Which electron notation is incorrect?
1s 2s 2p 3s 3p 10
1s 2s 2p 3s 3p3
1s2 282 2p 3s 3p6
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Related Questions
what happen when the nitrate of an alkali metal is heatad?
Answers
answer
Gives brown colour gas
Why is acetic acid called weak acid?
Answers
Answer:
because...it is not strong enough proton donor to be entirely converted to hydronium ions in aqueous solution...
Explanation:
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Determine the mass of silver chloride precipitated when 2g of sodium chloride solution react with silver trioxonitrate (v) solution. (Ag=108, N=14, O=16, Na =23, Cl=35.5)
Answers
The mass of silver chloride precipitated when 2g of sodium chloride solution reacted with silver trioxonitrate (v) solution is 4.88g.
Let us discuss this in detail,
The balanced equation of the reaction of sodium chloride and silver trioxonitrate is
2AgNO3 + 2NaCl → 2AgCl + 2NaNO3
From the equation, 2 moles of silver chloride are produced for every 2 moles of sodium chloride.
No.of moles in 2g sodium chloride solution
moles = mass / molar mass
The molar mass of sodium chloride (NaCl) is:
Na = 23 g/mol
Cl = 35.5 g/mol
Molar mass of NaCl = Na + Cl = 23 + 35.5 = 58.5 g/mol
by using the above formula
moles of NaCl = 2g / 58.5 g/mol = 0.034 moles
The molar mass of AgCl is:
Ag = 108 g/mol
Cl = 35.5 g/mol
Molar mass of AgCl = Ag + Cl = 108 + 35.5 = 143.5 g/mol
Using the formula:
mass = moles x molar mass
The mass of AgCl is:
mass of AgCl = 0.034 moles x 143.5 g/mol = 4.88 g
The mass of silver chloride precipitated when 2g of sodium chloride solution reacted with silver trioxonitrate (v) solution is 4.88g.
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SEP Develop a Model: The element argon (Ar) has eight valence electrons and is a liquid at very low temperatures. Sketch a model of two argon atoms and where each atom’s electrons need to be in order for an attractive dispersion force to occur. Make a similar sketch that explains why larger molecules typically experience larger dispersion forces.
Answers
Larger molecules experience larger dispersion forces due to more distance of valance of electrons from the nucleus.
Larger atoms and molecules have stronger dispersion forces than smaller atoms and molecules because in a larger atom or molecule, the valence electrons are present farther from the nuclei than in a smaller molecule.
They are less tightly held to the nuclear charge present in the nucleus and can easily form temporary dipoles so we can conclude that larger molecules experience larger dispersion forces due to more distance of valance of electrons from the nucleus.
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Write a CER about electromagnetism. With 4 pieces of evidence from a 8th grade science book volume 1. 4 pieces of reasoning and a claim. this is the question how can pieces of metal be picked up and released by a crane? PLEASE HELP
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Claim: The ability of a crane to pick up and release pieces of metal is due to the principles of electromagnetism.
How to write a CER?Evidence:
According to the 8th grade science book, Volume 1, electricity can create magnetic fields.The book also states that a magnetic field can attract certain metals, such as iron and steel.Electromagnets can be created by wrapping a wire around a magnetic core, like an iron bar, and applying an electric current to the wire.The strength of the electromagnet can be increased by increasing the number of wire twists or the current flowing through the wire.Reasoning:
When an electric current flows through a wire wrapped around a magnetic core, it creates a magnetic field that can attract metal objects.The magnetic field created by the electromagnet can be turned on and off by switching current flow, allowing the crane operator to pick up and release objects.Increasing the number of wire twists or current flow increases the strength of the magnetic field, allowing the crane to lift even heavier objects.The ability to control the magnetic field allows the crane operator to maneuver objects with precision, such as moving them from one location to another or placing them onto a specific area.Therefore, the principles of electromagnetism are responsible for the crane's ability to pick up and release pieces of metal.
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Which of the following statements on HPLC modes is true? A. Increasing the polarity of the mobile phase decreases the elution time of polar compounds in normal-phase HPLC B. A non-polar stationary phase is used in normal-phase HPLC C. Compounds have a lower attraction to the mobile phase than to the stationary phase in displacement development D. A polar stationary phase is used in reversed-phase HPLC E. More polar compounds elute first in normal-phase HPLC
Answers
The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).
The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.
There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.
More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.
Thus, the correct option is E.
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The service sector in Jessica’s economy is dominant. Which sector is dominating Jessica’s country? Jessica lives in a sector economy. Could be one of the most important occupation in Jessica’s economy.
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The service sector is dominant in Jessica's economy. The service sector refers to the portion of the economy that provides services rather than producing goods.
It includes various industries such as retail, healthcare, education, finance, hospitality, and more. Since the service sector is dominant in Jessica's economy, it means that a significant portion of the economic activity and employment is focused on providing services to consumers or other businesses. This indicates that the country relies heavily on service-based industries to drive economic growth and generate employment opportunities.
Given that Jessica lives in a sector economy, one of the most important occupations in her country would likely be related to the service sector. Occupations such as customer service representatives, healthcare professionals, educators, financial advisors, and hospitality workers could be crucial in driving the economy and meeting the needs of the population.
It is important to note that other sectors like the agricultural and industrial sectors may still exist in Jessica's country, but the dominance of the service sector suggests that it plays a central role in the economy.
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Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?
Answers
Answer:
2.02 × 10^5 Pa
Explanation:
According to this question, in an experiment, a container was filled with gas at pressure of 101,000 Pa, at room temperature. When this temperature was doubled, the pressure also increased by two times i.e.
The pressure changed to (101,000 Pa × 2) = 202,000 Pa
This question is asking to represent this in scientific notation. Scientific notation aims at representing a small or too large number in an easy way. It is done by making use of power of ten i.e. a × 10^b
Where; a = decimal number
b = power of ten
In the case of a large number like 202,000, the power of ten is derived by counting the decimal place backwards. If we are to count until we stop in front of the last digit, we will have 5 times.
That is; 2.02000 × 10^5
We can remove every trailing zeros
Hence, the answer is 2.02 × 10^5 Pa.
what are the different columns called in a periodic table
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In a periodic table, the different columns are called "groups" or "families."
The groups are numbered from 1 to 18, and they are arranged in vertical columns from left to right. Each group contains elements with similar chemical properties and the same number of valence electrons.
The elements within a group exhibit similar trends in terms of their reactivity, electronegativity, and other properties.
Some groups have specific names or designations. For example, Group 1 is known as the "alkali metals," Group 2 as the "alkaline earth metals," Group 17 as the "halogens," and Group 18 as the "noble gases." These names reflect the characteristic properties of the elements within those groups.
The periodic table also has horizontal rows called "periods," which represent the number of electron shells or energy levels occupied by the elements' electrons. Each period is labeled with a number from 1 to 7.
Overall, the periodic table is a systematic arrangement of elements that allows scientists to organize and understand the properties and relationships of different elements based on their atomic structure and chemical behavior.
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A cube of steel has dimensions 0.2 m x 0.2 m x 0.2 m. What is the volume of the cube in cubic centimeters? ___cm3
Answers
Answer:
8000 cm3
Explanation:
First convert the 0.2 meters to cm which is 20, then multiply 20 cm x 20 cm x 20 cm which equals 8000 cm3. This is the correct one
The volume of a cube is given by the cube of the edge of the length given of the sides. The volume of the cube with a dimension of 0.2 m x 0.2 m x 0.2 m is 8000 cm³.
What is the volume?Volume is said to be the scalar quantity that measures the three-dimensional shape with a closed system. The volume has been given in cubic centimeters and cubic meters, which is a derived unit of length (meter).
The volume of a cube is given by the length of its sides as a³. The length of the dimension of the cube is 0.2 m x 0.2 m x 0.2 m.
Given,
a = 0.2 m
Here, 1 m = 100 cm
Then, 0.2 m = 20 cm
The volume of a cube is calculated as:
The volume of the cube = a³
= 20 cm x 20 cm x 20 cm
= 8000 cm³
Therefore, the volume of a cube with dimensions 0.2 m x 0.2 m x 0.2 m is 8000 cm³.
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Are these data sets on chemical changes consistent with the law of conservation of
a. A 7.5-g sample of hydrogen gas completely reacts with 60.0 g of oxygen gas to
form 67.5 g of water.
b. A 60.5-g sample of gasoline completely reacts with 243 g of oxygen to form 206
g of carbon dioxide and SS g of water.
Answers
The data set on chemical changes consistent with the law of conservation of mass is:
The reaction of 7.5 g of hydrogen and 60 g of oxygen to produce 67.5 g of water (Option A)
What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to verify the law of conservation of massA. Reaction of hydrogen with oxygen
Hydrogen + Oxgen = Water
7.5 + 60 = 67.5
67.5 g = 67.5 g
Since the mass of the reactants and products are the same, then the reaction supports the law of conservation of mass
B. Gasoline + oxygen = carbon dioxide + water
60.5 + 243 = 206 + 55
303.5 g ≠ 261 g
Since the mass of the reactants and products are not the same, then the reaction do not support the law of conservation of mass
From the above illustrations, the following conclusions were made:
Option A is consistent with the law of conservation of mass.Option B is not consistent with the of conservation of mass.Learn more about chemical equation:
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An ad claims that a supplement helps a person lose weight, helps curb appetite to snack less, raises levels of serotonin to make a person feel less hungry, blocks new fat from forming, and increases metabolism to have more energy and burn existing fat. The manufacturer of the supplement published the data from the study of the product.
The study of the supplement used 100 subjects between the ages of 20 and 65. Of the 100 participants, 50 were male and 50 were female. Once the participants were selected for the study, each had the visceral fat measured. After all 100 participants were measured, it was determined that each had a measurement of more than 90 centimeters.
The testing subjects were divided into two groups. One group of 50 received the supplement and one group of 50 received a placebo. The study lasted for 16 weeks, but after 12 weeks, both groups were given the placebo.
After 16 weeks, men in both groups had a slight decrease in body weight. At the end of the study, the group receiving the supplement had reduced visceral fat when compared to the placebo.
After reading this data summary, what do you think? Answer the following questions in a post. Each question is worth 2 points.
1.Based on the testing data of the supplement, were any of the product's claims, proven correct? If so, identify the claims.
2.What data led you to that conclusion?
3.Which of the product's claims, if any, were not proven to be correct?
4.What type of testing data would you need to see in support of those claims to believe they were true?
5.When you see a product advertised on social media, how can you determine whether it is making reliable claims?
Answers
Answer:
If FDA finds that the evidence supporting the proposed claim is credible and the claim can be qualified to prevent it from misleading consumers,
fda.gov
Explanation:
Categorize the following reaction: CH4 + O2 ---> CO2 + H2O *
Synthesis Reaction
Combustion Reaction
Replacement Reaction
Decomposition Reaction
Answers
Answer:
combustion reaction
Explanation:
combustion reactions have the end products H20 and C02
he time required for 0.010 moles of so 3 (g) to effuse through an opening was 22 seconds. under the same conditions, an unknown gas required 28 seconds. the unknown gas is most likely: a. xe(g) b. uf 6 (g) c. sif 4 (g) d. cf 4 (g) e. sf 6 (g)
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The gas is most likely to be Xenon. So the correct option is (a)
What is The rate of diffusion?The rate of diffusion, is the change in the number of diffusing molecules inside the cell over time i.e. \(d_{n}\) / \(d_{t}\). As the net movement of diffusing molecules depends on the concentration gradient then the rate of diffusion is directly proportional to the concentration gradient (\(d_{C}\)/\(d_{t}\)) across the membrane.
Since, \(\frac{1}{time}\) \(\alpha\) \(\frac{pressure}{\sqrt{molar weight} }\)
In the given question time required for 0.010 moles of SO₃ is 22 s
Time required for 1 mole of SO₃ is \(\frac{22}{0.01}\) × 1 = 2200 s
Now, \(\frac{1}{2200}\) \(\alpha\) \(\frac{1}{\sqrt{80} }\)
For unknown gas
\(\frac{1}{2800}\) \(\alpha\) \(\frac{1}{\sqrt{m} }\)
Now combining both the equation;
Since,
\(\frac{1}{2200}\) × 2800 = \(\frac{1}{\sqrt{80} }\) ×\(\sqrt{m}\)
m = 129.02 g/mole
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Balance the equation GaBi3 + NazSO, - Gaz(SO3)з + NaBr
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The balance equation is 2GaBi3 + 3Na2SO3 → 3Ga2(SO3)3 + 3NaBr. The equations are balanced by adjusting the coefficients of each compound so that the number of atoms for each element was the same on both sides of the equation.
The specified chemical equation is not balanced. The first step in balancing a chemical equation is to ensure that the number of atoms for each element is the same on both sides of the equation.
The balanced equation is:
GaBi3 + 3Na2SO3 → Ga2(SO3)3 + 3NaBr
This balanced equation has the same number of atoms for each element on both sides of the equation. First, balance the Ga and Bi atoms by putting a factor of 2 in front of GaBi3 to get 2GaBi3. Then put a factor of 3 in front of Na2SO3 to balance the Na atoms and get 3Na2SO3. Finally, put a factor of 3 in front of Gaz(SO3)ç to balance the S and O atoms and get 3Ga2(SO3)3. So the balanced equation would be:
2GaBi3 + 3Na2SO3 → 3Ga2(SO3)3 + 3NaBr
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Consider the balanced chemical equation when 18.3 g Al is reacted with 113 g I₂ to form AlI₃(g).
What is the mass in grams of the excess Al remaining after the partial reaction of 18.3 g Al with 113 g I₂?
2 Al(s) + 3 I₂(g) → 2 AlI₃(g)
Answers
Answer:
10.3 g Al
Explanation:
To find the excess mass of Al, you need to (1) convert grams I₂ to moles I₂ (via molar mass), then (2) convert moles I₂ to moles AlI₃ (via mole-to-mole ratio from equation coefficients), then (3) convert moles AlI₃ to grams AlI₃ (via molar mass). Now that you have the actual amount of AlI₃ produced, you need to (4) convert grams AlI₃ to moles AlI₃ (via molar mass), then (5) convert moles AlI₃ to moles Al (via mole-to-mole ratio from equation coefficients), and then (6) convert moles Al to grams Al (via molar mass). Now that you know the amount of Al actually needed to produce the product, you need to (7) find the excess mass of Al.
Molar Mass (Al): 26.982 g/mol
Molar Mass (I₂): 2(126.90 g/mol)
Molar Mass (I₂): 253.8 g/mol
Molar Mass (AlI₃): 26.982 g/mol + 3(126.90 g/mol)
Molar Mass (AlI₃): 407.682 g/mol
2 Al(s) + 3 I₂(g) -------> 2 AlI₃(g)
113 g I₂ 1 mole 2 moles AlI₃ 407.682 g
------------- x ---------------- x ---------------------- x ------------------- = 121 g AlI₃
253.8 g 3 moles I₂ 1 mole
121 g AlI₃ 1 mole 2 moles Al 26.982 g
--------------- x ------------------ x --------------------- x ----------------- = 8.01 g Al
407.682 g 2 moles AlI₃ 1 mole
Starting Amount - Mass Needed = Excess
18.3 g Al - 8.01 g Al = 10.3 g Al
Which factors Cause Earth to experience seasons? Check all that apply
Answers
Answer:
what are the options to the question
Answer:
b and c
Explanation:
just took it on edge :)
What do these elements make:
neodymium, rhenium and sulfur
Answers
Answer:
Neodymium makes flints inside of lighters. It also takes away the green color off of glass. Rhenium is added with tungsten and molybdenum which makes filaments for lamps. Sulfur makes sulfuric acid which makes batteries and cleaners and can process ores.
Explanation:
An interesting fact for each element:
Neodymium is known for the atomic symbol Nd and the atomic number 60.
Rhenium is known for the atomic symbol Re and the atomic number 75.
Sulfur is known for the atomic symbol S and the atomic number 16.
I hope the Answer answers your question. I gave you some facts to remember those elements in the periodic table!
Neodymium(III) bromide, NdF3, neodymium(III) chloride, NdCl3, neodymium(III) bromide, NdBr3, and neodymium(III) iodide, NdI3, are the results of its reactions with fluorine, chlorine, bromine, and iodine.
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Which of the following is a chemical property? Select one: a. The air pressure at sea level is higher than that in Denver, Colorado. b. Water boils at 100°C. c. The rusting of the joints of a metal children’s swing set.
Answers
Answer:
c. The rusting of the joints of a metal children’s swing set.
Explanation:
By definition, chemical property describes the ability of a substance to undergo a specific chemical change.
In the definition above, the key words are; "Chemical change".
Generally, chemical changes are irreversible. This means we just have t observe the options and pick the one that contains an irreversible change.
Upon doing ths, the correct option is;
c. The rusting of the joints of a metal children’s swing set.
This is because rusting is a chemical change and is irreversible.
What conclusions can you make about the relationship between the volume of a gas and its pressure?
Answers
Answer:
\(V \alpha \frac{1}{P}\)
Explanation:
According to Boyle's law, the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.
This implies that, if the volume of a gas is halved, its pressure is doubled and vice versa.
This is mathematically represented as; \(V \alpha \frac{1}{P}\) hence \(PV = K\). This is the mathematical statement of Boyle's law.
How many mL of 0.218 M sodium sulfate react with exactly 25.34 mL of 0.113 M BaCl2 given the reaction: BaCl2(aq) + Na2SO4(aq) - BaSO4(s) + 2NaCl(aq) a.2.86 b.13.1 c.5.52 d.24.6 e.none of the above
Answers
The volume of 0.218 M sodium sulfate needed to react with 25.34 mL of 0.113 M barium chloride is approximately 13.11 mL. The correct answer is (b).
To determine the volume of 0.218 M sodium sulfate (Na2SO4) needed to react with 25.34 mL of 0.113 M barium chloride (BaCl2), we can use the concept of stoichiometry and the balanced chemical equation provided.
The balanced equation is:
BaCl2(aq) + Na2SO4(aq) -> BaSO4(s) + 2NaCl(aq)
From the equation, we can see that the stoichiometric ratio between BaCl2 and Na2SO4 is 1:1. This means that one mole of BaCl2 reacts with one mole of Na2SO4.
To calculate the volume of Na2SO4 needed, we can use the following steps:
Step 1: Convert the given volumes to moles using the concentration (Molarity) and volume (in liters):
Moles of BaCl2 = concentration x volume = 0.113 M x 0.02534 L
Moles of Na2SO4 = Moles of BaCl2 (since the stoichiometric ratio is 1:1)
Step 2: Convert moles of Na2SO4 to volume in milliliters (mL) using the concentration (Molarity):
Volume of Na2SO4 = Moles of Na2SO4 / concentration = Moles of BaCl2 / concentration
Substituting the known values:
Volume of Na2SO4 = (0.113 M x 0.02534 L) / 0.218 M
Calculating the volume of Na2SO4:
Volume of Na2SO4 = 0.01311 L = 13.11 mL
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What mass of hydrogen is produced when 195mg of potassium is added to water?
Answers
The mass of hydrogen that will be produced when 195 mg of potassium is added to water would be 5 mg.
Stoichiometric problemFrom the balanced equation of the reaction:
\(2K + H_2O --- > 2KOH + H_2\)
The mole number of the potassium that reacts to the mole of the hydrogen gas that is produced is 2:1.
If 195 mg of potassium reacts:
1 mg = 0.001 g
195 mg = 195 x 0.001
= 0.195 g
Recall that: mole = mass/molar mass
Molar mass of potassium = 39 g/mol
mole of 0.195 g potassium = 0.195/39
= 0.005 mol
From the stoichiometric mole ratio, the equivalent mole of hydrogen gas produced would be:
0.005/2 = 0.0025 mol.
Molar mass of hydrogen gas = 2 g/mol
Mass of 0.0025 hydrogen gas = 0.0025 x 2
= 0.005 g
0.005 g = 0.005 x 1000
= 5 mg
This means that 0.005 g or 5 mg of hydrogen gas will be produced when 195 mg of potassium is added to water.
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how many meals would you get if you were to go on a flight to mars from earth
Answers
Each crew member receives three wholesome meals daily along with snacks. The food for each astronaut is kept onboard the Shuttle and is given a unique color dot to identify it.
This is further explained below.
What is Mars?Generally, Being bigger than only Mercury, Mars is the second-smallest planet in the Solar System and is located four planets from the Sun. The Roman god of battle is the inspiration for the name of Mars in English.
It provides each member of the crew with three meals that are well-balanced, in addition to snacks. On board the Space Shuttle is where all of the astronauts' food is kept, and each individual box has a colorful dot that identifies it.
In conclusion, For example, traveling to Mars and returning may take more than three years and need the supply of thousands of kg of food. If the crew of four were to consume merely three meals per day while on their three-year voyage to Mars, they would need to bring more than 24,000 pounds (10,886 kilograms) of food with them.
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Animation shows a complete revolution of the Earth around the sun. What happens during this time? The moon makes one complete phase change. The moon makes one complete phase change. Four seasons occur on Earth. Four seasons occur on Earth. Earth experiences a complete day. Earth experiences a complete day. Day turns to night.
Answers
Answer:
Four seasons occur on Earth
Explanation:
When the Earth has completely one revolution around the Sun, then it has completed 1 year, and four seasons have occurred in the meantime.
Four seasons occur on Earth when the Earth completes a revolution around the Sun.
The following points can be considered:
The Moon makes one complete phase change when the Moon revolves around the Earth. The Moon makes one complete phase change by a month. Four seasons occur on Earth as a result of the Earth completes one revolution around the Sun. The Earth experiences a complete day as a result of the Earth’s rotation along its own axis. The day turns to night as a result of the Earth’s rotation along its own axis.Therefore the correct answer is Four seasons occur on Earth.
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true or false: helium is the ash of the sun's nuclear furnace.
Answers
False. Helium is not the ash of the sun's nuclear furnace. While helium is produced in the sun's nuclear fusion process, it is not considered the ash. Helium itself is a light, inert gas that does not undergo further nuclear reactions in the sun's core. So, while helium is a byproduct of the sun's nuclear furnace, it is not the ash of the process.
In the core of the sun, nuclear fusion occurs where hydrogen nuclei, or protons, combine to form helium nuclei. This process releases a tremendous amount of energy, powering the sun. The primary ash, or product, of this fusion process is a specific isotope of helium known as helium-4. Helium-4 consists of two protons and two neutrons and is a stable, inert gas. It is not further involved in nuclear reactions within the sun's core. While helium-4 is produced in the sun's nuclear furnace, it is not accurate to say that helium itself is the ash.
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(PLEASE HELP WITH THIS DUE SOON WILL GIVE BRAINLIST TO BEST ANSWER)
what is the density of an object that has a volume of 8mL and the mass of 22 grams? (show all 5 steps with correct units) (1 pt. for each step)
The photo is showing how the promblom format should be done
Answers
Answer:
2.75 g/mLExplanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\\)
From the question
mass = 22 g
volume = 8 mL
We have
\(density = \frac{22}{8} = \frac{11}{4} = 2.75 \\ \)
We have the final answer as
2.75 g/mLHope this helps you
A solution of NaCl was prepared in the following manner: 0.0842 g of NaCl is massed out on an analytical balance. The solid is transferred to a 25.00 mL volumetric flask. Deionized water is added to the flask such that the bottom of the meniscus is at the line. A 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask using a volumetric pipet and diluted to volume. 6. Calculate the concentration of NaCl in the resulting solution in mg/L NaCl. (answer = 67.4 mg/L) 7. Calculate the concentration of NaCl in the resulting solution using propagation of error through the calculation. Use the manufacturer's tolerance values as the absolute error. The tolerances can be found in Chapter 2 of the Harris text. Assume a Class 1 balance and Class A glassware. Treat the tolerances as random error. (answer = 67.4+0.4 mg/L) 8. Identify 2 possible sources of random (indeterminate) error. Identify 2 possible sourses of systematic (determinate) error.
Answers
Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl
To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7. Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.
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Can someone please help me answer these questions and I’ll give you brainlest!!!!!
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Explanation:
first of all open the menu
Please I need this answer
Answers
Answer:
wave c i think
Explanation:
why does fluorine have the highest electronegativity
Answers
Answer:
Because it only needs one more electron to get to a full valence shell (8), so it really wants it and is pulling other electrons in. It also has to do with needing one more electron to fill the 2p shell. It is a small element which means its electrons are pulled tightly to the nucleus.
Hope this helps!
Explanation: