The equation for the formation of water from hydrogen gas and oxygen gas is 2H2+O2→2H2O.

How many grams of water can be made from 160 g of oxygen gas?



160 g

180 g

320 g

405 g

It is discovered that lead has a specific heat of 0.0011 J/C.

The heat capacity of a substance is a measurement of how much heat is needed to elevate body temperature by one degree Celsius.

Heat change is provided by,

Q = mcT

Where,

Did the temperature change?

The heat capacity of the is c.

The body's mass is m,

T stands for temperature change.

Lead weighs 1343 grams, and its temperature and heat change by 29.8 degrees Celsius and 45J, respectively.

Assigning values,

c = 45/(29.8x1343) (29.8x1343)

Per degree Celsius, c equals 0.0011 Joules.

the specific heat is 0.0011 J/C as a result.

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Answer:

\(\huge\boxed{\sf P =624.678 \ kPa}\)

Explanation:

Given:

Volume = v = 4.34 L

Temp = T = 1.0 °C = 1 + 273 = 274 K

Moles = n = 1.19 mol

Gas constant = R = 0.08206 L atm K⁻¹ mol ⁻¹

Required:

Pressure = P = ?

Formula:

Pv = nRT

Solution:

Rearranging formula

\(\displaystyle P = \frac{nRT}{v} \\\\P = \frac{(1.19)(0.08206)(274)}{4.34} \\\\P = \frac{26.8}{4.34} \\\\P = 6.17 atm\\\\\underline{In \ kPa:}\\\\P =624.678 \ kPa\\\\\rule[225]{225}{2}\)

Answer:

Membrane

Explanation:

Unlike a bacteria , an animal cell contains membrane which bounds organelles.

The reaction that destroys ozone in the stratosphere is \(3Cl_2 + 2O_3 --- > 6ClO\)

The ozone layer is a stratospheric layer that shields the planet from harmful radiations coming from the sun. A type of UV radiation known as UVB is known to cause harmful effects on plants and animals, including humans.

The ozone layer is destroyed by halogen-based pollutants such as chlorofluorocarbon (CFC). When these pollutants are exposed to intense UV radiation at the stratospheric layer, they release halogens.

For example, CFC releases chlorine when exposed to intense UV radiation.  Chlorine molecules are capable of reacting with ozone to form chlorine monoxide (ClO) according to the following equation:

\(3Cl_2 + 2O_3 --- > 6ClO\)

Thus, the stratospheric ozone layer is gradually removed by chlorine.

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Answer:

See the answer below

Explanation:

The statement that could best explain how the offspring could inherit a trait not shown in the phenotypes of either parent would be that both parents are heterozygous for the red color.

Heterozygous parents can produce offspring with a phenotype that is distinctly different from that of either parent if the recessive alleles come together during random fusion of gametes.

Let us assume that the red color (R) in the New Hampshire chicken is the dominant one and the recessive one is the golden color (r). The genotype of the heterozygous parents would be Rr.

        Rr    x    Rr

     RR   Rr   Rr   rr

There is a probability (1/4) of producing a golden color chicken (rr), a trait that is not displayed in either of the parents.

Given that the initial pressure of the ideal gas is 9.6 bar and the final pressure is 2.5 bar. Also, given that the constant volume heat capacity of the gas is 10.571 J/mol/K and the initial temperature is 415 K. We are to determine the final temperature of the gas.

Expansion of an ideal gas is an adiabatic process. We can determine the final temperature using the formula:T₁/T₂ = (P₁/P₂)^((γ-1)/γ)where,T₁ = Initial temperatureT₂ = Final temperatureP₁ = Initial pressureP₂ = Final pressureγ = Ratio of specific heatsWe know that the ratio of specific heat, γ for a monoatomic gas (like helium, argon, neon) is 5/3. Here, we will assume that the given ideal gas is monoatomic.Thus, we have:T₁/T₂ = (P₁/P₂)^((γ-1)/γ)⇒ T₁/T₂ = (9.6/2.5)^((5/3 - 1)/(5/3))⇒ T₂ = T₁ / (9.6/2.5)^((5/3 - 1)/(5/3))We substitute the given values,

we get:T₂ = 415 / (9.6/2.5)^((5/3 - 1)/(5/3))≈ 225.2KThus, the final temperature of the gas is 225.2 K (rounded to one decimal place). the final temperature of the gas which is 225.2 K. The is based on the formula of the adiabatic process which is T₁/T₂ = (P₁/P₂)^((γ-1)/γ)

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Answer:

Sometimes peoples like to say that atom is like a cell in living things,is it true?comment below,letss goo!!

Explanation:

A greek philosopher known as Democritus was the first to consider the idea that matter is made up of small particles ,about 400BC.

Since there was no experimental evidence to support his idea,it was not accepted.

About 2000 years later an English man called John Dalton revived the discussion.He used experimental evidence to support his idea to convince people that matter is made up of particles called atoms.It accepted!.

An English man called John Dalton revived the discussion.He used experimental evidence to support his idea to convince people that matter is made up of particles called atoms.It was accepted ,he conclude the following theories:

A) The pH of a 0.75 M acetic acid solution, CH3COOH, Ka = 1.8 x 10⁻⁵: The pH is 2.92.

B) The calculated pH of a 0.75 M diethylamine solution, (CH3CH2)2NH, Kb = 7.1 x 10⁻⁴: The pH is 13.71

C) The hydronium ion concentrations can be represented as [H3O+]. the ratio of the hydronium ion concentrations in each solution is 1.59 x 10⁻¹¹.

A) The pH of a 0.75 M acetic acid solution, CH3COOH, Ka = 1.8 x 10⁻⁵: Firstly, we have the formula for Ka:

Ka = ([H3O+][CH3COO-]) / [CH3COOH]

We need to calculate [H3O+] and [CH3COO-].

Let us represent [H3O+] as x and [CH3COO-] as y.

Let [CH3COOH] be

0.75-x: [H3O+][CH3COO-] / [CH3COOH] = 1.8 x 10⁻⁵x

y / (0.75-x) = 1.8 x 10⁻⁵

x = [H3O+]

pH = - log[H3O+]

pH = - log (1.21 x 10⁻³)

The pH is 2.92.

B) The calculated pH of a 0.75 M diethylamine solution, (CH3CH2)2NH, Kb = 7.1 x 10⁻⁴:Given that Kb = 7.1 x 10⁻⁴.We know that

pKb + pKa = pKw (at 25°C)

Now, we have pKa, which is equal to -log Ka. Let us calculate pKa:

pKa = - log(1.8 x 10⁻⁵)

pKa = 4.74

pKw = 14

pKb = pKw - pKa = 14 - 4.74 = 9.26

Let us now use the formula for Kb:

Kb = [BH⁺][OH⁻] / [B]

Kb = [CH3CH2NH3⁺][OH⁻] / [CH3CH2NH2]

Let us represent [CH3CH2NH3⁺] as x and [OH⁻] as y.

Let [CH3CH2NH2] be 0.75-x.

Therefore, we have:

[CH3CH2NH3⁺][OH⁻] / [CH3CH2NH2] = 7.1 x 10⁻⁴x

y / (0.75-x) = 7.1 x 10⁻⁴

y = [OH⁻]

pOH = -log [OH⁻]

pOH = -log (3.53 x 10⁻³)

The pOH is 2.45.Using the formula

pH + pOH = pKw:

2.92 + 2.45 = 14 - pH + pOH2.

92 + 2.45 = 14 - pH + 11.559.37 - 11.55 = pH

pH = - log(1.93 x 10⁻¹⁴)

The pH is 13.71

C) The hydronium ion concentrations can be represented as [H3O+]. In a 0.75 M acetic acid solution:

[H3O+] = 1.21 x 10⁻³

In a 0.75 M diethylamine solution:

[H3O+] = 1.93 x 10⁻¹⁴

The ratio of the hydronium ion concentrations in each solution is:

1.93 x 10⁻¹⁴ / 1.21 x 10⁻³ = 1.59 x 10⁻¹¹.

Therefore, the ratio of the hydronium ion concentrations in each solution is 1.59 x 10⁻¹¹.

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Answer:

The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle. These three cycles working in balance are responsible for carrying away waste materials and replenishing the ecosystem with the nutrients necessary to sustain life.

Explanation:

:)

Answer:

Oil prices would decrease, and availability would increase

Explanation:

Answer:

Yes

Explanation:

Some environmental factors- chemical, physical (UV), and biological (poisonous plants)- have the capability to damage DNA. This can lead to mutation, cell death, and several ailments.

Chemicals such as pesticides and heavy metals can be found in the environment (air, water) or in some consumer products.

The presence of Lead and a reactive oxygen species can result in DNA damage. Arsenic is classified as a carcinogen (cancer-causing substance).

More details are found in scientific articles online, but here's a helpful snippet- "heavy metal exposure can contribute to genetic damage by inducing double strand breaks (DSBs) as well as inhibiting critical proteins from different DNA repair pathways"

Lead and arsenic are heavy metals that are considered carcinogens. These metals cause alteration and damage to the genetic material and protein synthesis.

Carcinogens are said to be a substance that can lead to cancer in an organism and are produced naturally from viruses and ultraviolet rays or mna made by cigarette smoking and chemicals.

Their high exposure causes the breaking of the double strand of the DNA molecule in the cells that inhibits and prevents protein formation leading to interference with the DNA repair pathways.

Cadmium, lead, arsenic, etc., are heavy metals that are released by human activities and alter the genetic mechanism and composition leading to mutation and disorders like skin cancers, lung cancer, etc.

Therefore, lead and arsenic is carcinogens that damage DNA.

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Answer:

C    shake it repeatedly

Explanation:

i think thats the answer if not sorry hope it helps you.

Answer:

C.

Explanation:

Answer:

due to the overlaying layers of strata (layers of earth) an high pressure is created at the core. due to this it behaves like an solid rether than being a liquid... the lower mantle is not solid because in this case the overlaying strata doesn't produce that much pressure on it..

Explanation:

brainliest plz

Answer:

The moles of gas is 0.009474 moles.

Explanation:

Given that,

Volume = 526 mL

Pressure = 346 mmHg

Temperature = 35.0°C

We need to calculate the moles of gas

Using formula of ideal gas

\(n=\dfrac{PV}{RT}\)

Where, P = pressure

V = volume

R = gas constant

T = temperature

Put the value into the formula

\(n=\dfrac{\dfrac{346}{760}\times0.526}{0.08206\times(35+273)}\)

\(n=0.009474\ moles\)

Hence, The moles of gas is 0.009474 moles.

Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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Answer:

Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.

Molecules that are too large to flow across the membrane need help from integral proteins.

Some molecules are too large to diffuse through the membrane channels and too lipid insoluble to diffuse through the phospholipid layer.

Such is the case with glucose and some other monosaccharides,these substances, however, can cross the plasma membrane through the facilitated diffusion process.

The transport of these molecules depends on integral membrane proteins that act as transporters, transferring the molecules to one side of the membrane and the other without coming into contact with its hydrophobic interior.

Intrinsic or integral proteins constitute more than 70% of the total and are totally or partially included within the lipid matrix of the membrane maintained by hydrophobic interactions.

When they are arranged along the membrane, they are called transmembrane, they can pass totally or partially through the bilayer, sticking out one or both of its surfaces.

There are pores and channels in the membrane to pass substances to the interior and exterior of the cells formed by transmembrane proteins.

The passage of ions through ion channels is faster than through "carrier" proteins, since it does not require the union of the ion with the pore protein.

Therefore, we can conclude that molecules that are too large to flow across the membrane need help from integral proteins.

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Answer:

Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.

Explanation:plz markk as brainliest

The Ka of The pH of the resulting solution is 2.76 when 0.325 mol of the weak acid hx is dissolved in 2.00 l of water solution is 2.76 x \(10^{-3}\)

The Ka of the weak acid HX can be calculated using the following equation: Ka = [H+]2 / [HX]. Since the pH of the resultant solution is 2.76, [H+] = 10-2.76 = 0.00712. We can also calculate [HX] using the concentration of the initial acid, which was 0.325 mol.

Since the volume of the solution is 2.00 L, [HX] = 0.325 mol / 2.00 L = 0.1625 M. Substituting these values into the Ka equation gives us Ka = 0.007122 / 0.1625, which equals  2.76 x \(10^{-3}\)

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False. Rather than lactic acid, glucose is changed to pyruvic acid during glycolysis.

A 2-keto derivative of a propionic acid, pyruvic acid is the 2-oxo monocarboxylic acid. It is a byproduct of the glycolytic process. It functions as a cofactor and a fundamental metabolite. It is similar to the propionic acid in terms of function. It is a pyruvate's conjugate acid.

The simplest -ketoacid, pyruvic acid, is essential for sugar metabolism. It is the end result of the anaerobic breakdown of glucose during glycolysis. During exercise, it is converted to lactic acid in the muscle.

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Strong bases are bases which completely dissociate in water into the cation and OH- (hydroxide ion). The hydroxides of the Group I (alkali metals) and Group II (alkaline earth) metals usually are considered to be strong bases. These are classic Arrhenius bases. Here is a list of the most common strong bases.

LiOH - lithium hydroxide

NaOH - sodium hydroxide

KOH - potassium hydroxide

RbOH - rubidium hydroxide

CsOH - cesium hydroxide

*Ca(OH)2 - calcium hydroxide

*Sr(OH)2 - strontium hydroxide

*Ba(OH)2 - barium hydroxide

A strong base has been indicated with the ability to be a good conductor of electricity. Hence, option B is correct.

Bases are defined as compounds that have the ability to form the release of the negative ions or the hydroxide ions in the solution. The acids release hydrogen or proton, thereby bases tend to have the ability to neutralize acids.

The pH has been the measure of the solution to be able to accept or donate the protons and electrons. The pH has been measured on a scale of 1-14 with the acids having a pH of less than 7, and the pH of bases tends to move towards 14. 7 is the neutral pH.

The strong bases form the dissociation of the ions in the solution more readily, and ions contribute as the medium, thereby forming the conduction of the electricity. Hence, option B is correct.

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The physical change is a modification in the structure of the chemical substance. Teeth tearing off a bite of a taco represents a physical change. Thus, option B is correct.

A physical change is an alteration in the structure of the chemical involved in the substance. In a physical change, the composition of the chemical remains intact and does not change. It includes changes in texture, temperature, shape, and phase of matter.

The processes like dissolving, boiling, cutting, melting, bending, and freezing are said to be physical changes. The teeth-bitting tacos result in smaller bites is a physical change as there is a change in the shape and size but not the composition.

Therefore, option B. the teeth tearing tacos is an example of physical change.

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Answer:

See answer below

Explanation:

I have to answer this question in english because is the rule here. I hope you can understand this.

Now, in order to answer this, is really easy. We already have the quantity of SO₂ in the air of a city. This concentration is 14 mg/m³, so we want to know the quantity in 1 L. This quantity can be expressed in mass.

If concentration according to the units is: mg/m³ This means that we have units of mass and volume. So, in order to know the quantity of SO₂ in mass, we need to convert the units of volume m³ to liter.

1 m³ is covered in 1000 L, therefore:

14 mg/m³ * 1 m³/1000 L = 0.014 mg/L

Then, the mass will be:

m = 0.014 mg/L * 1 L

m = 0.014 mg of SO₂

This is the quantity of SO₂ in 1 L.

Therefore, +17 + (-10) = +7 is the effective nuclear charge. Simply counting the number of electrons in the outer shell—without applying any charges—will get the same result. That would be the 3s2 3p5 for Cl, where 2 + 5 = 7.

Use the formula Zeff = Z - S, where Z is the atomic number and S is the number of shielding electrons, to calculate the effective nuclear charge of an atom. By deducting the number of valence electrons from the total number of electrons in the atom or ion, one can calculate the number of shielding electrons. Effective nuclear charge (Zeff) is an atom's net positive charge that attracts an electron. The closest estimate of this net charge is. Effective nuclear charge (Zeff) is calculated as Z minus Zcore.

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The most likely atomic bonding type in a polyethylene polymer is covalent bonding.Covalent bonds involve the sharing of electrons between atoms, resulting in strong bonds that hold the polymer chains together.

Polyethylene is a polymer composed of repeating units called monomers. In the case of polyethylene, the monomer is ethylene (C2H4), which consists of two carbon atoms and four hydrogen atoms.

The carbon atoms in ethylene form a covalent bond by sharing electrons. Each carbon atom has four valence electrons, and it shares one electron with the other carbon atom, forming a double bond. This double bond results in the carbon atoms being connected by a strong covalent bond.

The remaining valence electrons of carbon and hydrogen atoms form single covalent bonds to fulfill their electron requirements. Each carbon atom forms single covalent bonds with three hydrogen atoms, and the remaining valence electrons on the carbon atom form a bond with the other carbon atom.

Overall, the covalent bonding between carbon and hydrogen atoms in ethylene, and subsequently in the polyethylene polymer, is what holds the polymer chains together.

Based on the structure and bonding in ethylene and polyethylene, it can be concluded that the most likely atomic bonding type in a polyethylene polymer is covalent bonding. Covalent bonds involve the sharing of electrons between atoms, resulting in strong bonds that hold the polymer chains together.

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The correct reactant ratio for the reaction 2Fe + 3Cl2 → 2FeCl3 is 2 moles of iron (Fe) for every 3 moles of chlorine (Cl2).

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Answer:

The correct answer is -

Prokaryotic unicellular -

Eubacteria - is the domain of unicellular organisms that has a prokaryotic cell

Archaebacteria - is one of the two domains of the prokaryotic organisms that are unicellular.

Eukaryotic multicellular (autotroph) -

Plantae - is the multicellular kingdom of the eukaryotic cells and as they produce their own food by photosynthesis called autotrophs.

protists - the autotrophic protists that are multicellular comes under algae, especially red algae.

Eukaryotic multicellular (heterotroph) -

Animalia - The Animalia kingdom is the kingdom of the heterotrophic eukaryotic organism that mostly has multicellular bodies. They depend on plants or other animals for their food.

Fungi - are mostly heterotrophic eukaryotic as they get their nutrient from other organisms are mostly multicellular.

Protist - some protists are heterotrophic as well.

Eukaryotic multicellular/unicellular (heterotroph/autotroph) -

Plantae

protists

Animalia

Fungi

Answer:

Explanation:

Here, we want to select an option that represents a chemical property of carbon

Let us take a look at the options;

a) This is a physical property that talks about the color of the gas at a certain temperature

b) This is a physical property that talks about the smell of the gas at a certain temperature

c) This is a physical property that talks about the weight in comparison to the same weight of air at that particular temperature

d) This is a chemical reaction as an entirely new substance will be formed