5

\(7.5 \ mol \ C_8H_{18}*\frac{ 114.232 \ g \ C_8H_{18}}{1 \ mol \ C_8H_{18}}\)

The moles of C₈H₁₈ will cancel each other out.

\(7.5 *\frac{ 114.232 \ g \ C_8H_{18}}{1}\)

\(7.5 *{ 114.232 \ g \ C_8H_{18}}\)

\(856.74 \ g \ C_8H _{18}\)

7.5 moles of C₈H₁₈ is equal to 856.74 grams of C₈H₁₈

If dissociation of mgcl2 in water were 100%, the van`t hoff factor would be 3 (three); however, for real solutions the van`t hoff factor for mgcl2 is (greater than, less than) this value.

MgCl2 dissociates into three ions when it dissolves in water, giving it a theoretical van't Hoff factor of 3. The van't Hoff factor for MgCl2 is normally tested at a value of no more than 2.7.

The van't hoff factor for magnesium chloride is 3. The letter I stands for the Van't Hoff factor. One magnesium cation and two chloride ions make up the last three ions formed when magnesium chloride separates. Consequently, the magnesium chloride van't hoff factor is equal to 3.

A solute's impact on associated properties, such as osmotic pressure, relative vapor pressure reduction, boiling-point elevation, and freezing-point depression, is measured by the van 't Hoff factor i.

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Answer:

The Aluminium electron configuration will be 1s^22s^22p^63s^23p^1. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom. This makes it easier to understand and predict how atoms will interact to form chemical bonds.

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of rock = 14 g

volume = 2 cm³

The density of the rock is

\(density = \frac{14}{2} \\ \)

We have the final answer as

Hope this helps you

A: "Both chemical and physical weathering occur" and B: "weathering is more rapid along coastlines" describe weathering of the sea floor.

Weathering is the breaking down and alteration of rocks, soils and minerals at or near the Earth's surface, through physical and chemical processes.

Physical weathering involves mechanical processes such as freeze-thaw, abrasion and erosion, which cause rocks and soils to physically break apart into smaller pieces. While chemical weathering involves chemical reactions between the minerals in rocks and soils and the surrounding environment, altering their chemical composition and causing them to break down into new minerals.

In the sea floor, both physical and chemical weathering occur as a result of the exposure to the ocean and its many processes such as wave action, currents and temperature changes. Weathering is more rapid along coastlines due to the increased exposure to these processes and because these areas often experience more severe weather conditions than other parts of the sea floor.

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If a reaction starts with 30 grams of material, the same amount of mass 30 grams of material should be present at the end, according to the Law of Conservation of Mass.

The law of conservation of mass states that no atoms are misplaced or made in a chemical reaction. as an alternative, the atoms be a part of collectively in distinctive methods to form merchandise.

The law of conservation of mass states that during a chemical reaction mass is neither created nor destroyed. for example, the carbon atom in coal turns into carbon dioxide when it's miles burned. The carbon atom changes from a stable structure to gas but its mass does not trade.

The law of conservation of mass states that depend cannot be created or destroyed in a chemical response. for example, when wooden burns, the mass of the soot, ashes, and gases equals the unique mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

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In order to determine whether there is a significant difference between two samples, the Student's t-test examines their mean and standard deviation.

A significant t-score, also known as a t-value, denotes a difference between the groups, whereas a small t-score denotes similarity. Degrees of freedom are the values in a research that have the flexibility to change, and they are crucial for determining the significance and reliability of the null hypothesis.

This test is used when specimens from two distinct populations, species, or groupings are compared and analyzed. The independent T-test is another name for it.

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