A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule would take in three dimensions.

Answer:

characteristic of a good claim:

1. written in complete sentences

2. one sentence

3. answers one question

4. is stated as a fact

5. doesn't attempt to explain the claim

not a characteristic of a good claim:

1. multiple sentences

2. does not contain punctuation

3. answers multiple questions

4. starts with "i think"

5. attempts to explain the claim

6. uses weak words like "probably"

Explanation:

it is what it is

Homogeneous are hard to seperate but heterogeneous are easy to seperate.

Every day, humans employ heterogeneous mixes that can be found all around them. Particles in heterogeneous mixtures can be recognized after mixing and still maintain their chemical characteristics. Filtration and chemical processes can be used to separate the components of heterogeneous mixes.

All substances exist in one state of matter, which is a homogenous mixture. Solids can combine uniformly with other solids, liquids can combine with other liquids, and so on.

On the other hand, a heterogeneous mixture (derived from the Greek word "hetero" for dissimilar) has a non-uniform composition, which means that different parts may contain more or less of a given component. A heterogeneous mixture allows for the simultaneous existence of solid, liquid, and gas phases as well as other states of matter.

To learn more about

heterogeneous mixture refer

https://brainly.com/question/24898889?

#SPJ13

Answer:

Explanation:

To be accurate, it must be able to make measurements that are close to the actual value.

Answer:

Answer: To be accurate, it must be able to make measurements that are close to the actual value.

Explanation:

The solubility of mercury(II) iodide (HgI₂) in pure water is determined by its Ksp value, which is 2.9 x 10⁻²⁹.

In a 3.0 M solution of NaI, assuming (HgI₄)₂₋is the only significant species, the solubility of HgI₂can be calculated using the Ksp and K values.

The solubility of HgI2 in pure water can be calculated using its solubility product constant (Ksp). The Ksp value for HgI₂ is given as 2.9 x 10⁻²⁹. Solubility product constant represents the equilibrium constant for the dissolution of a sparingly soluble salt. By solving the equilibrium expression for HgI₂, we can determine its solubility in pure water.

In a 3.0 M solution of NaI, assuming the formation of (HgI₄)₂₋ is the only significant Hg-containing species, the solubility of HgI2 can be calculated using the Ksp and K values. The K value given for(HgI₄)₂₋ - is 6.8 x 10²⁹. By setting up an equilibrium expression considering the dissociation of HgI₂ into (HgI₄)₂₋  ions, we can determine the solubility of HgI₂in the presence of the NaI solution.

These calculations involve using the principles of equilibrium and the relationship between concentrations of dissolved species and their equilibrium constants. Solubility is defined as the maximum amount of solute that can be dissolved in a given solvent under specific conditions. By applying the relevant equilibrium expressions and values, we can determine the solubility of HgI₂ in each situation.

Learn more about: Solubility

brainly.com/question/31493083

#SPJ11

It is included in it's purpose or function that it will move the components at different speeds. The dyes which cover slowly. ... if two substances have similar chemical or physical properties they will behave the same as they travel through the medium and thus will not be separated.

Explanation:

HOPE ITS HELP

AND MARK ME AS BRAINLIST PLEASE ;)

The problem is the relationship between speed and surface area

As they are moving with same speed they would have same surface area also same physical and chemical properties

This can't be separated by chromatography

The formula for the time (t) it will take for perfume molecules to diffuse a distance (l) into the room can be derived as follows: t = (l^2) / (6D), where D is the diffusion coefficient.

Diffusion is the process by which molecules spread out from an area of high concentration to an area of low concentration. In this case, we are considering the diffusion of perfume molecules into the room. To derive a formula for the time it takes for diffusion to occur, we need to consider the factors that affect the rate of diffusion.

The time it takes for molecules to diffuse a distance (l) can be related to the diffusion coefficient (D), which is a measure of how quickly molecules move and spread out. The formula for the time (t) can be derived using the equation t = (l^2) / (6D), where (l^2) represents the squared distance traveled and 6D represents the diffusion coefficient.

The diffusion coefficient depends on various factors, including the mass (m) and collision cross-section (σ) of the perfume molecules, as well as the pressure (p) and temperature (t) of the environment. By assuming that the mass and collision cross-section of the perfume molecules are similar to air molecules, we can consider them to be constant in the formula.

It's important to note that this derived formula is a simplification and assumes ideal conditions. Real-world diffusion processes may involve additional factors and complexities. However, the derived formula provides a starting point for understanding the relationship between diffusion time, distance, and the diffusion coefficient.

Learn more about Molecules

brainly.com/question/32298217

brainly.com/question/30465503

#SPJ11

Answer:

12.70

Explanation:

Answer:

no.

Explanation:

ANSWER

EXPLANATION

Given that

The number of moles lithium bromide is 5.5 moles

Firstly, write a balanced equation for the reaction

Find the number of moles of bromine using stoichiometry ratio

Let x represents the number of bromine

Answer:

The flow of thermal energy in a system, at constant atmospheric pressure AND at thermodynamic standard temperature and pressure.

Answer: B) the forces in the solid hold the atoms tightly in place

Explanation:This is because there is no room for the atoms to move around much and because they are very close together which makes the phase a solid.

Answer:

The chemical equation Be₂C + 2H₂O → 2CH₄ + 2Be(OH)₂ is now balanced, with an equal number of atoms on both sides of the equation.

Explanation:

To balance the chemical equation Be₂C + H₂O → CH₄ + Be(OH)₂, we need to make sure that the number of atoms of each element is the same on both sides of the equation.

Let's start by balancing the carbon (C) atoms. There are two carbon atoms on the left side (in Be₂C) and one carbon atom on the right side (in CH₄). To balance the carbons, we can put a coefficient of 2 in front of CH₂:

Be₂C + H₂O → 2CH₄ + Be(OH)₂

Next, let's balance the hydrogen (H) atoms. There are four hydrogen atoms on the right side (in 2CH₄) and two hydrogen atoms on the left side (in H₂O). To balance the hydrogens, we can put a coefficient of 2 in front of H₂O:

Be₂C + 2H₂O → 2CH₄ + Be(OH)₋₂

Now, let's balance the beryllium (Be) atoms. There are two beryllium atoms on the left side (in Be₂C) and one beryllium atom on the right side (in Be(OH)₂). To balance the berylliums, we can put a coefficient of 2 in front of Be(OH)₂:

Be₂C + 2H₂O → 2CH₄ + 2Be(OH)₂

Finally, check if the equation is balanced. Counting the atoms, we have:Be:

2 on both sides

C: 2 on both sides

H: 4 on both sides

O: 4 on both sides

The chemical equation Be₂C + 2H₂O → 2CH₄ + 2Be(OH)₂ is now balanced, with an equal number of atoms on both sides of the equation.

Learn more about balanced equation here, https://brainly.com/question/28307173

#SPJ11

d) The concentration of carbonic acid will increase if the pressure of carbon dioxide is increased in the container.

According to Le Chatelier's principle, if the pressure of carbon dioxide is increased in the container, the system will shift in a direction that reduces the pressure. In this case, it means the equilibrium will shift towards the formation of more carbonic acid. The increase in pressure will cause more CO₂ molecules to dissolve in water, leading to an increase in the concentration of carbonic acid.

The reaction CO₂ + H₂O ⇌ H₂CO₃ is an equilibrium reaction, and changing the pressure affects the equilibrium position. By increasing the pressure of CO₂, the equilibrium will favor the formation of more carbonic acid to alleviate the increased pressure. Therefore, the concentration of carbonic acid will increase as a result of the increased CO₂ pressure. The other options (a, b, c, e) are not accurate as they do not take into account the impact of the increased CO₂ pressure on the equilibrium.

To learn more about equilibrium concentration, here

https://brainly.com/question/16645766

#SPJ4

Answer:

metal - metal

metal - metal

metal - polyatomic

metal - polyatomic

metal - nonmetal

metal - nonmetal

Answer:

We all know that the characteristics are proven, not just an opinion, because they meet the correct standards. The four inner planets are formed of rock and metal and have shorter orbits, slower rotation, and no rings. The four outer planets have longer orbits and spins, as well as a composition of gases and liquids, as well as a large number of moons and rings. The outer planets are known as gas giants because they are comprised of hydrogen and helium.

Answer: For fun FLVS

Explanation:

Answer:

La configuración de estado fundamental del oro es [Xe]5d106s1 La diferencia de nivel de energía entre el 6s y el 5d es pequeña. Esto hace posible que uno de los dos electrones 6s esté en los orbitales 5d.

Explanation:

Potassium dichromate (VI) [K2Cr2O7], which is a salt becomes a liquid at 500°C.

Potassium dichromate is the potassium salt, which is the dipotassium salt of dichromic acid. It acts as an oxidant, allergen and sensitizer. Contains dichromate (2-).

Potassium dichromate is an orange-to-red crystalline inorganic compound that emits toxic chromium fumes when heated. Potassium dichromate is highly corrosive and a strong oxidizing agent. This substance is used as a wood preservative, in the manufacture of pigments, and in the photomechanical process, but is largely replaced by sodium dichromate. Potassium dichromate primarily affects the respiratory tract, causing ulcers, shortness of breath, bronchitis, pneumonia, and asthma, but it can also affect the digestive tract, liver, kidneys, and immune system. Known human carcinogen and associated with increased risk of developing lung and sinus cancer

To know more about Potassium dichromate

https://brainly.com/question/18851117

#SPJ1

Answer:

I think the answer is

2) They have the same number of valence electrons

(a) Nonpolar covalent compound: O2 , (b) Polar covalent compound: HBr, (c) Nonpolar covalent compound: H2O and (d) Nonpolar covalent compound: I2 .

Nonpolar molecules are molecules that have no electrical charge and a symmetrical distribution of electrons. This means that the molecules have a uniform distribution of electrons around its nucleus, creating no electrical imbalance. Nonpolar molecules are not attracted to other molecules, so they tend to be more stable and have lower boiling points than molecules with electrical charges. Examples of nonpolar molecules include methane, carbon dioxide, and hydrogen. Nonpolar molecules are also hydrophobic, meaning they do not mix with water, so they tend to be less soluble in water than polar molecules.

To learn more about Nonpolar

https://brainly.com/question/1426521

#SPJ4

answer and explanation

1 L = 1000 mL

and so to determine 7.8L we can o the calculation as follows

x mL = 1000 mL/ 1 L x 7.8 L/1 = 7800 mL/1 = 7800 mL

Among the elements Rb (rubidium), Na (sodium), K (potassium), Cs (cesium), and Li (lithium), the one that would give the least vigorous reaction when dropped in water is lithium (Li).

Lithium is the lightest metal in the alkali metal group and is known to exhibit relatively mild reactivity when exposed to water. When a small piece of lithium is dropped into water, it reacts slowly, producing hydrogen gas (H2) and lithium hydroxide (LiOH). The reaction is exothermic, but compared to the other alkali metals, such as sodium and potassium, the reaction of lithium with water is less vigorous.

Sodium, potassium, rubidium, and cesium, on the other hand, are more reactive in water. They undergo rapid and vigorous reactions, often accompanied by the release of large amounts of heat and the formation of hydrogen gas. The reactivity of these metals increases as you move down the group, with cesium being the most reactive among them.

The reactivity of alkali metals with water can be attributed to their low ionization energy and the strong desire to lose their outermost electron to attain a stable electronic configuration. As the atomic size increases down the group, the outer electron becomes farther away from the nucleus, making it easier to remove.

In summary, among the given options, lithium (Li) would give the least vigorous reaction when dropped in water. Its relatively lower reactivity compared to the other alkali metals makes it a suitable choice for certain applications where a less violent reaction is desired.

Learn more about Metal Reactions :

https://brainly.com/question/25103661

#SPJ11

The molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol. Details on how to calculate molecular mass can be found below.

The molecular mass of a gas can be calculated by using the following expression:

Molecular weight of the gas = mass × volume at STP (22.4L)/ volume of gas

= 0.344 × 22.4/0.2

= 7.7056/0.2

= 38.53g/mol

Therefore, the molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol.

Learn more about molecular mass at: https://brainly.com/question/14122402

Answer:

Mouth

Esophagus

Stomach

The small intestine

Colon (large intestine)

Rectum

Answer: voltage drops in each resistor ΔU= RI

Explanation: if lamps or other resistor which cause load are in series in

Electric circuit, current I passing circuit is same. Voltage decreases

In every resistor

Answer:

B203 (boron trioxide)....

The formula of the compound of boron and oxygen is Boron oxide B₂O₃. The formula of the compound of Lithium and nitrogen is Li₃N (lithium nitride).

A formula of a compound gives information about the chemical proportions of each element in a compound or molecule. The chemical formula is usually written by including the symbols of elements, numbers as subscripts, and some other symbols, such as dashes, plus (+) and minus (-) signs, commas, or brackets.

We can draw a simple structure in the chemical formula of a compound. Chemical formulae of compounds must be limited in power than chemical names and structural formulae. In chemistry, we have two types of chemical formulas: empirical formulas and molecular formulas.

The charge on the Lithium is +1 and the charge on the Nitrogen is -3. when three Lithium cation combines with one nitrogen anion and the chemical formula Li₃N of lithium nitride.

Learn more about chemical formula, here:

brainly.com/question/11140581

#SPJ2

Answer:I think it’s y sorry if I’m wrong

Explanation:

Answer:

i think it might be y

Explanation:

Answer:

Home

Home

Slower

Explanation:

A liquid starts changing its phase to gas when the two pressures become the same i.e., vapor and atmospheric.

At a higher altitude the atmospheric pressure lowers so little amount of heat is required for the vapor pressure of water to equalize with the atmospheric pressure at a higher altitude.

The pressure at the Rosa's home will be higher and lower in the campsite.

The boiling point will be higher at her home.

As the boiling point is lower in the campsite the water used in cooking noodles will evaporate faster this may lead to the noodles being under cooked. The water may evaporate before the noodles have cooked. So, the noodles will cook at a slower rate at the campsite and faster in her home.

A. The atmospheric pressure at Rosa's home is higher than her campsite.

B. The boiling point of water at Rosa's home is higher.

C. The noodles will be cooked faster at Rosa's home compared to at the campsite

A. The pressure has been the force that has been exerted by the molecules against each other, The higher altitude has lesser air molecules, which resulted in the lower pressure.

Since the pressure at 33 feet has been higher as than the pressure at 11,000 feet altitude, the atmospheric pressure at Rosa's home is higher than her campsite.

B. The boiling point has been the temperature at which liquids have been converted to gases. With the decrease in atmospheric pressure, there has been a lowering in the boiling point as well.

The atmospheric pressure at Rosa's home is higher compared to her campsite. Thus, the boiling point of water at Rosa's home is higher.

C. The lower atmospheric pressure at the campsite has been responsible for the lower boiling point of the temperature, This implies that water has converted to steam at lower temperatures. The lower temperature of water requires more time for the noodles to be cooked.

Thus, the noodles will be cooked faster at Rosa's home compared to at the campsite.

For more information about the atmospheric pressure, refer to the link:

https://brainly.com/question/1393320

Engineers carefully choose the "shape" and "material" to control sound waves.

The shape of a room, object, or device can affect how sound waves travel, reflect, and interfere with each other. Engineers use principles of acoustics to design spaces and objects that can control the propagation of sound waves, for example, to prevent echoes or to create a desired acoustic environment.

The material of a surface can also affect how sound waves behave when they interact with it. Some materials absorb sound, while others reflect it, and the choice of material can have a significant impact on the acoustics of a space. Engineers select materials based on their acoustic properties to achieve the desired sound control or quality.

Answer:

the mass of a tree is primary carbon

Explanation:

the the carbon comes from carbon dioxide during photosynthesis

Answer:

Plants get all the carbon, hydrogen, and oxygen they need from carbon dioxide and water, which they use to build carbohydrates during photosynthesis. To build other kinds of molecules they also need elements like nitrogen, phosphorous, and sulfur. Plants get these as well as other elements from the soil.

Explanation:

The product of an acid-base reaction that is most likely to be an ionic compound is a salt. Option D).

In an acid-base reaction, the product that is most likely to be an ionic compound is a salt. A salt is formed when an acid reacts with a base, resulting in the transfer of ions between the two reactants. Acids typically release hydrogen ions (H+) when dissolved in water, while bases release hydroxide ions (OH-). When these ions combine, they form water (H2O), which is a neutral molecule.

However, in addition to water, the reaction between an acid and a base also produces a salt. A salt is an ionic compound composed of positive and negative ions. The positive ion usually comes from the base, while the negative ion comes from the acid. The combination of these ions results in the formation of an ionic compound, which is commonly referred to as a salt.

Therefore, the product of an acid-base reaction that is most likely to be an ionic compound is a salt. Hence option D) is correct.

For more question on salt

https://brainly.com/question/20835655

#SPJ8