The statement that correct are a, c and d, which are saying, "Ionic bonds are generally formed when a metal bonds with a non-metal"; "Na+ and Cl- share electrons to form a stable compound. and Na loses an electron to form the cation Na'.
The chemical bond that is formed when the complete sharing of electrons take place, is called a Ionic bond.
Generally, metals loses and electron and non-metals tend to gain an electron. This is why Ionic bonds are usually formed between metals and non-metals.
The ionic bonds are formed when sharing of electron takes place not only by the attraction.
Na⁺ and Cl⁻ shares electrons to form bonds, this statement is true.
Also, the statement saying that Na⁺ cation is formed by the losing of one electron by Sodium. It is true.
Because sodium is a metal, it loses an electron and chlorine is a non-metal, it gains an electron so that they both can form a bond between the, share there electrons and form a stable compound.
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.need this answer asap
In gases, the particles travel quickly in all directions and regularly collide with one another and the container wall. The particles acquire more kinetic energy and accelerate with rising temperature.
What are gas particles ?There is not much attraction between the particles in a gas. In comparison to the particles in a solid or liquid, they are extremely widely apart and are always moving. The particles simply strike and bounce off of one other when they collide, without engaging in any interaction.
There is no regular structure and the particles in a gas are well separated. Despite having no regular arrangement, fluids are close to one another. Typically in a regular pattern, solids are densely packed.Learn more about Gas particles here: https://brainly.com/question/16982523
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Which of the following quantities are required for calculating density? Select all that required.
Volume
Area
Mass
Weight
Answer:
Mass and Volume
Explanation:
The formula for density is
[tex]\frac{Mass}{Volume}[/tex]
Air at 30,000 feet is at a temperature of -35.0 C. A sample of air was collected and the mixture is 75.56% nitrogen 23.15% O2 and 1.29% Ar if .594 moles of air are captured in a 45.0 L container from the plane
Calculate the total pressure
Calculator the partial pressures of each gas
Answer:
hope this help
Explanation:
Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.
What is partial pressure?Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.
Recognize that pressure refers to "total" pressure, meaning that all of the mixture's gases contribute to the overall pressure. Since each gas acts as a separate entity, the concept of partial pressure is developed from this. contributes to the overall pressure in a given proportion, which corresponds to its partial pressure.
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Determine the mass in grams of 5.90 × 10²¹ atoms of barium. (The mass of one mole of barium is 137.33 g.)
Taking into account the definition of Avogadro's Number, the mass of 5.90×10²¹ atoms of barium is 1.345 grams.
Avogadro's NumberAvogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.
Avogadro's number applies to any substance.
Mass of bariumYou can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of barium, then 5.90×10²¹ atoms are contained in how many moles of barium?
amount of moles of barium= (5.90×10²¹ atoms × 1 mole)÷ 6.023×10²³ atoms
amount of moles of barium= 9.796×10⁻³ moles
Then it is possible to apply the following rule of three: if 1 mole of barium contains 137.33 grams, 9.796×10⁻³ moles of barium contains how much mass of barium?
mass of barium= (9.796×10⁻³ moles× 137.33 grams)÷ 1 mole
mass of barium= 1.345 grams
In summary, the mass is 1.345 grams.
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enough of a monoprotic acid is dissolved in water to produce a 1.16 m solution. the ph of the resulting solution is 2.73 . calculate the ka for the acid.
The acid dissociation constant (Ka) for the acid is calculated to be 2.9 × 10^-6 M if the pH of the resulting solution is 2.73
The acid dissociation constant (Ka) is used to differentiate between weak and strong acids and in this case, can be calculated as follows;
Considering the chemical reaction:
HA ⇄ H⁺ + A⁻
Here HA is the acid that disassociates into the conjugate base of the acid (A⁻) and a hydrogen ion represented as H⁺
As the molarity of monoprotic acid is 1.16 M and the pH of the solution is 2.73, therefore;
[A⁻] = [H⁺] = 10^(-2.73)
[A⁻] = [H⁺] = 0.00186 M; equilibrium concentration
[HA] = 1.16 M - 0.00186 M
[HA] = 1.15814 M
Ka = [A⁻][H⁺] / [HA]
Ka = (0.00186)² / 1.15814 M
Ka = 2.9 × 10^-6 M
Therefore the Ka for the acid is calculated to be 2.9 × 10^-6.
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convert a length of 3450 um to dm
When we convert a length of 3450 micrometers to decimeters it would come out to be 3.45 × 10⁻⁴ decimeters .
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind.
1 micrometer = 1 × 10⁻⁶ meters
3450 micrometers = 3450 × 10⁻⁶ meters
1 meter = 10⁻¹ decimeters
3450 × 10⁻⁶ meters =3450 × 10⁻⁶ × 10⁻¹ decimeters
=3.45 × 10⁻⁴ decimeters
Thus, 3450 um converted into dm would be 3.45 × 10⁻⁴ decimeters.
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07:48
Above is an example of a food chain or pyramid. Ultimately, either directly or indirectly all organisms on this food chain get their energy from what single source?
A The earth.
B The snakes.
C the Plants.
D The sun.
Answer:
D
Explanation:
Plants manufacturer food through photosynthesis which depends on sunlight
I NEEED HELP on science air resistance
Answer:
Air resistance, which is also known as drag, is a kind of friction (a force that opposes motion) which occurs between air and another object. It is the force that the object experiences as it passes through the air. Air resistance and gravity are the two fixed forces of nature which move on any object on Earth.
ionizing an h2 molecule to h2 changes the strength of the bond. based on the description of covalent bonding given previously, do you expect the h¬h bond in h2 to be weaker or stronger than the h¬h bond in h2?
From the fact that the bond order would reduce from one to 0.5, it shows that the ionized specie is weaker than the hydrogen molecule that has not yet been ionized.
What is the bond strength?The term bond strength has to do with how strong the bond that holds two atoms together is. We know that the stronger the bond, the more difficult it would be to break the bond by whatever means.
In this case, we are told that when we ionize the hydrogen molecule, the strength of the bond is changed. This implies that the bond would become weaker as the bond order of the specie would reduce from one to 0.5.
Also, the lesser the bond order, the weaker the molecule is. It then follows that the hydrogen molecule that has not been ionized with a bond order of one has a stronger bond than the ionized specie that has a bond order of 0.5.
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I give you 20 pts if you can help me out, thx ahead of time, its really appreciated :3
Restate Rutherford's hypothesis and describe how you tested it.
Rutherford's gold foil experiment proved that an atom is mostly empty space with a tiny, dense, positively-charged nucleus.
What is Rutherford's gold foil experiment?Rutherford's gold foil experiment is defined as the positive-charged alpha particles struck a piece of gold foil. Most alpha particles passed through unharmed it has been observed that electrons are revolving around the nucleus.
Rutherford reasoned that the mass of the atom was distributed across the atom if Thomson's model was accurate.
Thus, Rutherford's gold foil experiment proved that an atom is mostly empty space with a tiny, dense, positively-charged nucleus.
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The element x has three naturally occurring isotopes. the masses (amu) and bundances of the isotopes are given in the table below. the average atomic mass of the element is ________ amu.
Isotope Abundance(%) Mass(amu)
15X 28.6 15.33
17X 13.3 17.26
16X 58.1 18.11
A. 17.20
B. 16.90
C.17.65
D. 17.11
The average atomic mass of the element is 17.20 amu. This is calculated using the relative abundances and atomic masses of its isotopes.
In order to calculate the average atomic mass of the element, we need to multiply the relative atomic mass of each isotope by its abundance, and then add them up.
So, for isotope ¹⁵X:
15.33 amu * 0.286 = 4.38 amu
For ¹⁷X:
17.26 amu * 0.133 = 2.30 amu
And for ¹⁸X:
18.11 amu * 0.581 = 10.52 amu
Now, finally, we add these up to get the average atomic mass of element X:
4.38 amu + 2.30 amu + 10.52 amu = 17.20 amu
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The amino acid alanine, CH3CH(NH2)CO2H, has a chiral centre. Illustrate both forms of this isomer and identify the type of isomerism shown.
Two form of isomer shown by Alanine amino acid is
a) L- alanine
b) D- alanine
Type of isomerism shown is Stereoisomers.
Amino acids are molecules that combine to form proteins. Amino acids and proteins are the constructing blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to assist the body.
Amino acids are required for the synthesis of body protein and other important nitrogen-containing compounds, which include creatine, peptide hormones, and some neurotransmitters. Despite the fact that allowances are expressed as protein, a the organic requirement is for amino acids.
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Which chemical property of alkanes is responsible for generating electricity in diesel
power stations or for moving motor vehicles?
Alkanes' comparatively low reactivity, which is a chemical property, is what allows diesel to produce energy. Strong acids, bases, oxidising, or reducing agents do not react with alkanes (reductants). Alkanes can be used as fuels because they burn quickly when exposed to oxygen and release energy.
What is Chemical property?
Any quality that can only be formed by altering a substance's chemical identity is referred to as a chemical property, and it can occur during or after a chemical reaction. Simply put, it is impossible to detect a substance's chemical properties by looking at it or feeling it; instead, a substance's internal structure needs to be significantly altered before its chemical qualities can be examined. A substance's properties will alter significantly as a result of a chemical reaction, leading to chemical change. A catalytic property, on the other hand, would also be a chemical property.
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According to collision and transition state theories, what is the importance of activation energy?
A) Activation energy is increased when a catalyst is added.
B) Activation energy increases the temperature to heat up the transition state.
C) Activation energy provides enough energy for reactants to form the transition state.
D) Activation energy makes all reactions endothermic.
Which of the following best shows the basic three-step energy transformation for a battery-operated radio?
Responses
Acoustical → Mechanical → Electrical
Acoustical → Mechanical → Electrical
Mechanical → Acoustical → Chemical
Mechanical → Acoustical → Chemical
Chemical → Electrical → Acoustical
Chemical → Electrical → Acoustical
Electrical → Acoustical → Chemical
The energy transformation takes places in a battery operated radio is chemical energy to electrical energy then to sound energy or acoustical. Thus, fifth option is correct.
What is energy transformation?Energy can be transformed from one form to the other, For example, when we produce current from solar cells there occurs the transformation of light energy to electrical energy.
A battery contains two electrodes immersed in a molten electrolyte. When a potential difference is applied between these electrodes one of the electrode undergo reduction and the second one to oxidation.
The chemical energy produced from the electrolyte produce current and thus the energy is transformed to electrical energy. Using this electrical current the radio produces sound energy.
Therefore, the basic three- stage energy transformation for a battery operated radio is chemical energy to electrical energy then to sound energy or acoustical hence, fifth option is correct.
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How is chemical weathering different from physical weathering?(1 point)
Chemical weathering involves plants and animals, while physical weathering does not.
Chemical weathering requires a reaction with water, while physical weathering does not.
Chemical weathering forms new substances, while physical weathering does not.
Chemical weathering results in the breakdown of rock, while physical weathering does not.
Chemical weathering different from physical weathering because chemical weathering results in the breakdown of rock, while physical weathering does not
Chemical weathering involve the interaction of rock with minerals solution to change the composition of rock in this process water interact with minerals to create various chemical reaction and transform the rock and physical weathering is the process that cause disintegration of rock, minerals soil without chemical change that's why chemical weathering different from physical weathering because chemical weathering results in the breakdown of rock, while physical weathering does not
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hich option is an ionic compound?
Responses
NO2
upper case N O subscript 2 end subscript
SO3
upper case S O subscript 3 end subscript
CO
upper case C O
LiCl
NO₂ , SO₃ and CO are covalent compounds and LiCl is ionic in nature.
What are differences between covalent and ionic compounds?The definition of an ionic compound is chemical compound composed of ions which is held together by electrostatic forces i.e. held together by ionic bonds. They are formed by ions of opposite charge. The compound is neutral but it consists of a positively and negatively charged cations and anions.
Ionic bonds transfer electrons, covalent bonds share them more easily .Ionic compounds tend to have higher melting points and boiling points while covalent compounds have lower melting & boiling pointsIonic compounds have more polar molecules and covalent compounds lessOrganic compounds tend to have covalent bondsIonic compounds are usually between metal and a non-metal. Non-metal with non-metal compounds are covalent.Ionic compounds have ions in solution or in molten state and conduct electricityIonic bonds are stronger than covalent bondsIonic compounds tend to be a solid with definite shape at room temperature while covalent compounds are usually gases, liquids or soft solidsIonic compounds often do not dissolve in organic solvents while covalent compounds do.Learn more about ionic compounds at https://brainly.com/question/2687188
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The process by which blank capture blank energy to convert blank and blank into blank and blank thereby storing some of the captured energy in chemical blank
The process by which autotrophs capture light energy to convert carbon dioxide and water into glucose and oxygen thereby storing some of the captured energy in chemical energy.
An autotroph is an organism that could produce its very own meals with the use of light, water, carbon dioxide, or other chemical compounds. because autotrophs produce their very own food, they're occasionally called manufacturers. plant life is the most acquainted sort of autotroph, captured energy but there are numerous unique forms of autotrophic organisms.
An autotroph or number one producer is an organism that produces complicated organic compounds using carbon from easy materials together with carbon dioxide, generally using electricity from light or inorganic chemical reactions.
Autotrophs are called producers due to the fact they may be able to make their personal food from raw substances and power. Examples consist of flowers, algae, and a few sorts of bacteria. Heterotrophs are known as purchasers due to the fact they eat manufacturers or different clients. dogs, birds, fish, and humans are all examples of heterotrophs.
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Name the chemical that is added to drinking water to kill microbes.
Answer: chlorine
Explanation:
Chlorine is a chemical that is added to drinking water to kill parasites, bacteria, and viruses.
What is chlorination?Chlorination is the addition of chlorine to drinking water to kill microbes such as parasites, bacteria, and viruses. To achieve safe levels of chlorine in drinking water, different processes can be used.
The small amounts of chlorine in drinking water do not cause harmful health effects and give protection against waterborne disease outbreaks. Chlorinated water can smell and taste differently than untreated water.
When the chlorine is dissolved in water, it converts to an equilibrium mixture of chlorine, hydrochloric acid (HCl), and hypochlorous acid (HOCl).
Taste and smell can cause problems depending upon the water quality and amount of chlorine in the water. Chlorine levels up to 4 mg/L or 4 parts per million (ppm)) are assumed safe in drinking water external icons.
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In the reaction 2H₂ + O₂ → _H₂O, what coefficient should be placed in front of H₂O to balance the reaction?
A. 1
B. 2
C. 3
D.4
Answer: B.2
Explanation: math
fire extinguishers that can be used on any type of fire, a, b, or c generally contain a to extinguish the fire. a. water b. carbon dioxide c. nitrogen d. dry chemical powder
Answer:
b? im pretty sure
Explanation:
1.write a general word equation for the reactions that occurred
2.Name another acid which can be used instead of hydrochloric acid
1. Write the name of the reactant carbonic acid Draw arrows to indicate the direction of the chemical reaction → Write the name of each product separated by a plus sign (+) to the right of the arrow carbon dioxide + water.
2. Sulphuric acid
Hydrochloric acid is also known as hydrochloric acid or hydrochloric acid. Since hydrochloric acid and hydrogen chloride are the same compounds, they have the same molecular formula HCl. However, in federal states it is different. Hydrogen chloride occurs in gaseous form at room temperature and pressure.
Dry acid is used in pools and spas to lower pH and maintain total alkalinity TA. It is safer and easier to use than hydrochloric acid. It is easy to store but requires careful handling. Hydrochloric acid and sulfuric acid are two strong acids. The main difference between hydrochloric acid and sulfuric acid is that hydrochloric acid is monobasic whereas sulfuric acid is dibasic.
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There are two types of hard water. Which type is softened by boiling?
The two types of hard water is temporary hard water and permanent hard water. Temporary hard water is softened by boiling.
What is hard water?
Hard water is known to be highly concentrated in calcium and magnesium largely due to to the ions of these elements dissolved in ground water that have the presence of these elements which could be sourced from rocks with the additional help with water from rain. A physical evidence that a water is hard water would be that it doesn't lather easily with soap.
Temporary hard water: the answer is temporary hard water as the heat from boiling would softened as the water produces calcium carbonate.Permanent hard water: this type of water doesn't break easily by heating as they contain compounds such as calcium sulphate.In summary, temporary hard water responds to heating which makes the water much more easier to be used for laundry, and drinking.
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What causes lightening? Describe each step involved in the forming of lightening. And give an example of a similar process from everyday life.
Lightening is caused by imbalance between storm clouds and ground , but most probably lightening occurs due imbalance between clouds.
What is lightening and how it occurs?We have already studied about positive and negative charges in earlier classes , about their behavior too.Positive charge and negative charge if placed on a zone share a mutual attraction behavior.Prior to lightening occurs the negative charges of the bottom of the cloud and the positive charges present on the ground attracts.When attraction attains the peak they comes closer to either discharge or to balance the charges.We hear a sound when lightening occurs and calls it thunder, actually when lightening occurs the explosion of heat creates a sound of thunder.To know more about lightening visit :
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Who first developed a mathematical expression to relate the visible wavelengths of light emitted by the hydrogen atom?.
In 1885, a Swiss mathematics teacher, Johann Balmer (1825–1898), showed that the frequencies of the lines observed in the visible region of the spectrum of hydrogen fit a simple equation that can be expressed.
As a result, these lines are known as the Balmer series. The Swedish physicist Johannes Rydberg (1854–1919) subsequently restated and expanded Balmer’s result in the Rydberg equation:
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Describing the Organization of the Periodic Table
Use the drop-down menus to complete the statements.
A vertical column of elements in the periodic table is called a
A horizontal row of elements in the periodic table is called as
Atoms of elements in the same group have the same
As you move from left to right on the periodic table, the atomic number
1) group
2) – time
3) the number of valence electrons.
(4) raises
Which element is unusable?Outside of science, Nobelium has no uses. The biological function of nobelium is unknown. Due to its radioactivity, it is poisonous. Using a cyclotron, carbon is used to bombard curium to create nobelium.
It is said that we are going along a "group" in a periodic table when we move up or down a vertical column in the periodic table.
Similarly, it is said that we are travelling along a "period" in a periodic table when we move in a horizontal row from left to right or right to left.
The total amount of valence electrons affects how an element is categorized as belonging to a particular periodic table group.
The atomic number rises as one moves from left to right since the number of valence electron orbitals also rises in the same manner.
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Please answer, I will mark brainliest
Answer:
Carbon Dioxide
Explanation:
"Carbon Dioxide is a pure substance made from two different elements so it is a compound."
Layla tested a group of fertilizers on her vegetable garden to see which would help her grow tomatoes with the greatest mass she section off her garden to test three different brands of fertilizer on for tomato garden at the same time one brand represented the one she uses all the time while the other two were knew which best explains the mistake that Lila made in her experiment?
The mistake that was made by Layla is that the experiment lacks a control.
What is an experiment?We know that an experiment is the way by which we are able to establish the cause and effect relationship between variables. We know that the whole essence of an experiment is to test the effect that the independent variable could have on the dependent variable.
In this case, we can see that there is the lack of a control variable. The control variable is what helps us to be able to ascertain the validity of the experiment and the control variable is lacking in this experiment.
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what is the maximum number of moles of p2o5 that can theoretically be made from 208 g of o2 and excess phosphorus?
The maximum amount of 2.6 moles of P2O₅ that can be produced theoretically from 208 g of O₂ and extra phosphorus.
Describe mole:An atom, molecule, or other specific material can be measured in enormous amounts using the standard scientific unit of the mole.
In the international system of units, it is also known as the material amount unit.
Briefing:P₄ + 5O₂ -> 2P2O₅
Mass of O₂ = 208g
Molar mass = 32g
So moles of O₂ = 208 / 32 = 6.5 mole
For reaction 5 mole of O₂ will give 2 mole of P2O₅
So 6.5 mole of O₂ will give
= 6.5 x 2 / 5 = 2.6 mole of P2O₅
Therefore, 2.6 moles of P2O₅ are the greatest amount that may theoretically be produced from 208 g of O₂ plus extra phosphorus.
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What is the meaning of chemical formula?
Answer:
is a way used to show the number and types of an atom in a molecules or cpd.
Chemical formula is the use of symbols of respective elements with the number of atoms present in it.
It is an easy way to recognize the elements from their symbols for easy use in the equations. In short it is the shortform of the chemical name for any compound or molecule. The number of atoms is represented numerically in subscript of the symbol of the
For example, the chemical formula for water is H2O. H is for the hydrogen atom and O is for the oxygen atom, in water there is one oxygen and two hydrogen atoms, therefore the chemical formulae will become H2O.
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