The nucleus of a fluorine atom has a charge of?


A. +19

B. 0

C. +9

D. +1

Answer:

Oxygen has 8 neutrons

Explanation:

We know that cause the atomic number says how many protons does the element has, so in this case is eight, and in the mass number, we have the number of protons+neutrons, in this case is 16. Then, as we know that oxygen has eight protons with the atomic number, we would do 16-8 protons= 8 neutrons.

Check: Atomic number is 16= 8 protons + 8 neutrons

Avogadro's number is approximately 6.022 x 10^23, representing the number of particles in one mole of a substance.

Avogadro's number, denoted as N_A, is a fundamental constant in chemistry and physics. It represents the number of particles, specifically atoms or molecules, in one mole of a pure substance. The value of Avogadro's number is approximately 6.022 x 10²³ particles per mole.

The concept of Avogadro's number is essential for understanding the relationship between the macroscopic and microscopic worlds.

It allows scientists to bridge the gap between measurable quantities, such as mass or volume, and the atomic or molecular scale. One mole of any substance contains Avogadro's number of particles, regardless of the element or compound.

Avogadro's number enables calculations involving the mole, such as determining the number of atoms or molecules in a given sample, or converting between mass and moles.

It is a cornerstone of stoichiometry, the branch of chemistry concerned with the quantitative relationships between reactants and products in chemical reactions.

In summary, Avogadro's number is a crucial constant that facilitates understanding and calculations involving the vast number of particles present in one mole of a pure substance.

Learn more about Moles

brainly.com/question/15209553

#SPJ11

The substrate is R-2-chlorobutane, the nucleophile will attack from the opposite side of the leaving group to give an inversion of configuration at the chiral center. Thus, the product will be S-2-iodobutane.

The reaction of R-2-chlorobutane with NaI in acetone is an example of an SN2 nucleophilic substitution reaction. In this reaction, the iodide ion (I-) acts as a nucleophile, attacking the carbon atom that is attached to the chlorine atom in R-2-chlorobutane.

The stereochemistry of the product will depend on whether the nucleophile attacks from the same side or the opposite side of the leaving group (chlorine) in the substrate.

The reaction can be represented by the following equation:

R-2-chlorobutane + NaI → S-2-iodobutane + NaCl

The product S-2-iodobutane has a chiral center at the second carbon atom, and the iodine atom is attached to the opposite side (i.e., the S-side) of the chlorine atom that was originally attached to the substrate.

Here you can learn more about S-2-iodobutane

https://brainly.com/question/31436020#

#SPJ11  

Explanation:

Electronic Configuration for Li: 1s²2s¹

Electronic Configuration for Cl: [Ne]3s²3p⁵

When Lithium and Chlorine bonds together, the electron in the Lithium 2s subshell will be transfered to the Chlorine 3p subshell, giving both the Lithium and Chlorine atoms a complete 1st and 3rd energy levels respectively.

Formula for Lithium chloride: LiCl.

Answer:

d.

Explanation:

Answer:

D!

Explanation:

A is not true! When big meteors fall into the ocean, they cause mega-tsunamis I think, which does a lot of damage.

B, no, Uranus does too.

C, I think this is untrue, red wavelength and reflects the blue the blue!

D, is so true! A lot of reliable sources on this one!

Sorry if I did any wrong, I haven't learn chemistry in school yet.

A total of 75.0 joules of heat are absorbed as 3.5 moles of lead are heated from 12.0°C to 52.0°C.The specific heat of lead is 142.8× 10²³ J/gºC.

The term specific heat is defined as the quantity of heat required to increase the temperature of one gram of a substance by one Celsius degree. Its units are J/(kg K) or J/(kg °C).

Given:

Q = m × c ×ΔT

T = 52.0°C - 12.0°C

= 40°C

M = 21 × 10²³grams

Q = 75.0 joules

C = Q / M × ΔT

C =  75 J /21 × 10²³grams  × 40.0

C = 3.5 × 10-²³ × 40× 10²³

C = 142.8× 10²³ J/gºC

Thus, the specific heat of lead is 142.8× 10²³ J/gºC.

To learn more about the specific heat, follow the link;

https://brainly.com/question/11297584

#SPJ1

The features of a standard hydrogen electrode are :

1. Temperature of 298 K (25°C)

2. Carbon electrode

3. Hydrogen gas at 1.01 x 10^5 Pa (1 atm) pressure

4. Electrolyte solution containing a hydrogen ion activity of 1 mol/L

5. Platinum wire as the current collector

6. A Potential of 0.00 V (relative to the hydrogen gas)

These features are what make up the Standard Hydrogen Electrode (SHE). The temperature of 298 K is the temperature at which the SHE is calibrated and is the standard temperature used in most laboratory experiments. The carbon electrode serves as the interface between the hydrogen gas and the electrolyte, and the hydrogen gas is held at 1.01 x 10^5 Pa (1 atm) pressure. The electrolyte solution contains a hydrogen ion activity of 1 mol/L, which is necessary for the electrode to function properly. A platinum wire is used as the current collector, and the electrode has a potential of 0.00 V, relative to the hydrogen gas. All of these features are necessary for the SHE to function properly and for the electrode to serve as the reference for all other electrochemical measurements.

To know more about electrodes refer to the link  brainly.com/question/17060277

#SPJ4

The ions that is most likely to be leached from the soil is the correct option is B) chlorine ions.

The Chlorine ions are the negatively charged ions and are this is the reason it is not likely to be bound to the negatively charged soil particles. The Chlorine kills most of the microbes in the soil. Making the worm tea with the chlorinated water that defeats the purpose of the worm tea.

The Leaching occurs as the excess water removes the water - soluble nutrients out of the soil, by the runoff or the drainage. The Leaching is the environmental problem for the agricultural professionals.

To learn more about chlorine here

https://brainly.com/question/13346081

#SPJ4

The central atom of ICl2- has three lone pairs in the Lewis structure.

Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs), are diagrams that show the covalent bonds that connect atoms in a molecule as well as any lone electron pairs that may be present. Any covalently bonded molecule, as well as coordination compounds, can be given a Lewis structure. Gilbert N. Lewis, who proposed the Lewis structure in his 1916 article The Atom and the Molecule, was named after it. Lewis structures extend the concept of the electron dot diagram by drawing lines between atoms to represent shared pairs in a chemical bond.

Learn more about Lewis electron dot structures here:-

https://brainly.com/question/11967426

#SPJ4

The Density of a substance is simply defined as the mass of the subtance per unit volume of the substance i.e

Density = mass /volume

To solve the question given above, we'll begin by calculating the volume of the zinc. This can be obtained as follow:

Density of Zinc = 7.10 g/cm³

Mass of Zinc = 46.77 g

Density = mass /volume

7.10 = 46.77 / Volume

Cross multiply

7.10 × Volume = 46.77

Divide both side by 7.10

Volume = 46.77 / 7.10

Finally, we shall determine the new volume of the water. This can be obtained as follow:

Volume of Zinc = 6.59 cm³ = 6.59 mL

Volume of water = 33.33 mL  

New volume of water = (Volume of Zinc) + (Volume of water)

New volume of water = 6.59 + 33.33

Therefore, the new volume of water is 39.92 mL

Learn more: https://brainly.com/question/24472494

Answer: 6m/s

Explanation:

Speed is calculated as distance divided by time. Therefore, the speed of the traveling puck would be calculated as the distance travelled by the hockey puck divided by the time taken. This will be:

= 18m / 3s

= 6m/s

The answer is 6 meters per second

Answer:

it changes when you put water on it

Answer:

Because

Explanation:

A orange is called a orange because it is the color orange

as well as orange is orange because of the orange

The rate constant (k) for the given reaction is 0.3695 mol⁻².L².s⁻¹.

The correct option for the second question is enthalpy of reaction.

Reaction is a process where reactants undergo a transformation and lead to the formation of products. The factors that affect the kinetics of a reaction are temperature, catalyst, concentration, surface area and pressure. Out of these, enthalpy of reaction is not a factor affecting the kinetics of a reaction.

A given reaction is first order with respect to A and second order with respect to B. The rate law for the reaction is given as-

Rate = k[A][B]²

Given data- [A] = 0.6892 mol; [B] = 0.8342 mol; rate = 0.1952 M/s

We know that, for any chemical reaction, the rate constant (k) is the proportionality constant between the rate of the reaction and the concentrations of the reactants. Using the given values, we can substitute them in the rate law and calculate the value of the rate constant (k).0.1952 M/s = k (0.6892 M) (0.8342 M)²k = 0.3695 mol⁻².L².s⁻¹

Therefore, the rate constant (k) is 0.3695 mol⁻².L².s⁻¹.

The correct option is enthalpy of reaction.

To learn more about "rate constant", visit:  https://brainly.com/question/24749252

#SPJ11

Answer:

Method: Measure out 25 cm3 of 0.5 mol dm3 lead(II)nitrate solution and add it to a small beaker. Measure out 25 cm3 of 0.5 mol dm3 of potassium sulfate add it to the beaker and mix together using a stirring rod.

The given model shows the covalent bond.

A covalent bond includes the mutual sharing of one or more pairs of electrons among atoms. these electrons are concurrently attracted via the 2 atomic nuclei. A covalent bond bureaucracy when the difference among the electronegativities of atoms is just too small for an electron transfer to arise to form ions.

A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms. these electron pairs are referred to as shared pairs or bonding pairs. The stable stability of appealing and repulsive forces between atoms, once they share electrons, is known as covalent bonding.

Learn more about covalent bonds here:-https://brainly.com/question/3447218

#SPJ1

Answer:

Bohr thought that electrons orbited the nucleus in circular paths; whereas in the modern view atomic electron structure is more like 3D standing waves. ... He believed that electrons moved around the nucleus in circular orbits with quantised potential and kinetic energies.

Answer:

The answer is A electrons exist in specified energy levels surrounding the nucleus. for people in edguinity

Explanation:

Answer:

27.19 cm.

Explanation:

From the question given above, the following data were obtained:

Height (h) of cylinder = 6461.76 cm

Volume (V) of cylinder = 15000000 cm³

P1 (π) = 3.14

Radius (r) =.?

Thus, we can obtain the radius of the cylinder water tank by using the following formula as illustrated below:

V = πr²h

15000000 = 3.14 × r² × 6461.76

15000000 = 3.14 × 6461.76 × r²

Divide both side by 3.14 × 6461.76

r² = 15000000 / (3.14 × 6461.76)

Take the square root of both side

r = √[15000000 / (3.14 × 6461.76)]

r = 27.19 cm

Thus, the radius of the cylinder water tank is 27.19 cm.

Answer:

C. is the correct answer

Explanation:

I took the test

The specific heat of the metal is 0.30J/g°C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Step 1: Data given

Mass of metal = 75.0 g

Temperature of the metal = 65°C

Mass of water = 100.0 g

Temperature of the water = 20.0°C

Final temperature of the water = 22.3 °C

The specific heat of water is 4.184 J/g°C

Step 2: Calculate the specific heat of metal

Qlost = -Qgained

Q= m xCxΔT

Qmetal = -Qwater

m(metal) x c(metal) x ΔT(metal) = - m(water) x c(water) x ΔT(water

⇒m(metal) = the mass of metal = 75.0 g

⇒c(metal) = the specific heat of the metal = ?

⇒ΔT = The change of temperature = 22.3 - 65°C = -42.7 °C

⇒m(water) = the mass of water = 100.0 g grams

⇒c(water) = the specific heat of water = 4.186 J/g°C

⇒ΔT(water) = T2 - T1 = 22.3 - 20.0 = 2.3 °C

75.0 g x c(metal) x -42.7 °C= -100.0 g x  4.186 x 2.3

75.0 g x c(metal) x -42.7 °C = −962.78

c(metal) = 0.3006338798J/g°C =0.30J/g°C

The specific heat of the metal is 0.30J/g°C.

Learn more about specific heat capacity here:

https://brainly.com/question/1747943

#SPJ1

The ratio between the maximum and minimum sound intensities that produce a particular loudness is known as the dynamic range.

The specific ratio can vary depending on the loudness level and the individual's perception.For example, the dynamic range for a loudness level of 60 dB may be around 1,000 to 1, meaning the maximum sound intensity is 1,000 times louder than the minimum sound intensity required to produce that loudness level.

However, in general, the dynamic range for human hearing is estimated to be around 120 decibels, meaning that the loudest sound we can tolerate is around 120 dB greater than the quietest sound we can hear.

To know more about dynamic range click on below link :

https://brainly.com/question/30481254#

#SPJ11

Answer:

Natural gas is an odorless, gaseous mixture of hydrocarbons—predominantly made up of methane (CH4). It accounts for about 30% of the energy used in the United States. About 40% of the fuel goes to electric power production and the remaining is split between residential and commercial uses, such as heating and cooking, and industrial uses. Although natural gas is a proven, reliable alternative fuel that has long been used to power natural gas vehicles, only about two-tenths of 1% is used for transportation fuel.

The vast majority of natural gas in the United States is considered a fossil fuel because it is made from sources formed over millions of years by the action of heat and pressure on organic materials. Alternatively, renewable natural gas (RNG), also known as biomethane, is a pipeline-quality vehicle fuel produced from organic materials—such as waste from landfills and livestock—through anaerobic digestion. RNG qualifies as an advanced biofuel under the Renewable Fuel Standard.

Because RNG is chemically identical to fossil-derived conventional natural gas, it can use the existing natural gas distribution system and must be compressed or liquefied for use in vehicles.

CNG and LNG as Alternative Transportation Fuels

Two forms of natural gas are currently used in vehicles: compressed natural gas (CNG) and liquefied natural gas (LNG). Both are domestically produced, relatively low priced, and commercially available. Considered alternative fuels under the Energy Policy Act of 1992, CNG and LNG are sold in units of gasoline or diesel gallon equivalents (GGEs or DGEs) based on the energy content of a gallon of gasoline or diesel fuel.

Compressed Natural Gas

CNG is produced by compressing natural gas to less than 1% of its volume at standard atmospheric pressure. To provide adequate driving range, CNG is stored onboard a vehicle in a compressed gaseous state at a pressure of up to 3,600 pounds per square inch.

CNG is used in light-, medium-, and heavy-duty applications. A CNG-powered vehicle gets about the same fuel economy as a conventional gasoline vehicle on a GGE basis. One GGE equals about 5.66 pounds of CNG.

Liquefied Natural Gas

LNG is natural gas in its liquid form. LNG is produced by purifying natural gas and super-cooling it to -260°F to turn it into a liquid. During the process known as liquefaction, natural gas is cooled below its boiling point, removing most of the extraneous compounds found in the fuel. The remaining natural gas is primarily methane with small amounts of other hydrocarbons.

Because of LNG's relatively high production cost, as well as the need to store it in expensive cryogenic tanks, the fuel's widespread use in commercial applications has been limited. LNG must be kept at cold temperatures and is stored in double-walled, vacuum-insulated pressure vessels. LNG is suitable for trucks that require longer ranges because liquid is denser than gas and, therefore, more energy can be stored by volume. LNG is typically used in medium- and heavy-duty vehicles. One GGE equals about 1.5 gallons of LNG.

Answer:

Ik Gymnosperms

Explanation:

term that means naked seeds

Answer:

gymnosperm and angiosperm

Explanation:

Using thermodynamics

\(\\ \sf\longmapsto Q=mc∆T\)

\(\\ \sf\longmapsto Q=0.015(328)(4184)\)

\(\\ \sf\longmapsto Q=20585.28J\)

Answer:

1.1 mol of O2

Explanation:

First we need the balance chemical equation which is

2 H2O2 -------> 2 H2O + O2

This is important because in stoichiometry you can go from units of one thing to other by using mole ratios, here the mole ratio is 2 mol of H2O2  for one mole of O2.

\(2.2 mol H2O2 \frac{1mol O2}{2 mol H2O2}\) = 1.1 mol of O2

Gesso is a white paint blend that comprises pigment, chalk and gypsum. It is a medium utilised for surface preparation and as a primer for a painting.

Gesso is widely utilized for preparing surfaces and as primers by painters. They were used by painters and artists earlier to make canvas, boards for painting purposes.

It was first formulated by chalk powder dust and pigment derived from the animal skin. They are widely used because of their adhering properties.

The use of the gesso makes the paint adhere to the canvas and the board surfaces and also, makes the surface textured.

Therefore, option b. it is used for preparing the surface is correct.

Learn more about gesso here:

https://brainly.com/question/1191408

Answer:

b on edge

Explanation:

It is true that an established turf that is too acidic can be effectively top dressed with agricultural lime to lower ph.

pH stands for "potential hydrogen" and refers to the measure of acidity or alkalinity of a solution. pH is a scale that ranges from 0 to 14, where 0 is highly acidic, 7 is neutral, and 14 is highly alkaline. The pH scale is logarithmic, meaning that a solution with a pH of 6 is ten times more acidic than a solution with a pH of 7. The pH of a solution is important because it affects the solubility and availability of nutrients in soil for plants, and it can also impact the growth and survival of aquatic organisms in water. Maintaining the proper pH level is essential for many biological systems and can help ensure optimal growth and health.

Learn more about ph:

brainly.com/question/2288405

#SPJ4

Answer:

1935J

Explanation:

Answer:

\(\boxed {\boxed {\sf C. \ 1935 \ J}}\)

Explanation:

The equation for this problem is:

\(q=mc\Delta T\)

where m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

The mass is 3 kilograms, but the specific heat capacity includes grams in the units. Convert kilograms to grams. There are 1000 grams in 1 kilogram.

The specific heat capacity for lead is found on the table. It is 0.129 J/g°C.

Let's find the change in temperature. It is raised from 15 °C to 20 °C.

Now we know every value.

Substitute the values into the formula.

\(q= (3000 \ g)( 0.129 \ J/g \textdegree C)(5 \textdegree C)\)

Multiply the first 2 numbers together. The units of grams cancel.

\(q= (387 \ J/ \textdegree C )(5 \textdegree C)\)

Multiply again. This time the units of degrees Celsius cancel.

\(q= 1935 \ J\)

1935 Joules of energy are required and choice C is correct.

Answer:

porh hun xxxx ysn po answet