What effect does attendance have on students grade in science class?
Hypothesis:

The correct steps to the following question will be- A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a +2 ion → Each fluorine atom becomes a -1 ion.

The electronic configuration of fluorine atom is \(1s^2 2s^2 2p^5\)

The electronic configuration of magnesium is  \(1s^2 2s^2 2p^6 3s^2\)

For fluorine to satisfy the requirements of an inert gas configuration, its valence shell needs one electron.

The magnesium, on the other hand, has two electrons in its valence shell. To be stable, it needs an additional six electrons. Due to its electropositive nature, it will give up two of its electrons in order to take on the configuration of the closest inert gas, neon.

Therefore , magnesium will lose two of its valence electrons and becomes a  positively charged cation having +2 charge.

In conclusion, each of the fluorine atoms will accept one electron from magnesium and becomes negatively charged anion having one unit negative charge.

Learn more about valence electrons at;

https://brainly.com/question/371590

#SPJ1

complete question:

These diagrams show two atoms of fluorine and an atom of magnesium.

Which shows the correct steps in the formation of an ionic bond between these atoms?

A magnesium atom accepts six electrons from the fluorine atoms → Each fluorine atom donates three of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom accepts two electrons from the fluorine atoms → Each fluorine atom donates one of the electrons → The magnesium atom becomes a -2 ion → Each fluorine atom becomes a +1 ion

A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a +2 ion → Each fluorine atom becomes a -1 ion

Considering the atomic masses of each of the elements in (NH₄)₂SO₄, its molecular mass is: 132.17 g/mol.

To calculate the molecular mass of (NH₄)₂SO₄, we need to consider the atomic masses of each element in the compound and multiply them by their respective subscripts.

The atomic masses are:

N (Nitrogen) = 14.01 g/mol

H (Hydrogen) = 1.01 g/mol

S (Sulfur) = 32.07 g/mol

O (Oxygen) = 16.00 g/mol

For (NH₄)₂SO₄, we have:

2 Nitrogen atoms (N) = 2 * 14.01 g/mol = 28.02 g/mol

8 Hydrogen atoms (H) = 8 * 1.01 g/mol = 8.08 g/mol

1 Sulfur atom (S) = 1 * 32.07 g/mol = 32.07 g/mol

4 Oxygen atoms (O) = 4 * 16.00 g/mol = 64.00 g/mol

Adding these values together, the molecular mass of (NH₄)₂SO₄ is:

28.02 g/mol + 8.08 g/mol + 32.07 g/mol + 64.00 g/mol = 132.17 g/mol.

Learn more about Molecular Mass on:

https://brainly.com/question/21334167

#SPJ1

Explanation:

from

c1v1=c2v2

c1=?

c2=0.250

v1=0.0225

V2=0.0100

c1×0.0225=0.250×0.0100

0.0225c1=0.0025

0.0225c1/0.0225=0.0025/0.225

c1=0.1111

Answer:

Chlorine is more likely to steal a valence electron from sodium.

Explanation:

Sodium is number 11 on the periodic table with one valence electron. Belonging to the first group, it's one of the alkali metal, which are known to be highly reactive. Chlorine is number 17 with seven valence electrons, and it's in the second-to-last group of halogens--also very reactive.

Considering that elements with one valence electron are just about 100% likely to give up electrons to reach a stable state, sodium would be the element that is more likely to lose its valence electron to chlorine. In other words, chlorine would be the electron thief.

Answer:

1) atomos. 2) uncuttable.

Explanation:

none

There are 20 positions with the amino acids the same between the two species. Those are 6, 7, 9, 11, 12, 14, 16, 18, 19, 23, 28, 30, 36, 37, 38, 47, 50, 51, 53, and 54.

Amino acids are defined as the molecules that combine to form proteins. Amino acids said as the building blocks of life. The human body uses amino acids to make proteins to help the body to break down the food. There are 12 amino acids. Those are isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, cysteine, tyrosine, histidine and arginine. These are the organic compounds which contain both amino and carboxylic acid functional groups. There are 20 positions with the amino acids of same species.

To learn more about Amino acids

https://brainly.com/question/14351754

#SPJ4

The complete question is,

How many positions are the amino acids the same between the two species?

The breakdown of a 22-carbon fatty acid through aerobic metabolism via beta-oxidation and the citric acid cycle provides a substantial amount of energy in the form of ATP, allowing cells to perform various vital functions.

The approximate energy yield through aerobic metabolism of a 22-carbon fatty acid involves a series of major reactions within the mitochondria of cells. The process is known as beta-oxidation, and it generates acetyl-CoA molecules that enter the citric acid cycle (also known as the Krebs cycle) to produce ATP.

First, the 22-carbon fatty acid undergoes a series of four reactions in the beta-oxidation pathway. Each cycle of beta-oxidation removes a two-carbon acetyl-CoA molecule from the fatty acid chain, generating one molecule of NADH and one molecule of FADH2 in the process. These high-energy electron carriers will later enter the electron transport chain to produce ATP.

After the beta-oxidation process, the resulting acetyl-CoA molecules enter the citric acid cycle. In this cycle, each acetyl-CoA molecule is oxidized, leading to the production of three molecules of NADH, one molecule of FADH2, and one molecule of GTP (which can be converted to ATP). These electron carriers (NADH and FADH2) will transfer their electrons to the electron transport chain for ATP synthesis.

Finally, the electron transport chain, located in the inner mitochondrial membrane, utilizes the high-energy electrons from NADH and FADH2 to pump protons across the membrane. This establishes an electrochemical gradient that drives ATP synthesis through oxidative phosphorylation. The exact number of ATP molecules generated depends on several factors, but on average, the complete oxidation of a 22-carbon fatty acid yields approximately 129 molecules of ATP.

Overall, the breakdown of a 22-carbon fatty acid through aerobic metabolism via beta-oxidation and the citric acid cycle provides a substantial amount of energy in the form of ATP, allowing cells to perform various vital functions.

Learn more about ATP here,

https://brainly.com/question/897553

#SPJ11

Answer: 115

Explanation: Given ,

    Half life of Strontium-90 = 28.8 years.

     Number of count sample(s) = 5

    Decay Sample counts  (d)= 0.3125

    Time taken for a 5-count sample to decay 0.3125 =?

    1 - First calculate (d/s) i.e (0.3125/5) = 0.0625.

   2- since its half life (1/2)^n  i.e (1/2)^n = 0.0625

     n log 0.5 = log0.0625

    n = (log0.0625/0.5) = 4.

    (1/2)^4 =(1/16)=0.0625 =>28.8 times 4 i.e 115.2 years.

   find more at : https://brainly.in/

   #SPJ4

Answer: The mass of oxygen in 25.0 grams of potassium permanganate, KMnO4 is 10.13 grams. molar mass of KMnO₄ = 39 + 55 + 16(4).

Explanation:hope this helps ^^ have a good day xlXCherryColaXlx..(pls mark me brainliest)

To determine the mass of oxygen in 25.0 grams of potassium permanganate (KMnO4), we need to consider the molar mass and the ratio of oxygen atoms in the compound.

Molar mass is a term used in chemistry to denote the mass of one mole of a substance. It is expressed in grams per mole (g/mol). Molar mass is calculated by summing up the atomic masses of all the atoms in a molecule, as indicated by its chemical formula.

The molar mass of potassium permanganate (KMnO4) can be calculated as follows:

Molar mass of K = 39.10 g/mol

Molar mass of Mn = 54.94 g/mol

Molar mass of O = 16.00 g/mol (since there are 4 oxygen atoms in KMnO4)

Molar mass of KMnO4 = (39.10 g/mol) + (54.94 g/mol) + (4 * 16.00 g/mol)

= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol

= 158.04 g/mol

Now, we can calculate the mass of oxygen in 25.0 grams of KMnO4 using the molar mass and the molar ratio:

Mass of oxygen = (Molar mass of O / Molar mass of KMnO4) * Mass of KMnO4

= (4 * 16.00 g/mol / 158.04 g/mol) * 25.0 g

= (64.00 g / 158.04 g) * 25.0 g

= 0.4052 * 25.0 g

= 10.13 g (rounded to two decimal places)

Therefore, the mass of oxygen in 25.0 grams of potassium permanganate (KMnO4) is approximately 10.13 grams.

Learn more about potassium permanganate at:

https://brainly.com/question/31384813

#SPJ2

Answer:

true :)

Explanation:

Answer:

Yellow, Purple

Explanation:

5. The law of conservation of mass essentially states that the total 'mass' that you started with equals to the total 'mass' at the end. Take the burning of a tree, for example. Although the tree loses mass, the mass of carbon dioxide and other molecules increases proportionally to the rate of tree mass loss. Abiding by this law in a chemical reaction, we should expect the amount of shapes on each side to be equal, although they may not necessarily be in the same form. This is only shown in the 'Yellow' square.

6. We want the same amount of stuff on the left as we do on the right. There is 2 Nitrogen and 2 Hydrogen on the left. There is 1 Nitrogen and 3 Hydrogen on the right. To balance these amounts out, we'd need to multiply a few things:

1 Nitrogen by 2 on the right to make things even, meaning that now there is 2 Nitrogen and 6 Hydrogen on the right. To balance this out on the left, we need to multiply the 2 Hydrogen by 3 to yield 6 Hydrogen.

As such, the new equation is N2+ 3H2 --> 2NH3.

Do we have the same amount of stuff on the left as we do on the right? Yes! So the equation is balanced.

Mercury is a good electrical conductor due to its unique atomic structure. It is a metal that exists in liquid form at room temperature.

Mercury has 80 electrons, with 2 in the innermost shell, 8 in the second shell, 18 in the third shell, 32 in the fourth shell, 18 in the fifth shell, and 2 in the sixth shell. The electrons in the outermost shell of an atom are known as valence electrons. In the case of mercury, there are two valence electrons.T

he valence electrons of mercury are not tightly bound to the nucleus of the atom. As a result, they are free to move around the liquid's surface, allowing electric current to flow freely through the metal.

Learn more about valence electrons at:

https://brainly.com/question/9856030

#SPJ11

Answer:

Dmitri Mendeleev

Explanation:

Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts proved to be correct

Answer:

Mendeleev periodic table

Explanation:

In 1869, just five years after John Newlands put forward his

Law of Octaves, a Russian chemist called Dmitri Mendeleev

published a periodic table. Mendeleev also arranged the

elements known at the time in order of relative atomic mass

Using the specific heat capacities of water and ice, and taking into account the latent heat of melting for ice, we can calculate that the final temperature of the mixture will be 17.6 °C.

The negative value of the amount of heat lost by liquid water is equal to the amount of heat absorbed by the ice. The equation for calculating the amount of heat needed to change the temperature of a material looks like this:

Q = (t₂ - t₁) * c * m

t₂ - final temperature

t₁ - starting temperature (32.1 °C for water, -20.0 °C for ice)

c - specific heat capacity (4.186 J/g°C for water, 2.108 J/g°C for ice)

m - the mass of the material (325 for water, 44.0 for ice)

In addition, we have to take into account that some of the heat released by water is expended on melting the ice:

heat used for melting = m * l = 44.0 g * 334 J/g = 14696 J

l = latent heat of melting ice

This means that the heat released by water is expended on heating ice to 0°C, then melting that ice, then heating the ice water to the final temperature.

Heat expended by water:

Q = (32.1 °C - X) * 325 g * 4.186 J/g°C = 43670.445 J - 1360.45 J/°C * X

Heat absorbed by ice and ice water:

Q = 20.0 °C * 44.0 g * 2.108 J/g°C + 14696 J + X * 44.0 g * 4.186 J/g°C = 16551.04 J + 184.184 J/°C * X

These amounts of heat are equal:

43670.445 J - 1360.45 J/°C * X = 16551.04 J + 184.184 J/°C * X

27119.405 J = 1544.634 J/°C * X

X = 27119.405 J / 1544.634 J/°C = 17.6 °C

You can learn more about specific heat capacity here:

brainly.com/question/28302909

#SPJ4

Explanation:

Atoms are tiny spheres that cannot be divided

CaBr2 is an ionic bond. This is because the calcium gives up an electron to each of the chlorine atoms resulting in the calcium becoming Ca2+ ions...

Answer:

Q

Explanation:

Answer:

Q

Explanation:

I just took it on ed

A 250 gram sample of water at the boiling point had 64.0 kj of heat added.  19.95 grams is the mass of water were vaporized.

The total quantity of matter that makes up every object or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a seat on your bed, a baseball bat, a glass, and the very air. The mass of a thing determines whether it is light or heavy.

45 kJ / 40.6 kJ = 1.1 moles

1.1 moles x 18 g per mol = 19.95 grams vaporized

Therefore,  19.95 grams of water were vaporized.

To know more about mass, here:

https://brainly.com/question/28704035

#SPJ4

The standard potential of a galvanic cell where x is the anode and y is the cathode can be determined using the equation E°cell = E°cathode - E°anode, where E°cell is the standard cell potential, E°cathode is the standard reduction potential of the cathode, and E°anode is the standard oxidation potential of the anode.

The standard potential is a measure of the tendency of the cell to produce a flow of electrons. A positive standard cell potential indicates that the cell will produce a flow of electrons from the anode to the cathode. The magnitude of the potential is dependent on the specific electrode materials and conditions of the cell.
The standard potential of a galvanic (voltaic) cell is determined by the difference in standard reduction potentials between the anode (X) and the cathode (Y). In this cell, X undergoes oxidation, losing electrons, while Y undergoes reduction, gaining electrons. The standard cell potential (E°cell) can be calculated using the formula:
E°cell = E°cathode - E°anode
Here, E°cathode is the standard reduction potential of Y and E°anode is the standard reduction potential of X. To find the values for X and Y, refer to the standard reduction potential table. A positive E°cell indicates a spontaneous reaction, while a negative value implies non-spontaneity.

To know about potential:

https://brainly.com/question/28300184

#SPJ11

Answer: A

Explanation:

i just took the quiz and it was right!

Answer and Explanation:

The lesson about the uniqueness of the earth allowed me to realize that the earth is the only planet that has drinking water and oxygen, thus allowing the existence of life on the planet and showing that we would not fully survive on another planet.

The lesson also shows that the earth is the only planet where rotation is capable of causing seasonal differences in different parts of the globe. This is important for several things, including food production and plant growth.

Another factor that shows the uniqueness of the land is its favorable temperature for life, allowing us to have water and to be able to live outdoors, for example. This factor is worrying, since the holes in the ozone layer have caused changes in this temperature.

I was also able to learn about the gravity of the earth, which is the only thing that allows us to do all the activities we do and allows us not to be launched into space. In addition, gravity has a strong influence on seas and agriculture.

Finally, I was able to learn about the tectonic plates, which provide the movement of our crust and influence in several geological processes.

To determine how much of solution A would be needed to generate the electrical energy used daily in the home

we need to calculate the ratio of the energy released by fusion of hydrogen to the electrical energy used daily.

Energy ratio = Energy released by fusion of hydrogen / Electrical energy used daily

Energy ratio = (8.4 x 10^12) / (3 x 10^8)

To simplify the calculation, we can convert the values to scientific notation with the same exponent:

Energy ratio = (8.4 / 3) x (10^12 / 10^8)

Energy ratio = 2.8 x 10^4

This means that for every unit of electrical energy used daily in the home, we would need 2.8 x 10^4 units of solution A to generate that energy.

Therefore, to generate the electrical energy used daily in the home, we would need 2.8 x 10^4 liters of solution A.

To learn more about  solution

https://brainly.com/question/25326161

#SPJ11

Answer:

3.

D. Philippine Atmospheric, Geophysical and Astronomical Services

Administration (PAGASA)

Explanation:

4.C. 62.0 kph

3) The agency that tracks the activities of typhoon that enters PAR is; D. Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)

4) The speed of the typhoon is; C: 62 kph

3) PAR simply means Phillipines Area of responsibility.

Now this PAR is an area located at the Northwestern Pacific and it is the place where the Philippines' national meteorological agency called Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) usually monitors the weather occurrences.

This means that the typhoons that enter PAR would also be monitored by PAGASA.

4) we are given;

Distance of Typhoon Grasya from Bislig city; d = 186 km

Time at which landfall is expected; t = 3 hours.

Formula for speed is;

Speed = distance/time

Speed = 186/3

Speed = 62 kph

Read more about activities of meteorology at;https://brainly.com/question/11857753

Answer:

We in daily life use technology to pay virtually through virtual wallets, work at home, purchase packages to travel abroad, many businesses handle virtual advertising, that is why it is called the new "market window" to social networks or internet pages, university universities playful methods through virtual campuses or virtual classes.

The serious impact is very great since many of the activities of daily life change, and they will return to being as before the technology affected in our lives, reversing customs and technological generations.

The new technologies are: computer science, engineering, arquetectonica, scientific, industrial, commercial ... Where a fourth industrial revolution arises where many processes that were carried out by humans today would be automated by computers or technological devices that improve market efficiency, of consumption and industrialization.

Explanation:

In addition, new technologies are those that are based on electronic devices that are based on social communication, the development of social networks and technology based on global communications.

Answer:

Dogs devote lots of brain power to interpreting smells. They have more than 100 million sensory receptor sites in the nasal cavity as compared to 6 million in people, and the area of the canine brain devoted to analyzing odors is about 40 times larger than the comparable part of the human brain.

Explanation:

How do I explain this? Just read it out in my head and wrote it here.

Molar mass of oxygen = 32 g/mo is the ratio of the rate of diffusion of an unknown gas to oxygen is 0.85.

Oxygen is a chemical element with an atomic number of 8 (it has eight protons in its nucleus). Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures. Four representations chemists use for molecular oxygen.

We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat.

To know more about oxygen visit

https://brainly.com/question/24248083

#SPJ4

Answer:The earths plates shifting

Explanation: The movement releases stored-up 'elastic strain' energy in the form of seismic waves, which propagate through the Earth and cause the ground surface to shake.

Answer:

1) line graph

2) temperature

3) 260 to 330

Explanation:

Edge 2020

Answer: 50-70

Explanation:

Got it right on edge 2020