Ok
Element symbol _____?
Total electrons _____?
valence electrons _____?

Tysm :D has

Answer:

The reproductive system controls the production of offspring .

Explanation:

I know things

Answer:

sf2 is a molecule that has a net dipale moment.

Answer:
The empirical formula is Na3Cl4O8

Explanation:

The empirical formula is the simplest whole number ration of an element

Answer: that would be nice

How?

Explanation:

Answer: The bus traveling 200km in 6 hours is traveling the fastest.

Explanation:

Bus 1

150km/5hrs

Simplify -> 30km/hr

Bus 2

200km/6hrs

Simplify -> About 33.333km/hr

Answer: Christy won Molly by 12cm

Explanation:

Ist step

Molly's ;ong jump was 118.3cm

Christy long jump was 51.18inches

2nd Step

we change christy score to cm so we can compare

1 inch = 2.54cm.

therefore 51.18 inches = 51.18 x 2.54= 129.9972cm

Christy won molly by 129.9971cm-118.3cm=11.69 rounded to 12cm

Christy won Molly by 12cm

Explanation:

This is most likely a trick question as oxygen do not react with CO2.

Answer:

An object floats when the weight force on the object is balanced by the upward push of the water on the object. ... If the weight force down is larger than the upward push of the water on the object then the object will sink. If the reverse is true then the object will rise – rising is the opposite of sinking.

Explanation:

Take what you will from this.

Answer:

Wood, rubber, plastic, egg, palm leaves, styrofoam, and some types of natural rocks too!

Water is the solvent in the saline solution. Hence, option D is correct.

A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.

In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. Water is the solvent in the saline solution.

Hence, option D is correct.

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Answer:

the answer is false :)

Explanation:

The given statement is true. Plant cell have a cell wall instead of a cell membrane.

Cell is the basic unit of life. There are two kinds of cell such as plant cell and animal cell. Plant cell have cell wall. Animal cell have do not have cell wall.

Cell wall is only present in some bacteria and plant cell. The cell wall of plant cell is made up of cellulose.

The cell wall is protective layer. It protects the plants from surrounding environment.

Therefore, The given statement is true. Plant cell have a cell wall instead of a cell membrane.

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Answer:

0 to +8, and −2

Explanation:

Answer:

In addition to carbonyl and organometallic compounds in the low oxidation states −2, 0, and +1, ruthenium forms compounds in every oxidation state from +2 to +8. Very volatile ruthenium tetroxide, RuO4, used in separating ruthenium from other heavy metals, contains the element in the +8 oxidation state.

Valence: 1, 2, 3, 4, 5, 6, 7, 8

Melting point: 2,250° C (4,082° F)

and the most stable oxidation state of ruthenium is +8

The coefficients in front of each reactant and product allow us to predict how much reactants are required to form a given amount of products.

Reactants are converted to products and the process is symbolized by a chemical equation. For example  (Fe) and  (S) combine to form iron sulfide Fe(s) + S(s) → FeS(s) The plus sign indicates that iron reacts with sulfur.

Therefore, chemical equation is a mathematical expression of the chemical reaction which represents the product formation from the reactants. In an equation the reactants are written on the left-hand side and the products are written on the right-hand side demonstrated by one-headed.

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Thus we need to use 1.0 mL of the 100. mg/L quinine stock solution to prepare a 10.0 mg/L standard quinine solution with a final volume of 10.0 mL.

To prepare a 10.0 mg/L standard quinine solution with a final volume of 10.0 mL from a 100. mg/L quinine stock solution, you will need to use the following steps:

1. Identify the desired concentration: In this case, you want a 10.0 mg/L quinine solution.
2. Identify the final volume required: You want a 10.0 mL solution.
3. Determine the concentration of the stock solution: The given stock solution has a concentration of 100. mg/L.

Now, use the dilution formula C1*V1 = C2*V2, where C1 is the initial concentration, V1 is the volume of the stock solution to be used, C2 is the desired concentration, and V2 is the final volume.

Plugging in the values:
(100 mg/L) * V1 = (10.0 mg/L) * (10.0 mL)

To find V1, divide both sides by 100 mg/L:
V1 = (10.0 mg/L) * (10.0 mL) / (100 mg/L)

V1 = 1.0 mL

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Molecular equation nickel(ii) iodide (Nil₂) is

NiI₂ (s) → Ni²⁺ (aq) + 2I⁻ (aq)

The reaction equation is written in detail by including every symbol, letter, and number. Reaction equations can explain the occurrence of chemical reactions, in which there are several things, such as the chemical formulas of the reactants and reaction products, followed by their respective coefficients and phases.

In writing reaction equations, information is usually given related to the physical condition of the compound. There are four physical conditions in compounds commonly used, namely solid, liquid, and gas. Solids have the symbol "s", liquids have the symbol "l", aqueous have the symbol "aq", and gases have the symbol "g".

So, reaction equation nickel(ii) iodide:

                                         NiI₂ (s) → Ni²⁺ (aq) + 2I⁻ (aq)

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In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.

A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.

On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).

Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.

On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.

In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.

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It will take 130 minutes for 750 mg of lidocaine to be administered if the rate is set at 5 ml/min.

To calculate this, first, we have to convert the 750 mg of lidocaine to mL. Since each 150 mL contains 500 mg of the drug lidocaine, 750 mg is equivalent to 1.5 mL. Then, divide 1.5 mL by the rate of 5 mL/min to get the total time in minutes. Therefore,

1.5 mL/5 mL/min = 0.3 minutes,

and 0.3 minutes x 60 minutes/1 minute = 30 minutes.

Since 750 mg of lidocaine is equivalent to 1.5 mL, it will take 130 minutes to administer 750 mg of lidocaine at a rate of 5 mL/min.

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Answer:

Yes

Explanation:

You can find the density of the object using the law: density = mass / volume.

If the density of the object is less than the density of water (1g/cm3) then it will float, otherwise, it should sink.

The latent heat of vaporization of boiling water is 540 cal/gm. Option b is the correct answer.

It is the amount of heat needed to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature. The latent heat of vaporization for water is relatively high compared to other liquids because of the strong hydrogen bonding between water molecules. This means that water requires a lot of energy to break these bonds and change from a liquid to a gaseous state. The latent heat of vaporization is also responsible for the cooling effect of evaporation. When sweat evaporates from our skin, it absorbs heat from our body, which helps to cool us down. In conclusion, the latent heat of vaporization of boiling water is 540 cal/gm, which represents the amount of heat required to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature.

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Answer:

\(\boxed {\boxed {\sf 232.9 \textdegree C}}\)

Explanation:

This question asks us to find the temperature change given a volume change. We will use Charles's Law, which states the volume of a gas is directly proportional to the temperature. The formula is:

\(\frac {V_1}{T_1}= \frac{V_2}{T_2}\)

The volume of the gas starts at 250 milliliters and the temperature is 137 °C.

\(\frac{250 \ mL}{137 \textdegree C}= \frac{V_2}{T_2}\)

The volume of the gas is increased to 425 milliliters, but the temperature is unknown.

\(\frac{250 \ mL}{137 \textdegree C}= \frac{425 \ mL}{T_2}\)

We are solving for the new temperature, so we must isolate the variable T₂. First, cross multiply. Multiply the first numerator and second denominator, then multiply the first denominator and second numerator.

\(250 \ mL * T_2 = 137 \textdegree C * 425 \ mL\)

Now the variable is being multiplied by 250 milliliters. The inverse of multiplication is division. Divide both sides of the equation by 250 mL.

\(\frac{250 \ mL * T_2}{250 \ mL}=\frac{ 137 \textdegree C * 425 \ mL}{250 \ mL}\)

\(T_2=\frac{ 137 \textdegree C * 425 \ mL}{250 \ mL}\)

The units of milliliters (mL) cancel.

\(T_2=\frac{ 137 \textdegree C * 425 }{250 }\)

\(T_2= \frac{58225}{250} \textdegree C\)

\(T_2=232.9 \textdegree C\)

The temperature changes to 232.9 degrees Celsius.

Answer:

D. create metal works of art. The bronze age was the age of crafting out of metal. So, using swords of metal would fit directly into the bronze age as they're metal.

The hydrogen atom attains the electron configuration of helium, while the chlorine atom attains the electron configuration of neon. This is because hydrogen has only one electron, and by sharing it with chlorine, it completes its first energy level, which is similar to helium's configuration.

Chlorine has seven electrons in its outermost energy level, and by sharing one electron with hydrogen, it achieves eight electrons, completing its second energy level, which is similar to neon's configuration.

In the diatomic molecule HCl, the hydrogen atom (H) has one electron and chlorine (Cl) has seven electrons in its outermost energy level. By sharing a pair of electrons, hydrogen achieves the electron configuration of helium, which has two electrons in its outermost energy level. This is because the shared electron pair fills the 1s orbital, which is the first energy level for hydrogen.

Chlorine, after sharing the electron pair, achieves the electron configuration of neon, which has eight electrons in its outermost energy level. This is because the shared electron pair completes the 2p orbital, which is the second energy level for chlorine. Therefore, the answer is helium; neon, indicating the electron configurations attained by hydrogen and chlorine, respectively.

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The bimodal size distribution of particles emitted from coal-fired power plants refers to the presence of two distinct modes or peaks in the particle size distribution curve. These modes represent different fractions of particles with different sizes. In this case, the smaller fraction of particles in the distribution can have potential environmental implications.

The smaller fraction of particles typically consists of fine particles, also known as PM2.5 (particulate matter with a diameter of 2.5 micrometers or smaller). These particles are small enough to be easily inhaled and can penetrate deep into the respiratory system.

Inhalation: Fine particles can be inhaled and deposited in the lungs, leading to potential health issues. They can contribute to respiratory problems such as asthma, bronchitis, and other respiratory diseases. Long-term exposure to fine particles can also increase the risk of cardiovascular diseases and premature .

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Answer:

decreases

Explanation:

I'm hope it's correct

When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.

In terms of thermochemistry, an exothermic reaction means the reaction where the total standard enthalpy should change so ΔH⚬ is negative. Also it should be release heat.

So based on this, When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.

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Answer:

combustion or/and oxidation

Explanation:

The first step of the reaction, we have  reaction between a nucleophile and an electrophile.

We can see that in the first step of the reaction, we have  reaction between a nucleophile and an electrophile. In this case, the electrophile would have to be an alkyl halide which produces a carbocation as show in the image attached. What we have here is quite similar or  like most of the organic reactions, this reaction occurs in a number of detailed or smaller steps and each step of the reaction is going to help to bring us closer to the end product of the entire steps of the reaction which is wat we target as we carry out the particular reaction.The second step involves the reduction of the alkyne with the use of a Lindlar catalyst. As such the reaction is poisoned and it stops at the alkyne stage rather than going on to obtain the alkane.

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Answer:

c

Explanation:

Answer:

Explanation:

Since salt is composed of two ions Na+ and Cl- it will attract to the opposite poles of the water and form a ion-dipole bond. This will cause the phenomenon freezing point depression where as the name states it will take a lower tempertature to freeze it. So instead of freezing at 0 degrees c it will freeze at a negative 2 or so on.

The salt ions end up slowing the growth of ice as the water molecules re-freeze.

Freezing point depression can be defined as the decreasing of the freezing point of pure solvents upon the addition of different kinds of solutes.

Depression in the freezing point can be defined as a colligative property that is proportional to the molality of the solution.

As liquid water gets colder and colder, the motions of water molecules become slower and slower. When salt is added to water, the saltwater solution is composed of both water molecules and dissolved salt ions.

As a result, salt ions can easily replace some of the water molecules. Saltwater freezes more slowly than pure water due to many of the water molecules would be "crashing" into the ice's surface in pure water and are replaced by salt ions.

Therefore, the salt water will freeze at a lower temperature than the pure water.

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Answer:

the mass of the copper piece is 110.2976 grams

Respuesta:

292 g / mol;

Por favor, consulte la explicación.

Explicación:

El número de átomos de cada elemento en el compuesto: Fe2 (co3) 3.

Fe = 2; C = 3; 0 = 3 * 3 = 9

Fe2 = 112 g / mol

C = 12 g / mol

O = 16 g /

Masa molecular = ((112 + (12 * 3) + (16 * 9)

= (112 + 36 + 144)

= 292 g / mol.

Total = 2 + 3 + 9 = 14

Fe2 = 112/292 * 100% = 38,356%

C = 36/292 * 100% = 12,328 * '

O = (16 * 9) / 292 * 100% = 49,32%