What is the percent of hydrogen by mass in CH4O

Answer:

we have four moles in 56L of co2

There are 0.15 ml of the water contains 150 mg of Pb .

Calculation ,

Formula used :

density = mass / volume                 ( i )

Given mass of the Pb in milligram ( mg ) = 150 mg

Given mass of the Pb in gram ( g ) = 150 × \(10^{-3}\) = 0.15 gram

Given density = 1.0 g/ml

We have to find volume of water in milliliter ( ml ) .

Putting the value of mass of the Pb , lead and density in equation ( i ) we get the volume of water in milliliter ( ml ) .

density = mass / volume

1.0 g/ml  =  0.15 gram / volume

volume =  0.15 gram / 1.0 g/ml = 0.15 ml

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The half-life of 14C is currently estimated to be 5,730 years. Accordingly, just half of the original 14C will be present after 5,730 years, followed by a quarter after 11,460 years, an eighth following 17,190 years, and so forth.

The duration needed for a quantity to decrease to half of its original value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how lengthy stable atoms last. Additionally, the phrase can be used more broadly to describe any kind of exponential decay.

The basic idea behind radiocarbon dating is that all living creatures absorb carbon from their environment, including some naturally occurring radioactive carbon-14. Even though the plant or animal stops absorbing when it dies, the radioactive carbon it has stored keeps on degrading.

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The statement that adding one -OH group to four carbons makes alcohol miscible in water is false.

The miscibility of alcohols in water depends on various factors, including the size of the alkyl group and the presence of other functional groups.

Alcohols are generally miscible in water due to the presence of the hydroxyl (-OH) group, which allows them to form hydrogen bonds with water molecules. However, the miscibility of alcohols in water is not solely determined by the number of carbon atoms in the molecule.

The solubility of alcohols in water decreases as the size of the alkyl group attached to the hydroxyl group increases. Smaller alcohols, such as methanol (CH₃OH) and ethanol (C₂H₅OH), are completely miscible in water. As the alkyl group becomes larger, such as in higher molecular weight alcohols like butanol (C₄H₉OH), their solubility in water decreases.

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Moles of carbon dioxide(co2) will you make only 0.0115 mol was produced.

we know the ideal gas equation,

PV = nRT

PV/RT=n

n=(1.04 atm)(1.00 L) /L atm (0.0821 )(1100 K) mol K

n=0.0115 moles of CO2.

The moles ofCaCO3 = 50.0 g/100.09 g/mol = 0.500 mol CaCO3 .If the reaction had gone to completion, 0.500 mol of CO2 would have been produced.  The two different experiments (one with 50.0 g of CaCO3 and one with 100.0 g of CaCO3) reached the same constant, final pressure of 1.04 atm.

Since increasing the amount of reactant did not produce more product, there is no way that all of the CaCO3 reacted. Instead, an equilibrium condition has been achieved and there must be some solid CaCO3 in the container.

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Answer:

The answer is a) \(C_{4} H_{16} O_{5}\)

Explanation:

The other chemical formulas' subscripts share a common factor, so they can be simplified to an empirical formula, however, the subscripts in  \(C_{4} H_{16} O_{5}\) cannot be simplified any further, because they do not share any more whole-number factors with each other.

Answer:

wave speed

Explanation:

A wave is a disturbance that transmits energy from one place to another without the actual displacement of the particles of the medium.

To find the wave speed we need to determine the product of its frequency and wavelength.

  Wave speed  = Frequency x wavelength

Frequency of wave is the number of wave that passes through a point at a unit time.

Wavelength is the displacement of a complete wave train.

Answer:

false

Explanation:

because  i know it

Answer:

Hope this will help.......

Explanation Covalent bonds are insoluble in water (H2O) , but covalent compounds are. This is because some organic compounds (covalent) contain the polar −OH group which can bond to a hydrogen ion to form water.

Answer:

Explanation:

bye answer is I don't know lol

Answer:

A.Yes

Explanation:

Answer:

ver explicacion

Explanation:

Los iones se forman cuando las especies químicas pierden o ganan electrones.

Las sustancias iónicas consisten en un ión positivo y negativo cuyas cargas se equilibran exactamente entre sí, por lo que el compuesto iónico es neutro.

Los átomos de metal se mantienen unidos por el enlace metálico. Esto implica la interacción entre iones metálicos cargados positivamente y un mar de electrones negativos. Las cargas positivas de los iones metálicos están exactamente equilibradas por el mar de electrones cargados negativamente, por lo que el metal es neutro.

If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.

According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.

When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.

For the dominant allele, however, only one copy is needed for it to be expressed.

In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.

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The valid unit for reaction rate is D) Ms (molarity per second). This unit represents the change in concentration of a substance over time and is commonly used to measure the rate of a chemical reaction. The other options, A) mmol/ml, B) g/L, C) mol/g, and E) atmig, are not appropriate units for reaction rate.

The reaction rate is a measure of how quickly the concentration of reactants decreases or the concentration of products increases over time. It is expressed as the change in concentration per unit time.

Option D) Ms (molarity per second) is a valid unit for reaction rate. Molarity (mol/L) represents the concentration of a substance, and when divided by time (seconds), it gives the rate of change in concentration per unit time. This unit is commonly used in chemical kinetics to quantify the speed of a reaction.

Options A) mmol/ml, B) g/L, C) mol/g, and E) atmig are not appropriate units for reaction rate. These units do not represent the change in concentration per unit time, which is the essence of reaction rate. They may represent other quantities such as concentration, mass, or pressure, but they do not directly relate to the rate of a chemical reaction.

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Answer:

Explanation:

The percent yield is calculated as the ratio of the actual yield to the theoretical yield, multiplied by 100%.

Given values:

Theoretical yield = 75.0 g

Actual yield = 42.0 g

Percent yield = ?

The formula for calculating the percent yield is given by:

% yield = (Actual yield / Theoretical yield) × 100%

Substituting the given values in the above equation, we get:

% yield = (42.0 g / 75.0 g) × 100%

On solving the above equation we get,% yield = 56%

Therefore, the percent yield of the reaction is 56%.

The percentage yield of a reaction is the ratio of the actual yield to the theoretical yield, multiplied by 100%. In the given problem, the percent yield is calculated to be 56%.

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Answer:

hyposthesis

Explanation:

Balanced equation

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

Given

Reaction

Pb(NO₃)₂⇒PbO+NO₂+O₂

Required

Balanced equation

Solution

Pb(NO₃)₂⇒aPbO+bNO₂+cO₂

Pb, left=1, right=a⇒a=1

N, left=2, right=b⇒b=2

O, left=6, right=a+2b+2c⇒6=1+2.2+2c⇒6=5+2c⇒1=2c⇒c=1/2

The reaction becomes :

Pb(NO₃)₂⇒PbO+2NO₂+1/2O₂ x2

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

The chemical commonly mixed with water to clean Self-Contained Breathing Apparatus (SCBA) equipment is typically a disinfectant or cleaning solution.

There are various cleaning solutions available specifically designed for cleaning SCBA equipment. The specific chemical used may vary depending on the manufacturer or department protocols. Some common examples of cleaning agents used for SCBA cleaning include:

1. Quaternary Ammonium Compounds (Quats): Quats are a type of disinfectant that can effectively kill bacteria, viruses, and fungi. They are often used as cleaning agents for SCBA equipment due to their antimicrobial properties.

2. Hydrogen Peroxide: Hydrogen peroxide is a commonly used disinfectant and cleaning agent. It has strong oxidizing properties that can help kill bacteria and viruses on SCBA surfaces.

3. Isopropyl Alcohol: Isopropyl alcohol, also known as rubbing alcohol, is often used as a cleaning agent for SCBA equipment. It has antimicrobial properties and can help remove dirt, grime, and bacteria from surfaces.

4. Detergent Solutions: Mild detergent solutions may also be used for cleaning SCBA equipment. These solutions help remove dirt, oils, and contaminants from the surface of the equipment.

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Answer:

43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.

Explanation:

Ideal gas law is:

PV = nRT

Where P is pressure in atm

V is volume = 4.00L

n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):

500g * (1mol / 70.90g) = 7.052 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 25°C + 273 = 298K

To solve the pressure, P:

P = nRT/V

P = 7.052mol*0.082atmL/molK*298K / 4.00L

P = 43.1atm is the pressure using gas law.

Van der Waals equation is:

\(P + a(\frac{n}{V})^2 * (V-nb) = nRT\)

Where a is 6.58L²atm*mol⁻²

b = 0.056Lmol⁻²

Solving for pressure:

\(P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}\)

\(P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2\)

\(P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2\)

P = 172.323 / 3.6051 - 20.4866

P = 27.2atm using Van der Waals Law

Answer:

1.mass of Ag3PO4=4185.8g

2.mass of AgBr=6732g

The bond angle formed by an axial atom is 180 degrees and equatorial atom is 90 degrees.

Above and below the core atom are the axial atoms. These are the "pyramid points" that the molecule forms. (NOTE: Bipyramidal refers to two pyramids. The pyramids should be visible in relation to the top and bottom halves of the centre atom if you look at an image. The atoms that are located in the horizontal plane of the Centre atom are known as equatorial atoms. (Consider how close to the Earth the equator is.)

Assuming that the EX5 is made up entirely of atoms, let's continue our debate (and not lone pairs). The equatorial atoms have 120 degree binding angles with one another. The axial and equatorial atoms' bond angles are 90 degrees.

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Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of blood = 473.176 mL

density = 1.06 g/mL

The mass of the blood is

mass = 473.176 × 1.06 = 501.56656

We have the final answer as

Hope this helps you

Answer:

501.57

Explanation:

i got it right

The pOH of the solution is 0.63. the concentration of hydroxide ions in moles per liter.

To find the pOH in a 0.235 M NaOH solution, we need to use the equation :pOH = -log[OH-]where [OH-] represents the concentration of hydroxide ions in moles per liter (M).Step-by-step solution:To start, we need to determine the concentration of hydroxide ions [OH-] in the solution. The chemical formula for sodium hydroxide is NaOH. When dissolved in water, it dissociates into Na+ ions and OH- ions, as shown below: NaOH → Na+ + OH-This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M.So, [OH-] = 0.235 MNow we can use this value to calculate the pOH:pOH = -log[OH-]pOH = -log(0.235)pOH = 0.628. When rounded to two decimal places, the pOH of the solution is 0.63.So, the correct answer is option b) 0.63. We can write a 150 word answer as follows: A pH scale measures the concentration of hydrogen ions (H+) in a solution. The pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. To calculate the pOH of a 0.235 M NaOH solution, we first need to determine the concentration of hydroxide ions. When sodium hydroxide (NaOH) is dissolved in water, it dissociates into Na+ ions and OH- ions. This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M. Using the formula pOH = -log[OH-], we can find that the pOH of the solution is 0.63. This means that the concentration of hydroxide ions in the solution is 10^-0.63 M, or approximately 0.199 M.

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Geostrophic winds blow parallel to isobars from low pressure to high pressure from high pressure to low pressure perpendicular to isobars.

This means that they move along lines of equal pressure, rather than moving from areas of high pressure to areas of low pressure or vice versa. Isobars are lines or contours on a weather map that connect areas of equal atmospheric pressure. Geostrophic winds are typically found in the upper atmosphere, where the Coriolis effect is strong enough to balance out the pressure gradient force and cause the winds to move in a straight line. In the lower atmosphere, friction and other factors can cause the winds to deviate from this pattern.

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It will take 9.64 minutes to deposit 1.00g of Zn metal

Convert the mass of Zn produced into moles using the molar mass of Zn.

Molar mass of Zinc = 65.38

No of moles of Zn = 1.00 × \(\frac{1}{65.38}\) = 0.015 moles of Zinc

the half-reaction for the production of Zn at the cathode.

                            Zn²⁺ (aq) + 2 e⁻  →   Zn(s)

the moles of e⁻ required to produce the moles of Zn using the stoichiometry of the balanced half-reaction.  

According to the equation 2 moles of electrons will produce one mole of zinc.

                     0.015 × 2 mole e⁻ / 1 mole of Zn = 0.03 mol e⁻

Convert the moles of electrons into coulombs of charge using Faraday's constant.

   1 F = 96485  C

    0.03 × 1 F / 1 mole

=   0.03 × 96485 / 1

=   2894.55 C

the time using the current and the coulombs of charge.

5.00 A × t = 2894.55 C

t = 2894.55 / 5.00

t = 578.91 s

=  9.64 minutes

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The most likely explanation for what happened halfway through year 15 is D. a sharp decrease in available land.

The term "population" refers to the average number of distinct residents in a particular area or region across time. They are individuals who are part of the same class of creatures. Halfway through year 15, the amount of land available begins to rapidly decline.

Beginning above 400, the line increases above 400 and declines below 350 at year 14, increases over 400 and rises to over 400 and drops to 200 at year 16, and so on.

Due to unfavorable weather and a lack of food, the number of rabbits drastically decreases during the cold winters and scorching summers. The population grows when the conditions are good, such as in the spring and summer, and the amount of land accessible shrinks as a result. As a result, there will be a dramatic drop in the amount of land that is available.

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Sunlight, the answer is sunlight or water. I do believe its sunlight. Hope this helps.