Los elementos que forman aniones con carga -1 y una capa externa estable de ocho electrones pertenecen al grupo de los: halógenos.
Para alcanzar la estabilidad, los átomos siguen la regla del octeto: ganan, pierden o comparten electrones para tener 8 electrones en su capa externa (capa de valencia).
Los elementos del Grupo 17 de la Tabla Periódica, conocidos como halógenos, tienen 7 electrones en su capa de valencia. Así, tienden a ganar 1 electrón para completar su octeto. Como los electrones tienen carga negativa, al ganar 1 electrón los aniones quedan con una carga de -1.
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1. Based on the Law of Conservation of Mass, if
100g of sodium metal reacts with 25g of
chlorine gas, what will be the total mass of the
product, sodium chloride, created in the
chemical reaction?
2 Na Cl2
2NaCl
100gm + 25gm
+
?
[tex]\boxed{\sf {Na\atop Sodium}+{Cl\atop Chlorine}\longrightarrow {NaCl\atop Sodium Chloride}}[/tex]
Na=100gCl=25g.Mass of reactants :-[tex]\\ \sf\longmapsto Na+Cl[/tex]
[tex]\\ \sf\longmapsto 100+25[/tex]
[tex]\\ \sf\longmapsto 125g[/tex]
Mass of NaCl=125g
What is the density of water (in g/mL) to fouf significant figures at 6°C?
Answer :
0.9999432 g/cm^3
The density of water in g/ml up to 4 significant figures at 6°C is 0.9999432 g/cm³.
What are significant figures?Significant figures are used for establishment of a number which is presented in the form of digits. These digits give a meaningful representation to the numbers.
The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:
1)All non-zero digits are significant .
2)All zeroes which occur between non-zero digits are significant.
3)All zeroes to the left and right of a non-zero digit are not significant.
4) All zeroes on right of decimal are significant if a non-zero number follows them.
5)All zeroes on right side of non-zero digit are significant
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What is the function of phloem tissue in the plant transport system?
A.it prepares food
B.it transports food
C.it transports water
D.it provides support
Answer:
option B is the right answer it helps in transfer of food.
Balancing oxidation-reduction reactions
Mg+ N2—>Mg3N2
Answer:
[tex]{ \sf{3Mg_{(s)} + N_{2(g)} →Mg _{3}N_{2(s)}}}[/tex]
600mL of a gas at 27◦C and 1atm pressure is heated to 177◦C. What pressure Must be applied to the gas in order to maintain the same volume?
Answer:
gkfbhs DC hdshgagfzh
Convert to standard notation.
9.3 x 10^-5
Answer:
9.3 x 10^ -5 in standard notation is 0.000093
Explanation:
Since 10 is raised to a -5, this means that there should be 5 zeros before the non-zero digits
literally anyone pls
Answer:
0.5851 g/cm3
Explanation:
(45.62) ÷ (4.272)³ = 0.5851
What does a virus inject into a cell?
Answer:
The virus's genome is uncoated from the protein and injected into the host cell.
Explanation:
Drag the appropriate answer to the correct location on the concept map below.
MAY SOMEONE HELP ME PLZZ
A tire company wants to determine what kind of rubber will last the longest for their tires. What are some variables that the researchers will want to make controlled variables?
Answer: Rubber source, temperature, thinkness, thread design, driving pattenrs, weather, etc.
Explanation: There are many variables. Here are a few I would include in a tire lifetime study:
1. Type of rubber, including source
2. Thickness of tire
3. Design of tire thread
4. Life as a function of average speed and road surface
5. Expected outside temperature and wet conditions
6. Driving conditions of speed and both acceleration and deceleration parameters (e.g., tire life when slamming on the brakes or accelerating quickly)
Which is larger?
1). 1 liter or 1500 milliliters
2) 12 cm or 12 milliliters
Answer:
1). 1 litre
2).12 cm
Explanation:
In 1 litre = 1000 ml whereas 1500 milliliters equals 0.15 litres and it is same for 12 cm and 12 milliliters
what will happen to the atoms or sbstance when it is condenses
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.
Hope it helps!
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difference between Ammonia and ammonium..
plz do not scam
Would you categorize temperature as an Intensive or extensive property explain plz !!!
Extensive properties depend on the amount of matter in a sample, While Intensive properties do not depend on the amount of matter in a substance.
~What should a prepositional phrase include after the preposition?
A.a noun and its modifiers
B.an adjective and an adverb
C.a subject and a predicate
D.an object and its modifiers
Answer:
B
Explanation:
A prepositional phrase should include after the preposition an object and its modifiers. The correct option is D.
What are prepositional phrases?A prepositional phrase is a group of words that contain a preposition with its object and the words that modify it. These are the words that change verbs and nouns.
For example, Mansi is going out with handsome Brian. Brian is the object and the beautiful is the prepositional phrase. The three types of prepositional phrases are:
Adverb prepositional phrases.Adjective prepositional phrases.Prepositional phrases, behave as nouns.If there are two prepositional phrases used in one sentence. The other prepositional phrase will be used as an adverb.
Thus, the correct option is D. an object and its modifiers.
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GIVING 20 POINTS!! Apply Concepts Two chemists each plan an investigation in which they will combine hydrogen gas with chlorine gas to observe the chemical reactivity. The plans differ in that one will use 25 milligrams each of hydrogen and chlorine, and the other will use 1000 times this amount, i.e., 25 grams each of hydrogen and chlorine. Can the investigations reach similar conclusions about the reactivity of hydrogen with chlorine? Explain.
Answer:
Yes, the investigations will reach similar conclusions about the reactivity of H2 and Cl2
Explanation:
1. The law of multiple proportions says that when elements form compounds, the proportions of the elements in those chemical compounds can be expressed in small whole number ratios. This means that regardless of whether 1000 times more of the products are used, the reactivity of the products is established by the chemical reaction
2. The law of multiple proportions is an extension of the law of definite composition, which states that compounds will consist of defined ratios of elements.
3. A reaction with more reactants will need more care because more products are produced, which can be toxic
4. H2 and Cl2 reactivity does not depend on the quantities but the chemical properties of each compound
As a professor Daniel must complete a research project each year in order to
stay on staff. Daniel is an engineer and has to deal with many complicated
mathematical calculations. Knowing this fact Daniel would most likely concern
himself with qualitative research,
Explanation:
Add our site sources in order to be advantage of knowledge
The strength of van der Waals forces increases as:
A. molecular size decreases
B. molecular size increases
C. number of electrons increases
D. number of electrons decreases
Answer:
B and C
Explanation:
is it multiple choice question??
Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.
What are Van der Waals force?
Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.
An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.
The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.
Therefore, the size and the electron increase the Van der Waals force.
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Which describes a relationship when calculating the energy of a photon? The energy of the photon is directly proportional to frequency. The energy of the photon is inversely proportional to frequency. As the energy of the photon increases, Planck’s constant increases. As the energy of the photon increases, Planck’s constant decreases.
Answer:
The photon is directly proportional to frquency
Explanation:
E=hf
where E is energy
h is plancks constant and
f is frequency
Answer:
A
Explanation:
Edge 2022
A. Identify the type of molecule shown in the drawing. (2 points)
Answer: 1) Caboxylic acid
2) Ether
3) Ester
4) Aldehyde
5) Amine
6) Alcohol
Explanation: The type of a molecule is based it's primary functional group.
https://en.wikipedia.org/wiki/Functional_group
The identities of the given molecules shown in the drawing are:
1) Carboxylic acid.
2) Ether
3) Ester
4) Ethane
5) Aldehyde
6) Amine
7) Alcohol
What are the organic compounds?Organic compounds are those compounds, which contain carbon-carbon and carbon-hydrogen bonds.
The five organic compounds are lipids, carbohydrates, protein, nucleotide, etc.
Thus, the correct option is 1) Carboxylic acid.
2) Ether
3) Ester
4) Ethane
5) Aldehyde
6) Amine
7) Alcohol
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3. Take vinegar, lemon juice, tap water in three separate glass beakers. Put chalk piece,pin, egg shell, leaves in three beakers. Note your observations how test the gas evolved in it.
Answer:
This process is know as Chromotography
Explanation:
PLS HELP. DUE TODAY.
1. T or F? All protons in an element contain an identical number of neutrons.
2. An atom with a _____ charge has the same number of protons and electrons.
Answer:
1. falseno all protons in an element doesn't contain an identical number of neutrons . number of electrons and number of protons contain identical number but the number of neutrons may vary. for eg: protons and neutrons of hydrogen is 1 and 0 respectively whereas protons and neutrons of helium is 2 and 2 .
2.neutral chargeWhat would the car weigh on Earth with a gravitational pull of 9.8 N/kg?
Answer:
Explanation:s the gravitational field strength on Earth's 9.8 N kg?
The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram).
Distillation can be separated in what technique?
A. Chemical
B. Physical
Answer:
B. Physical process is the way distillation can be separated.
what is electron configuration?
Answer:
electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
Which of the following best describes a scientific model?
Question 6 options:
Something used to represent an idea or process
A way to prove a theory is true
A direct experience in nature
A prediction that can be tested
Explanation:
idea= hypothesis
xperience in nature= read Darwin's theory..
with birds from Galapagos island or rain forest environment., had proven that the shape of a bird's beaks, determined what their diet consisted of In the wild.
captured birds from such countries, has proven, an omnivore or seed eater...through testing plus dissection.
Nguyên tố hoá học là gì
Nguyên tố hóa học, thường được gọi đơn giản là nguyên tố, là một chất hóa học tinh khiết, bao gồm một kiểu nguyên tử, được phân biệt bởi số hiệu nguyên tử, là số lượng proton có trong mỗi hạt nhân.
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Heisenberg's uncertainty principle stats that's isn't possible to know the exact momentum and _______ of a particle simultaneously. In terms of atomic structure, this means that we can't determine fixed ________ for electrons but can only determine the _________ of finding an electron in a given region of space.
What are two factors that can change the rate of a chemical?
Answer:
the surface area of a solid reactant.
temperature.
presence/absence of a catalyst.
what amount (in moles) is present in 2.0g of sodium hydroxide,NaOH
Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
