Anyone knows this please help me

Answer:

Explanation:

In an ionic bond, atoms transfer electrons in order to achieve a stable electron configuration, also known as a full valence shell. The number of electrons transferred from one atom to another can be determined by the difference in their electron configurations.

In the example of lithium and chlorine forming an ionic bond, lithium (Li) has one valence electron and chlorine (Cl) has seven valence electrons. In order for both atoms to achieve a stable electron configuration, Li would transfer its one valence electron to Cl. This results in the formation of two ions: Li+ and Cl-.

It is important to note that for a reaction to be ionic, it must involve the transfer of electrons from one atom to another. In the case of Lithium and Chlorine it is ionic because electrons are transferred from Li to Cl.

(a)- Time

(b)- Heat produced(i guess)

(c)- Material

this is what I think, hope it helps

To keep the data private from the public, the user should use the c)eye icon.

The Eye icon helps users to keep their visualizations private from other users. When clicked, it makes the visualization inaccessible to other users.

This helps ensure that the visualization is only visible to the user who created it and not to anyone else. Additionally, the Eye icon also helps prevent accidental deletion or modification of the visualization.

When the visualization is private, it is not visible to other users until the Eye icon is clicked again to make the visualization public. This makes it easier for the user to control who can access their visualization and helps protect their data.

Therefore, the correct option is c and the icon is the eye.

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Answer:

2.66 · 10⁵

Explanation:

There are 1440 minutes in a day. Which means that there is 266400 minutes in 185 days. And in scientific notation it is: 2.66 · 10⁵.

The balanced equation for the beta emission decay of iodine-126 is as follows:

Decay process in nuclear reactions refers to the spontaneous transformation of an unstable nucleus into a more stable one, emitting one or more particles or radiation in the process.

The types of decay include

This process results in a decrease in the total number of protons and neutrons in the nucleus and a decrease in the total atomic number and mass number of the nucleus.

In the equation, the beta particle is an electron emitted from the nucleus during the decay process.

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Answer:

Option 2: temperature and volume

Explanation:

took the test

Temperature and volume are the variables for this piston.

Temperature is a measure of hotness or coldness

The volume of a gas is directly proportional to its absolute temperature. More specifically, for a fixed mass of gas at constant pressure, the volume (V) is directly proportional to the absolute temperature (T).

This is Charles' Law. V = kT, where k is a proportionality constant.

Hence, temperature and volume are the variables for this piston.

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Answer:

V2= 531.4 ml

Explanation:

T1= 273+45 °C= 318 Kelvin

T2= 273+65 °C= 338 Kelvin

V1= 500ml *( 0.001L/1ml)= 0.5 Liters

V2= \(\frac{V1 * T2}{T1}\)= \(\frac{0.5 L * 338K}{318K}\) = 0.5314465409 Liters* (1 ml/0.001 L)= 531.4 ml

Answer: See explanation

Explanation:

1. Separation of charges in an object without touching it is (charging by induction).

2. The work done moving a positive test charge between two points in an electric field divided by the magnitude of the test charge is the electric (potential difference).

3. An electric (conductor) is a material through which charges move about easily. (Charging by conduction) is giving a neutral object a charge by touching it with a charged object.

4. A material through which electrical charges does not move easily is an electrical (insulator).

5. The lines providing a picture of the size and strength of the field around a charged object are called the (electric field lines).

6. The property of the space around a charged object that exerts a force on other charged objects is the (electric field).

7. A device that helps determine charge using pieces of metal foil is an (electroscope).

8. The magnitude of the charge of an electron is the (elementary charge)

Answer:

1.) plastics are poor conductors of heat and electricity

2.) plastics are non reactive metals they are not attacked by chemicals

3.) plastics are lightweight strong and durable

4.) plastics can be moulded and dyed easily in many colours like orange, pink ,sky blue , red, green, and e.t.c

the four uses of plastics are:

1.) bakelite is used to make electric switches insulating casings and handle of cookware and tools

2.) melamine is heat resistant and is used to make kitchenware , floor tiles and special suits for firefighters

3.) Teflon is used as a non stick coating on cookware as both water and oil do not stick to it

4.) many plastics are waterproof and therefore

they are used to make Water bottles and waterproof containers

Explanation:

Search it up bro :')

The four properties of plastics are malleability, longevity, cheapness, and poor conductivity.

Plastics are generally very malleable and can be molded into different shapes very easily. Different types of plastics have different melting points, which enables them to be shaped into different shapes and make objects.

Plastics are generally very durable and have a long shelf life. That is the reason why plastics are used to make things that go through a lot of wear and tear. A negative aspect of this is that plastics, when exposed to natural processes of degradation, do not break down easily and harm the environment.

Plastics are usually cheap and can be obtained at a very less price. This helps people afford goods made out of plastic and also reduces the production cost of the goods.

Plastics are generally very poor conductors of heat and electricity. This means that they do not conduct heat and electricity very well, which is why they are used as insulators and wire coverings.

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Answer:

Dalton based his theory on the law of conservation of mass and the law of constant composition.

The first part of his theory states that all matter is made of atoms, which are indivisible.

The second part of the theory says all atoms of a given element are identical in mass and properties.

The third part says compounds are combinations of two or more different types of atoms.

The fourth part of the theory states that a chemical reaction is a rearrangement of atoms.

Explanation:

Answer:d stay the same as well

Explanation:

sorry if im

wrong

If either allele is a dominant allele for a trait, the organism will exhibit that trait. An organism will express a recessive trait only when both alleles are recessive.

Alternative gene forms are known as alleles. On a certain chromosome, it is situated at a specific position. Sexual reproduction is the means by which the alleles are transmitted from parents to children. These genes are a class of genetic material that codes for a particular characteristic of an organism.

An area on a chromosome known as a gene locus is where each allele is located. The two copies of the gene, one inherited from each parent, are found in the same area on two homologous chromosomes. Dominant or recessive alleles are both possible.

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The complete question is:

If either allele is the allele for a trait, the organism will exhibit that trait. An organism will express the recessive trait only when             are recessive

Answer:

ok

Explanation:

Answer:

A solution is made when a substance called the solute "dissolves" into another substance called the solvent.

Explanation:

Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules.

Answer:c

Explanation:

Answer:

1 ppm :)

Explanation: i was guessing and 1 ppm was the answer :)

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

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Answer:

Dependent variables are those that need a stimulus to present themselves. The independent variables are those that do not need a stimulus to present themselves and the control variables are the elements that remain unchanged throughout the experiment.

Importance of variables

They present the relationship between the elements of the experiment.

Allow hypotheses to be tested.

Allows comparisons between experimental treatments.

They encourage the evaluation of experimental data.

To increase the understanding of these variables, we can use as an example an experiment that seeks to evaluate the influence of root growth of transgenic corn with water stress. In this experiment, five plants of transgenic corn will suffer different levels of water stress, while one plant of the same corn will not suffer this stress and will be watered normally.

According to this, root growth is a variable that needs a stimulus to present itself, so this is the dependent variable. Water stress does not need any stimulus, being the independent variable. Finally, the corn plant that will not suffer any type of stress will remain unchanged throughout the experiment, being the control variable.

You didn't show the experiments your question refers to, which prevents me from providing an exact answer, but I hope the information above can help you.

Explanation:

The correct option for the process used to refine aluminum from its bauxite ore is option D.

D. Smelting

The reason why smelting is the correct choice is as follows;

Bauxite is the aluminum ore from which alumina, also known as aluminum

oxide, Al₂O₃, is produced. Bauxite is extracted from the topsoil regions of

some subtropical and tropical regions, and the Bayer process is primarily

then used to produce alumina from the bauxite.

Aluminum is produced from the alumina by an aluminum smelting process

known as the Hall—Heroult electrolytic process which involves the use of a

carbon anode and direct current to produce aluminum by reducing the

aluminum oxide

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Answer: -162,120J

Explanation:

Okay, so q stands for work, given by the formula q = -P∆V,

For the first round, we have 2atm (for P) and a volume change of 3.2 (6.4-3.2) for the first experiment.

Find the work: q = -2 • (3.2 - 6.4) = 6.4L/atm

For the second experiment, it is now 2.5atm, with the change in volume going from 3.2 to 2.56.

So, work is q = -2.5(2.5 - 3.20) = 1.6L/atm

Add the total work: 1.6 + 6.4 = 8L/atm

To find the Joules per L/atm, recall that a mol of gas in K is 8.31447J, while the gas constant where a liter of gas per mol in K is 0.08206L/atmK. Divide these two values, which leaves us with 101,325J

So, for the first round, multiply 8 x 101,325, which leaves us with 810,600J.

Second round: The pressure is 2.5atm, with the volume change from 6.40 to 2.56

Solve for work: q = -2.5(2.56-6.4) = 9.6L/atm

Multiply with the Joule unit found earlier: 9.6 x 101,325 = 972,720J.

To find the difference, subtract the value of the single-step process (second round) from the first round (multistep)

810600 - 972720 = -162,120J. Therefore, it takes more heat to do the single step than the multistep process.

a. 13.25 g

b. 3 L

Given

21 g of Sodium hydrogencarbonate

Reaction

2 NaHCO3 (s) → Na2CO3 (s) + H2O(l) + CO2(g)

Required

mass of residue

volume of CO2

Solution

mol  NaHCO₃ (MW=84 g/mol) :

\(\tt mol=\dfrac{21}{84}=0.25\)

a. the residue = Na₂CO₃

From the equation, mol ratio NaHCO₃ : Na₂CO₃ = 2 : 1, so mol Na₂CO₃ :

\(\tt \dfrac{1}{2}\times 0.25=0.125\)

mass Na₂CO₃ (MW=106 g/mol) :

\(\tt mass=0.125\times 106=13.25~g\)

b. From equation, mol CO₂ = 0.5 x mol NaHCO₃ = 0.125

RTP= 25 C, 1 atm ⇒ 1 mol =24 L

So volume CO₂ :

\(\tt 0.125\times 24=3~L\)

To keep burning, fires require oxygen. Carbon dioxide is used in certain fire extinguishers to put out flames. Explanation: Because magnesium is higher on the reactivity scale than carbon, it is more reactive and eliminates oxygen from carbon dioxide (to give carbon and magnesium oxide).

[Ar]4s23d6 the electron configuration of the metal ion in Fe(NO3)3.

The noble gas krypton, which is isoelectronic with As arsenic 3 ion (As3), is isoelectronic with [Ar]3d104s2sp6 because it has gained three electrons.

Transition-metal ions are frequently referred to as having dn configurations because their valence electrons are mostly found in d orbitals. For instance, it is claimed that the Co3+ and Fe2+ ions have a d6 configuration.

The number of protons in the atomic nuclei of arsenic, abbreviated As, is 33. 33 electrons would likewise be present in a neutral As atom.

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Answer:

N2O3= Dinitride Trioxide

CO= Carbon Oxide

SO3= Sulfide Trioxide

Explanation:

Di= 2

Tri= 3

1.8 is the pH during the titration of 20.00 mL of 0.1000 M HCOOH (formic acid) with 0.1000 M NaOH (aq) after 19.55 mL of the base have been added

This can be calculated using the equation below:

pH = -log10([H+])

Where [H+] is the concentration of H+ ions, given by the formula:

[H+] = Ka * [HCOOH] / (Ka + [NaOH])

Ka is the acid dissociation constant of formic acid, which is 1.7 × 10-4.

Using the above equation and data, we can calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH with 0.1000 M NaOH after 19.55 mL of the base have been added as follows:

[H+] = 1.7 x 10-4 * 0.1000 / (1.7 x 10-4 + 0.1000) = 0.0156 M

Therefore, pH = -log10 (0.0156) = 1.8

Hence , the pH during given titration is 1.8 .

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Answer:  the vibration becomes faster

Explanation:

Answer

F) The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.

Explanation

Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases. He discovered that doubling the pressure of an enclosed sample of gas, while keeping its temperature constant, caused the volume of the gas to be reduced by half.