pls help noww
Just want to see who's the smartest here
promise to tag u as brainliest
Answers
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
1. The equation representing the equation is ~
\( \mathrm{Na + Cl\rightarrow NaCl}\)
The given reaction is a redox reaction because there's a transfer of electron from Sodium (Na) to chlorine (Cl)
where sodium is oxidized (due to loss of electron) and chlorine get reduced (due to gain of electron).
2. Sodium is a highly reactive element which belongs to the 1st group of periodic table, hence it can catch fire if it is kept free in atmosphere. so in order to prevent that it is stored in kerosene oil, which doesn't let Sodium come in contact with air .
Related Questions
The most abundant minerals belong to chemical group termed the ____________.A. Silicates
B. Anion
C. Polymorphs
D. Luster
Answers
Silicates are the most abundant mineral group and make up about 90% of the Earth's crust. They are composed of silicon and oxygen atoms held together by strong chemical bonds.
Silicates are generally hard and durable and can form a wide variety of shapes and colors. They are also very abundant in the Earth's crust, making them an important component of rocks and soil. Silicates are also important components of many meteorites, and some have been found on other planets and moons. Silicates can form in igneous, sedimentary, and metamorphic rocks, and they often form the crystals found in rocks and gemstones.They are often resistant to weathering, meaning they can last for a long time on the surface of the Earth. Silicates are also abundant in meteorites, comets, and other extraterrestrial rocks, which provide clues about the formation and evolution of our solar system.
To learn more about silicates click here https://brainly.com/question/29560091
#SPJ4
All isotopes of an element have nearly identical chemical behavior because chemical behavior is determined primarily by ______.
Answers
All isotopes of an element have nearly identical chemical behavior because chemical behavior is determined primarily by :
All isotopes of an element have nearly identical chemical behavior because chemical behavior is determined primarily by the number and arrangement of electrons in an atom, specifically its electron configuration. Therefore, regardless of the number of neutrons in their nuclei, all isotopes of an element have the same number of electrons and thus exhibit similar chemical properties. Isotopes may differ in their atomic mass due to varying numbers of neutrons, but their chemical behavior, such as reactivity, bonding patterns, and participation in chemical reactions, remains consistent.
Chemical behavior is primarily determined by the number and arrangement of electrons in an atom, specifically its electron configuration. Therefore, all isotopes of an element, regardless of the number of neutrons in their nuclei, have nearly identical chemical behavior. Isotopes differ only in their atomic mass due to the varying number of neutrons, but their chemical properties, such as their reactivity, bonding patterns, and participation in chemical reactions, remain unchanged.
Learn more about isotopes here : brainly.com/question/28039996
#SPJ11
Calculate the mass defect and nuclear binding energy per nucleon ofthe each of the nuclides indicated below.Part A) Li-7 (atomic mass = 7.016003 )Express your answer using five decimal places.Mass Defect=
Answers
the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.
Given data:
Atomic mass of Li-7, A = 7.016003
The atomic mass of Li-7 is the sum of the number of protons and neutrons in it. Therefore, the number of neutrons in Li-7 is:
Neutrons = Atomic mass - Protons= 7.016003 - 3= 4.016003The mass of 3 protons and 4.016003 neutrons in Li-7 is: Mass of protons + Mass of neutrons = (3 x 1.007276) + (4.016003 x 1.008665) = 3.021828 + 4.029454 = 7.051282 u
Therefore, the mass defect in Li-7 is:
Mass defect = Actual mass - Calculated mass
= Atomic mass - Mass of protons and neutrons
= 7.016003 - 7.051282
= -0.035279 u
Nuclear Binding Energy per nucleon (BE/A) can be calculated using the formula:
BE/A = [Δm.c² / A]
where Δm is the mass defect and c is the speed of light which is 2.998 × 10⁸ m/s.
Substituting the values in the above formula:
BE/A = [(-0.035279) × (2.998 × 10⁸)² / 7]= 5.60553 × 10⁻¹² J/nuclide
Therefore, the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.
learn more about mass defect here
https://brainly.com/question/16485729
#SPJ11
)
Many desert mammals have developed a nocturnal lifestyle. This means that during the day they sleep underground in their
burrows, and they come out to eat and play at night.
What is a good reason for a desert fox to show this pattern of behavior?
A)
To avoid the most common predators in the desert.
B)
To avoid being exposed to the sun during the hot day.
C)
Because hunting at night allows the fox to use its night vision.
Đ)
Because steeping in-a-burrow during the day will help it-find water
Answers
A good reason for a desert fox to show this pattern of behavior because hunting at night allows the fox to use its night vision.
What is Hunting?
Thi9s is commonly practised by predators such as fox in which they capture and kill other animals for food.
The fox has a good night vision which makes it able to hunt for animals during the night also. This is why option C is chosen as the most appropriate choice.
Read more about Hunting here https://brainly.com/question/81175
the balance in this photograph is called _____. group of answer choices analytic balance anti balance symmetrical balance di sotto in sù
Answers
The balance in this photograph is called symmetrical balance. Symmetrical balance is also known as formal balance or bilateral symmetry, and it is a fundamental principle of design that creates stability and harmony. Symmetrical balance is achieved when the design's visual weight is evenly distributed on both sides of the central axis.
In other words, both sides of the composition are identical, with similar shapes, colors, and textures. This type of balance is often used in traditional, formal, or classical designs. However, it may also be used in more contemporary designs to create a sense of calmness and tranquility.Symmetrical balance is used in a variety of settings, including art, graphic design, and interior design. It can be found in everything from paintings to logos to home decor. It is a versatile principle of design that can be used in a variety of ways to create a sense of order and harmony.In conclusion, the balance in the photograph is symmetrical balance. Symmetrical balance is a fundamental principle of design that creates stability and harmony. It is achieved when the design's visual weight is evenly distributed on both sides of the central axis. Symmetrical balance is used in a variety of settings, including art, graphic design, and interior design. It is a versatile principle of design that can be used in a variety of ways to create a sense of order and harmony.
To know more about symmetrical balance, visit:
https://brainly.com/question/32536116
#SPJ11
what gives leaves their color green?
Answers
Calcium carbonate decomposes if heated to form calcium oxide and carbon dioxide. If 24.5 g of calcium carbonate decompose how many moles of calcium carbonate reacted?
Answers
Calcium carbonate, CaCO3, decomposes to form calcium oxide, CaO, and carbon dioxide, CO2. The balanced chemical equation for this decomposition reaction is:
CaCO3 -> CaO + CO2
To determine the number of moles of calcium carbonate that react, you need to know the molar mass of calcium carbonate. The molar mass of calcium carbonate is 100.09 g/mol.
Now, you can use the molar mass of calcium carbonate to calculate the number of moles of calcium carbonate that react. To do this, divide the mass of calcium carbonate by its molar mass:
24.5 g CaCO3 / 100.09 g/mol = 0.2447 moles CaCO3
Therefore, 0.2447 moles of calcium carbonate react when 24.5 g of calcium carbonate decompose.
Which degree does Linda need to obtain?
Linda wants to pursue a career in the veterinary field. She enjoys training and teaching students. So, she wants to become a veterinary professor.
To become a veterinary professor, Linda needs to obtain a
degree in veterinary medicine.
Answers
Answer:
Doctorate
Explanation:
Answer for PLATO
SpongeBob loves to garden and wants to grow lots of pink flowers for his pal Sandy. He brought a special Flower Power fertilizer to see if it will help plants produce more flowers. He plants two plants of the same size in separate containers with the same amount of potting soil. He places one plant in a sunny window and waters it every day with fertilized water. He places the other plant on a shelf in a closet and waters it with plain water every other day.
What did SpongeBob do wrong in this experiment? Explain.
How could SpongeBob improve his experiment?
Answers
Answer: He had more than one independent variable.
Explanation: It would only be fair, if both plants were in a sunny window, because then, it would be easier to see if the fertilizer actually affected the plants. This is because there is always a chance that the lack of sunlight decreased the number of flowers on the plant, instead of the fertilizer. It is always better to just have one independent variable.
You are given 3 unknown solutions with pH value as 6, 8 & 9.5 respectively. Which solution will contain maximum OH ion
Answers
Hope it helps : )
What is the Ka of a 0.0796 M solution of nitrous acid (HNO2) with a pH of 2.95?
Answers
Answer:
Coefficient = 1.58
Exponent = - 5
Explanation:
pH = 2.95
Molar concentration = 0.0796M
Ka = [H+]^2 / [HA]
Ka = [H+]^2 / 0.0796
Therefore ;
[H+] = 10^-2.95
[H+] = 0.0011220 = 1.122 × 10^-3
Ka = [H+] / molar concentration
Ka = [1.122 × 10^-3]^2 / 0.0796
Ka = (1.258884 × 10^-6) / 0.0796
Ka = 15.815 × 10^-6
Ka = 1.58 × 10^-5
Coefficient = 1.58
Exponent = - 5
Calculate the mass of water produced when 7. 92 g of butane reacts with excess oxygen
Answers
The mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.
The balanced chemical equation for the combustion of butane with oxygen is:
C4H10 + 13O2 -> 4CO2 + 10H2O
we can calculate the number of moles and then use the stoichiometry of the reaction to find the mass of water produced.
Firstly convert the mass of butane to moles:
moles = mass / molar mass
moles = 7.92 g / 58.12 g/mol = 0.1364 moles
Next, we'll use the stoichiometry of the reaction to find the no. of moles of water produced:
moles of water = 0.1364 moles * 10 moles of water / 1 mole of butane
moles of water = 1.364 moles
Finally, we'll convert the number of moles of water to mass:
mass = moles * molar mass
mass = 1.364 moles * 18.015 g/mol = 24.6 g
So, the mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.
To learn more about stoichiometry:
https://brainly.com/question/14935523
#SPJ4
how do you find the LD50 and how do you calculate the amount of substance that would harm a person of a certain weight?
Answers
The LD50 (Lethal Dose 50) is a measure used in toxicology to determine the lethal dose of a substance that would cause death in 50% of the test population.
However, it is important to note that conducting experiments to determine the LD50 of a substance on humans is unethical and illegal. The LD50 values are typically determined through animal testing, usually on rodents such as rats or mice.To calculate the amount of a substance that would harm a person of a certain weight, various factors need to be considered, including the toxicity of the substance and the individual's weight. In toxicology, a commonly used measure is the oral median lethal dose (LD50) expressed as milligrams per kilogram of body weight (mg/kg).To estimate the harmful dose for an individual of a certain weight, you would need to know the LD50 value of the substance and apply it to the weight of the person. The calculation involves multiplying the LD50 value by the person's weight in kilograms. However, it is crucial to emphasize that estimating harmful doses for humans based on animal LD50 values alone can be inaccurate and potentially dangerous.
It is essential to consult professionals in toxicology or poison control centers to obtain accurate information regarding the toxicity of a substance and its potential effects on human health.
for such more questions on substance
https://brainly.com/question/29108029
#SPJ8
Which is NOT TRUE of minerals? They cannot be made by any plant or animal. They are in the simplest chemical form when we eat them. The minerals in our food supply come from our environment and the earth. They are broken down when exposed to heat and oxygen.
Answers
The correct answer is (d) They are broken down when exposed to heat and oxygen.
The minerals are inorganic substances which are obtained from earth's crust. It is a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition, crystal form, and physical properties.
Common minerals include quartz, feldspar, mica, amphibole, olivine, and calcite. They are used by plants and animals to perform various physiological functions. Plants obtain minerals from the soil. Animals get minerals from plants or other animals.
Therefore, options (a), (b), and (c) are correct because minerals are not produced by plants and animals. Minerals are in their simplest chemical form, and minerals are obtained from the earth's crust and environment. They are not broken down when exposed to heat and oxygen. So, option (d) is incorrect. Hence, the correct option is (d) They are broken down when exposed to heat and oxygen.
To more about Minerals visit:
https://brainly.com/question/29970865
#SPJ11
hi how are you today well have a great rest of your day
Answers
Answer:
i've had my ups and down but i'm alright
Explanation:
no need to explain, enjoy your day
what is the reaction between phosphate ion (PO4 3-) and hydronium ion (H3O+)
Answers
Answer:
H3O+(aq) + PO43−(aq) ⇌ HPO42−(aq) + H2O(l)
Notice that the total charge (2-) is the same on both sides of the equation, and that this is reaction can take place in both directions.
Explanation:
i hope it helps uh..!!mark me as brainliest ♥️You must apply a force to put an object in motion or ________an object from moving.
(answer the blank)
Answers
Answer:
any push or pull that causes an object to move, stop, or change speed or direction
Description:
zayn your my enemy
Peer: Someone who belongs to the same group in society and is equal in rank or level. Scientists have their research reviewed by their peers, who are other scientists. As a student, you have your work reviewed by your teachers and parents but they are not your peers. Who are your peers ?
Answers
Answer:
see below (I hope this helps!)
Explanation:
You are a student, therefore, the people who are the same "rank" as you are your fellow students, this makes them your peers.
The periodic table organizes elements according to INCREASING
A)
atomic mass.
B)
energy level
C)
atomic number
D)
valence number
Answers
Answer:
C)
atomic number
Explanation:
C)
atomic number is also the number of protons an atom has and this number will never change unlike number of neutrons or electrons.
Please help me on #2 giving BRAINLIEST!
Answers
Answer:
basic
Explanation:
because H is hydrogen
Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL vol. pipet with a few drops and then pipet exactly 1.00-mL into a 50-mL volumetric flask. (Take care not to pipet any solids.) Fill the 50-mL volumetric flask to the mark with acidic FeCl3 solution. Cap and invert to mix the solution. What color is the solution
Answers
Answer:
The color of the solution turned a clear brown sort of a copper color
Explanation:
The color of the solution turned a clear brown sort of a copper color.
This is because ASA and the FeCl3 are reacting in a manner that it is resulting in the creation of a metal.
Are these students behaving appropriately? If not, what should they be doing differently?
Answers
Answer:
No.
Leftmost: Rick shouldn't be smelling any vapors; if required he should be using the wafting technique instead of putting it close to his face. Additionally, He's not wearing gloves nor a lab coat.
Middle: Sarah is not wearing any goggles nor a lab coat and she's at risk as she's pouring two different liquids into a solution at the same time which may pose a hazard of sudden irritation, exposure, heat or combustion.
Rightmost: Andrew is drinking a chemical of supposedly unknown origin putting him at risk by ingestion all the while lacking all of the requisite Personal Protective Equipment.
All of them are also at fault for leaving and not containing a chemical spill off to the side (rightmost), and by the looks of it, enter and operate the lab without their supervisor/professor present.
Explanation:
basta may sagot, sis
Which of the following factors will affect the accuracy of the measured molar mass of the complex? Only tick factors which correctly answer the question; ticking other answers will result in a reduced mark. Select one or more: measuring the absorbance of the solution at a wavelength of 580 nm instead of 480 nm. not mixing the solution in step 18 thoroughly. adding 4.9 mL of 2MKSCN in step 18 , instead of 5.0 mL. adding excess permanganate at step 17 so the solution is pink in colour.
Answers
Adding excess permanganate would oxidize some of the Fe2+ ions to Fe3+ ions, which would then lead to the formation of an incorrect complex. Therefore, it would affect the accuracy of the measured molar mass of the complex.
Molar mass is the mass of one mole of a substance, usually measured in grams per mole. Accuracy in the measured molar mass of the complex depends on the following factors: measuring the absorbance of the solution at a wavelength of 580 nm instead of 480 nm:
This would affect the molar mass of the complex as the wavelength at which absorbance is measured has a direct effect on the molar mass of the complex.not mixing the solution in step 18 thoroughly:
A poorly mixed solution in step 18 would affect the accuracy of the measured molar mass of the complex. adding 4.9 mL of 2MKSCN in step 18, instead of 5.0 mL: The concentration of the solution is of paramount importance as it is directly related to the molar mass of the complex.
Therefore, the 0.1 mL difference would affect the accuracy of the molar mass of the complex.adding excess permanganate at step 17 so the solution is pink in colour:
Adding excess permanganate would oxidize some of the Fe2+ ions to Fe3+ ions, which would then lead to the formation of an incorrect complex. Therefore, it would affect the accuracy of the measured molar mass of the complex.
To know more about permanganate visit:-
https://brainly.com/question/21028751
#SPJ11
Which element has the least density at STP?
Answers
Answer:
Helium, this noble gas has the least density at STP
Explanation:
Explain ow accommodating and co
llaborating might resolve conflict and contribute to harmonious relationships during your grade 12 academic year
Answers
Accommodating involves one party sacrificing their own interests to satisfy the other party's needs while collaborating involves both parties working together to find a mutually beneficial solution.
Conflicts can be quickly resolved and positive relationships between the parties involved by being accommodating. For instance, one student might decide to abandon their idea in favor of the other student's idea if two students in a group project have opposing opinions on how to approach a task. This can help the group get along better and avoid conflicts.
On the other hand, working together can result in creative answers that benefit both parties. When two people work together, they combine their distinctive perspectives and ideas, which can result in innovative solutions that neither party would have thought of on their own. For instance, if two students disagree on how to complete a group assignment, they can work together and combine their ideas to come up with a more thorough and workable solution.
Learn more about Accommodating
brainly.com/question/30492472
#SPJ4
6. An unknown compound is analyzed and found to consist of 49% carbon, 2.7
% hydrogen, and 48.2 % chlorine. If the molecular mass of the compound is 150,
what is the molecular formula of the compound?
Answers
Answer:
Molecular formula = C₆H₄Cl₂
Explanation:
Given data:
Percentage of hydrogen = 2.7%
Percentage of carbon = 49%
Percentage of chlorine = 48.2%
Molar mass of compound = 150 g/mol
Molecular formula = ?
Solution:
Number of gram atoms of H = 2.7 / 1.01 = 2.67
Number of gram atoms of Cl = 48.2 / 16 = 1.36
Number of gram atoms of C = 49 / 12 = 4.08
Atomic ratio:
C : H : Cl
4.08/ 1.36 : 2.67/1.36 : 1.36/1.36
3 : 2 : 1
C : H : Cl = 3 : 2 : 1
Empirical formula is C₃H₂Cl.
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = 12×3 + 1.01 ×2 + 35.5 = 73.52 g/mol
n = 150 / 73.52
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2 (C₃H₂Cl)
Molecular formula = C₆H₄Cl₂
What is formed when a piece of sodium is added to water
Answers
Answer:
Explanation:
2Na + 2HOH ====> 2NaOH + H2
This reaction is very reactive. It does not take much to get it going.
Na is sodium
HOH is another way to write water.
NaOH is Sodium Hydroxide.
H2 is hydrogen gas.
The hydrogen gas can ignite if there is an open flame around. Don't do this experiment with a Bunsen Burner nearby.
How do the physical and chemical properties of the new substance or substances created in the chemical reaction ( the products ) compare to the properties of the elements and original chemicals ( the reactants ) that made it ?
Answers
What mass of NaCl formed
when 0.25 g Na react
completely with 0.39 g Cl2?
A. 0.59 g NaCl
B. 0.64 g NaCl
C. -0.14 g NaCl
D. 0.14 g NaCl
Answers
Answer:
The answer is B
Explanation:
0.25 + 0.39= 0.64
A plant grows at the same rate as wheat plant 2. If the plant is 4.2 cm tall, calculate how old the plant is. Use the corrected trendline for wheat plant 2.
Answers
Answer:
The correct response is "3.127 weeks". A further explanation is given below.
Explanation:
As we know,
y = 1.3431x
Use, y = 4.2 cm
Now,
⇒ \(y = 1.3431x\)
On substituting the values of y, we get
⇒ \(4.2=1.3431x\)
⇒ \(x = \frac{4.2}{1.3431}\)
⇒ \(=3.127 \ weeks\)