Give the Lewis dot structure for CH3O

it is b forces hold matter together

A force is a push or pull on an object. Forces usually cannot be seen but their effects can. Nothing moves, changes speed, stops or changes direction without force. Heavier objects need more force to get them to move or change direction.

Answer:

Yup, it's B. Forces hold matter together.

Explanation:

The other user is correct. :)

Answer:

Sodium (Na) has more protons than carbon (C).

hope that helps!

The below equation shows only the ions that are directly involved in the reaction and ignores the spectator ions (K+ and NO3-) that do not participate in the reaction.

The correct answer is a. Sr(NO3)2(aq) + K2SO4(aq) → SrSO4(s) + 2 KNO3(aq). This is because in aqueous solution, Sr(NO3)2 and K2SO4 dissociate into their respective ions: Sr2+, 2 NO3-, 2 K+, and SO42-. When mixed together, the Sr2+ and SO42- ions combine to form a solid precipitate of SrSO4, while the remaining ions (2 K+ and 2 NO3-) remain in solution. The net ionic equation for this reaction is:
Sr2+(aq) + SO42-(aq) → SrSO4(s)

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The reactants for the chemical equation SnO₂ + H₂ → Sn + H₂O are SnO₂ (tin(IV) oxide) and H₂ (hydrogen gas).

A reactant is a substance or chemical species that participates in a chemical reaction and undergoes a chemical change.

In a chemical equation, reactants are typically listed on the left side of the arrow, indicating the substances that react to form the products on the right side.

In the given chemical equation, SnO₂ represents tin(IV) oxide, which consists of one tin atom (Sn) bonded to two oxygen atoms (O). The formula is SnO₂.

H₂ represents hydrogen gas, which consists of two hydrogen atoms bonded together. The formula is H₂.

Therefore, the reactants  are SnO₂ (tin(IV) oxide) and H₂ (hydrogen gas).

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Answer:

Provide more strength

Explanation:

Rust is metal that has been oxidised . Oxides are usually more fragile and porous than their crystals metal equivalents. Some oxides, such as Aluminum oxide, are useful because they have a thin, strong shell that protects the metal from further corrosion.

the answer is D. The rain cycle says that Evaporation turns water into gas

Answer:

8. the formula of the products are CO2(g) , H2O (l) and NaCl (aq)

Explanation:

s- solid

g- gas

l- liquid

aq- aqueous, means acid

These are the products of the equation, you can balance this by searching up a video on how to do so, or use a balance equations calculator online. Balancing is very easy tho.

Answer:

The ocean is made up of salt water, which is a combination of fresh water, plus minerals collectively called "salts." These salts aren't just sodium and chloride (the elements that make up our table salt), but other minerals such as calcium, magnesium, and potassium, among others.

Explanation:The answer is since particles can be found in ocean water It is a compound, since it results from the combination of elements It is a solution

The equilibrium constant has been the ratio of the product and the reactant concentration raised to the stoichiometric coefficient. The equilibrium concentration of methane is 0.059 M.

The equilibrium can be defined as the condition in which the rate of formation of product and the rate of breakdown of product is equal.

The given reaction has been:

\(\rm CO+3\;H_2\;\leftrightharpoons\;CH_4+H_2O\)

The equilibrium constant (kc) for the reaction has been given as :

\(k_c=\rm \dfrac{[CH_4][H_2O]}{[CO][H_2]^3}\)

Substituting the values of the equilibrium concentration in the equation as:

\(k_c=\dfrac{[\text C\text H_4][0.020]}{[0.30][0.10]^3} \\\\3.90=\dfrac{[\text C\text H_4]\;\times\;0.020}{0.0003} \\\\\rm CH_4=0.059\;M\)

The equilibrium concentration of methane is 0.059 M. Thus, option C is correct.

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Answer:

Sugar dissolves in water because energy is given off when the slightly polar sucrose molecules form intermolecular bonds with the polar water molecules. The weak bonds that form between the solute and the solvent compensate for the energy needed to disrupt the structure of both the pure solute and the solvent.

Owing to the fact that ethanol has a lower heat capacity than water then it certainly absorbs less energy than water.

The term heat capacity refers to the quantity of heat that can be required to raise the temperature of a substance by 1 K. We must note that the higher the heat capacity of a substance, the higher the quantity of heat that is required to raise the temperature of the substance by 1K.

Now, since ethanol has a lower heat capacity than water then it certainly absorbs less energy than water.

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The present worth equivalent of these 8 cash flows is $713,196. The present worth equivalent of the 8 cash flows can be calculated by finding the present value of each individual cash flow and summing them up. The cash flows consist of an initial investment of $225,000 in year 1, followed by a gradient series of $90,000 in years 2, 3, and 4, and then a decreasing gradient series of $120,000 in years 5, 6, 7, and 8.

To calculate the present worth, we can use the formula for the present value of a cash flow:

PV = CF / (1 + r)^n

where PV is the present value, CF is the cash flow, r is the interest rate, and n is the time period.

Let's calculate the present worth of each cash flow:

PV1 = $225,000 / (1 + 0.09)^1 = $206,422.01814

PV2 = $90,000 / (1 + 0.09)^2 = $75,402.64076

PV3 = $90,000 / (1 + 0.09)^3 = $68,834.46298

PV4 = $90,000 / (1 + 0.09)^4 = $63,271.72223

PV5 = $120,000 / (1 + 0.09)^5 = $84,600.08664

PV6 = $120,000 / (1 + 0.09)^6 = $77,747.47778

PV7 = $120,000 / (1 + 0.09)^7 = $71,394.17768

PV8 = $120,000 / (1 + 0.09)^8 = $65,522.39315

Now, let's sum up the present values to find the present worth:

Present Worth = PV1 + PV2 + PV3 + PV4 + PV5 + PV6 + PV7 + PV8

             = $206,422.01814 + $75,402.64076 + $68,834.46298 + $63,271.72223 + $84,600.08664 + $77,747.47778 + $71,394.17768 + $65,522.39315

             = $713,195.97936

Therefore, the present worth equivalent of these 8 cash flows is $713,196.

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the present worth equivalent of these 8 cash flows is $1,477,041.

The present worth equivalent of the 8 cash flows can be calculated using the concept of present value. We need to discount each cash flow to its present value using the interest rate of 9% per year.

In year 1, the cash flow is $225,000. To calculate its present value, we divide it by (1 + interest rate)^1, which is (1 + 0.09)^1, resulting in a present value of $206,422.

In years 2, 3, and 4, the cash flow increases by $90,000 each year. To calculate their present values, we divide them by (1 + interest rate)^2, (1 + interest rate)^3, and (1 + interest rate)^4, respectively. The present values for these cash flows are $166,201, $129,402, and $100,888.

In years 5, 6, 7, and 8, the cash flow decreases by $120,000 each year. To calculate their present values, we divide them by (1 + interest rate)^5, (1 + interest rate)^6, (1 + interest rate)^7, and (1 + interest rate)^8, respectively. The present values for these cash flows are $314,027, $281,376, $252,586, and $227,139.

Finally, we add up all the present values to get the present worth equivalent of the 8 cash flows: $206,422 + $166,201 + $129,402 + $100,888 + $314,027 + $281,376 + $252,586 + $227,139 = $1,477,041.

Therefore, the present worth equivalent of these 8 cash flows is $1,477,041.

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Answer:

molecules gain energ and start to move quickly

Water has highest density at 4∘C. This changes its properties from other simple fluids. When water is heated from 0∘C to 4∘C, the volume of liquid decreases. Thus for this transition, P ΔV is negative.

we can conclude that the scale is precise but not accurate. The correct option is d.This means that the scale consistently gives the same measurements, but they are not accurate or close to the true value.

To understand whether the scale is precise, accurate, both, or neither, we need to define these terms. Precision refers to the consistency or reproducibility of measurements, while accuracy refers to how close the measured value is to the true or accepted value. In this case, the true value is 1.000g, and the measurements captured are 0.843 g, 0.842 g, and 0.843 g.Looking at these measurements, we can see that they are not accurate since none of them are close to 1.000g. However, we can also see that they are precise since they are all very similar to each other, with a difference of only 0.001g between the highest and lowest measurement.
Therefore, To improve accuracy, the scale may need to be recalibrated or replaced.

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complete question: Testing precision and accuracy of scale, weigh block exactly 1.000g. these are measurements captured:

a. 0.843 g

b. 0.842 g

c. 0.843 g

d. Is the scale precise, accurate, both, or neither?

Using Boyle's law, As pressure is decreased, the volume will increase.

Boyle's Law describes how pressure and volume relate when the temperature is constant.

P1V1 = P2V2

When temperature is kept constant in this equation, pressure and volume have an inverse relationship.

When the volume is reduced, molecules have less room to move and collide more frequently, which raises the pressure. If the volume is increased, the molecules have more room to move, collisions occur less frequently, and the pressure is reduced.

The combined gas law, however, governs the connection between the three quantities when temperature is included.

As the gas volume decreases, the molecules hit the walls more frequently, raising the pressure; conversely, as the volume grows, the molecules must travel farther to contact the walls, reducing the frequency with which they do so and raising the pressure.

According to Boyle's law, a gas's pressure tends to decrease as its volume rises.

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Answer:

A I think

Explanation:

im not sure so do with that what you will

Diatomic elements are written with a subscript of 2 when they exist as a pure diatomic molecule in nature.

Diatomic elements are elements that exist in nature as two atoms of the same element bonded together. These elements include hydrogen (H₂), nitrogen (N₂), oxygen (O₂), fluorine (F₂), chlorine (Cl₂), bromine (Br₂), and iodine (I₂). Diatomic molecules are important in chemistry because they represent the simplest possible form of a covalent bond. They have an even number of electrons in their bonding molecular orbital, which makes them stable and nonpolar.

When diatomic elements are written in a chemical equation, they are written with a subscript of 2. This is because the chemical formula for a diatomic molecule consists of two atoms of the same element. For example, the chemical formula for hydrogen gas is H₂, and the chemical formula for oxygen gas is O₂. This notation helps to distinguish between elements that exist as single atoms (such as helium, He) and elements that exist as diatomic molecules (such as hydrogen, H₂).

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The student failed to rinse a wet burette with a small amount of base before starting a titration. The student would need more titrant (base) to neutralize the acid than if they had rinsed the burette before starting the titration.

The reason for this is that when a wet burette is not rinsed with the titrant, the remaining water in the burette can dilute the titrant, thereby decreasing its concentration. If the titrant is diluted, more of it would be required to neutralize the same amount of acid. This would result in a titration that requires more titrant (base) to neutralize the acid than if the burette had been properly rinsed with the base.
In other words, not rinsing the burette with a small amount of base can affect the accuracy of the titration results. It is, therefore, important to properly rinse the burette with the titrant before starting a titration to avoid diluting the titrant and ensure accurate titration results.
In conclusion, more titrant (base) would be required to neutralize the acid if a wet burette is not rinsed with a small amount of base before starting a titration. It is essential to rinse the burette before starting a titration to avoid dilution of the titrant and ensure accurate titration results.

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The student isolated approximately 172.1 micrograms of lawsone from Henna.

Based on the given information, the student observed an absorbance of 2 points at a specific wavelength (600 nm) for a solution of lawsone that he isolated from Henna. To calculate the amount of lawsone isolated, we need to use the Beer-Lambert Law which states that the absorbance of a sample is directly proportional to the concentration of the absorbing species and the path length of the sample. We know the molar extinction coefficient at the given wavelength is 20,000 M^-1cm^-1 and the path length is 1 cm.

Therefore, using the formula A = εlc, we can rearrange it to find the concentration (c) of the solution:

c = A/(εl)

c = 2/(20,000 x 1)

c = 0.0001 M

Now, we can use the molar mass of lawsone (172.14 g/mol) to calculate the amount of lawsone isolated:

0.0001 M x 10 mL x 0.1 L/mL x 172.14 g/mol = 0.1721 mg or 172.1 micrograms

Thus, the student isolated approximately 172.1 micrograms of lawsone from Henna.

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Answer:

I think I know what you're supposed to do here. You're supposed to fill out the blanks using at least one given answer. For example, on number 15, you should be able to find out the ions and the formula using the names of the substances. On number one, you should be able to figure out the formula and the names using the ions given.

Explanation:

Given above.

Answer:

1.  Recognizing a problem.

2. Drawing inferences.

3. Testing a hypothesis.

Explanation:

First you need to find a problem, make an inference or a guess, and then you can test your hypothesis.

I hope it helps! Have a great day!

Answer:

0.8833 mole of C3H8

Explanation:

Given:

Mass of C₃H₈ (Propane) = 38.95 gram

Computation:

Molar mass of C = 12.01

Molar mass of H = 1.008

Molar mass of C₃H₈ (Propane) = 3(12.01) + 8(1.008)

Molar mass of C₃H₈ (Propane) = 36.03 + 8.064

Molar mass of C₃H₈ (Propane) = 44.094

Number of mol in 38.95 gram Propane = Mass / Molar mass

Number of mol in 38.95 gram Propane = 38.95 / 44.094

Number of mol in 38.95 gram Propane = 0.88334

Answer:

Use the Periodic Table to find molar masses.

Propane (C3H8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below:

C3H8 + 5O2 → 3CO2 + 4H2O

If a propane heater burns 38.95 g C3H8, it consumes

38.95 mol C3H8.

0.8830 mol C3H8.

1 mol C3H8.

44.10 mol C3H8.

Part 2

How many moles of oxygen are required to produce 37.15 g CO2?

37.15 g CO2 = 1.407 mol O2

Part 3

What mass of propane is necessary to react with the amount of oxygen calculated in the previous question?

12.41   g C3H8    

El genotipo es el conjunto de información genética en un organismo, y se encuentra codificado en el ADN en su secuencia de bases. Dicha información se expresa mediante síntesis de proteínas.

1.  Los genes son unidades de herencia​ pues almacenan la información genética. El conjunto de genes de una especie se denomina genoma. Cada gen ocupa en el cromosoma una determinada posición, denominada locus. Para cada locus hay dos tipos o formas de genes, llamados alelos. Los mismos pueden ser iguales (siendo el organismo homocigota para ese locus) o distintos (heterocigota). Entonces, la respuesta es "b: Verdadero"

2. Los alelos dominantes, se representan con letras mayúsculas mientras que los alelos recesivos se representan con letras minúsculas. Ejemplo, el alelo que codifica para el color de ojos marrones puede ser dominante (se puede representar con la letra A, por ejemplo), mientras que el alelo que codifica para ojos verdes puede ser recesivo (a). Un individuo cuyo genotipo es Aa, tendrá ojos marrones ya que el alelo dominante enmascara los efectos del alelo recesivo. Un individuo AA también tendrá ojos marrones pues es el único alelo presente. Sin embargo, un individuo aa tendrá ojos verdes ya que tiene ambos alelos recesivos que se expresan. Entonces, la respuesta es "a: Falso"

3. Un cuadro de Punnett es un diagrama utilizado para determinar la probabilidad de obtener descendencia con un determinado fenotipo (características visibles) y genotipo (conjunto de genes). Permite utilizar genotipos maternos y paternos con sus alelos dominantes y recesivos , para cruzarlos y realizar el análisis. Entonces, la respuesta es "b: Verdadero"

4. Mendel realizó un experimento para estudiar los genes de la planta de guisantes. Cruzó una plantas de dos variedades distintas (gigantes y enanas), espolvoreando el polen de una sobre el pistilo de otra. Observó que en la primera generación de descendencia, habían todas plantas gigantes y no de tamaño "intermedio" Luego de esto, entendió que había una característica dominante para el tamaño gigante de una planta, y una recesivo para el tamaño enano. Pero previamente a todo esto, no conocía la dominancia ni el genotipo de los progenitores. Entonces, la respuesta es "a: Falso"

5. Una mutación es una alteración azarosa o por acción de un mutágeno en el ADN, ya sea en su secuencia de bases o en su organización. Esto hace que se produzca una variación en las características del organismo, que puede o no transmitirse a una descendencia. Una mutación genética hereditaria ocurre en las gametas femeninas (óvulo) y/o masculinas (espermatozoide). Cuando ocurre la fertilización, se crea un cigoto que dará lugar a un nuevo organismo que portará la mutación. Entonces, la respuesta es "b: Verdadero"

1. Cruce entre Aa x Aa

siendo A: verde, a: rojo

Cada genotipo, en este caso ambos Aa, representa los genes de un organismo. Sin embargo, en el cuadro de Punnett, se utilizan las gametas producidas por los mismos organismos. Cada gameta solo posee un alelo de cada gen, ya que son haploides. Entonces los organismos con genotipo Aa, pueden producir gametas A o a. (Ver archivo adjunto)

Como se puede ver en el cuadro, hay un 25% de probabilidades de obtener descendencia con genotipo AA (verde), 25% para aa (rojo) y 50% para Aa (verde). Lo mismo se puede expresar como 2:1:1 (de un total de 4, 2 son Aa, 1 es AA y 1 es aa). Recordando que el alelo A es dominante sobre a, la frecuencia fenotípica será de 75% verde y 25% rojo, lo que se puede expresar como 3:1 (de un total de 4, 3 son verdes y 1 es rojo).

Para concluir, recordemos que los genes codifican para las características visibles (fenotipo), y el conjunto de genes forma el genotipo. Para cada gen, hay dos alelos que ocupan un determinado locus o posición en el cromosoma y los mismos pueden ser dominantes o recesivos. Para estudiar esto, se pueden utilizar cuadros de Punnett en donde se cruzan organismos maternos y paternos, conociendo sus genes para así determinar el posible genotipo y fenotipo de la descendencia que puedan tener. Aunque hay que considerar que puede ocurrir una mutación en sus gametas, que se herede y afecte los genes y las características visibles.

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So,

There's an equation that we could use in order to find frequency, and it is the next one:

This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.

In this problem, we know the value of E and the value of h, so we need to solve for v:

Therefore, the correct answer option is A.

Answer:

The reason might be that the material that the fridge is made out of is not magnetic, meaning that it's not attracted to metal.

Answer:

Galaxy ?

Explanation:

Answer:

Other:Si and Ge

Explanation:

The sawtooth pattern observed in the two-year chart of carbon dioxide measurements from Mauna Loa, Hawaii, is a result of seasonal variations and human activities.

Carbon dioxide levels increase during the winter months when plants are dormant and decrease during the summer months when they are actively photosynthesizing. Additionally, human activities such as burning fossil fuels and deforestation contribute to the overall increase in carbon dioxide levels. The sawtooth pattern provides valuable data for scientists studying the impacts of climate change and global warming. It also serves as a reminder of the urgent need to reduce carbon emissions and adopt sustainable practices to mitigate the effects of climate change.

The sawtooth pattern observed in the two-year chart of carbon dioxide (CO2) measurements from Mauna Loa, Hawaii, is primarily due to seasonal fluctuations in plant growth and decay. During spring and summer, increased photosynthesis in the Northern Hemisphere absorbs CO2 from the atmosphere, causing a decrease in CO2 levels. Conversely, during fall and winter, reduced photosynthesis and increased plant decay release CO2 back into the atmosphere, resulting in a rise in CO2 levels. This cyclical pattern creates the sawtooth appearance on the chart, while the overall trend still shows a continuous increase in atmospheric CO2 levels due to human activities.

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Number of Silver atoms : N = 7.8 x 10²² atoms

Given

mass of bracelet : 13.94 g

Required

Number of atoms

Solution

Assuming the bracelet consists entirely of silver

mol of silver :

= mass : molar mass

= 13.94 g : 107,8682 g/mol

= 0.129

Number of atoms :

N = n x No(No = Avogadro's number)

N = 0.129 x 6.02 x 10²³

N = 7.8 x 10²² atoms

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

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Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.