molar mass of 4Fe(OH)2
Answers
Answer: The molar mass and molecular weight of 4Fe is 223.38.
Related Questions
The gas release during a chemical reaction which causes fizzing known as?
Answers
Answer:
Hey mate...
Explanation:
This is ur answer....
EffervescenceEffervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from that release.
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Explanation:
Your answer is effervensecence
An ionic bond occurs between a ___ and ___
Answers
Answer:
An ionic bond occurs between two opposite charges are attracted
Explanation: Two opposite charges are attracted to each other
Which best describes the sequence of elements in Period 5 of the periodic table? (Read the table from left to right and choose the best description)
Nonreactive gases, Metalloids, Nonreactive metals, Highly reactive metals, Highly reactive gases
Highly reactive gases, Relatively nonreactive metals, Metalloids, Very nonreactive gases, Nonreactive nonmetals
Highly reactive metals, Relatively nonreactive metals, Metalloids, Reactive nonmetals, Nonreactive gases
Nonreactive gases, Nonreactive metals, Highly reactive metals, Metalloids, Reactive nonmetals, Reactive gases
Answers
Answer: It’s the 3rd one
The elements of period 5 is best described as the Highly reactive metals, Relatively nonreactive metals, Metalloids, Reactive nonmetals, Nonreactive gases.
The elements of period 5 include metals and nonmetals,
For example-
Rubidium and Strontium reactive metals.It contains Relatively nonreactive metals,Nitrogen and phosphorus are nonmetals in period 5.Xenon is the non reactive gas in period 5.Therefore, the elements of period 5 is best described as the Highly reactive metals, Relatively nonreactive metals, Metalloids, Reactive nonmetals, Nonreactive gases.
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Which of the following elements has the ability to undergo sublimation
iodine
oxygen
carbon sodium
Answers
Answer:
iodine
Explanation:
Which is always the first step in dealing with an accident in the lab?
A. Call the emergency number, 911.
B. Call the fire department.
C. Notify the teacher.
D. Read the MSDS information.
Answers
carbohydrates are called bio fuels why ?
Answers
Answer:
There are so many carbohydrate which acts as bio fuel...Few of them glucose ,Cellulose ,starchtion:as bio fuel...Few of
If 1 atom of sulfur combines with 2 atoms of oxygen to form sulfur dioxide, what is the ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide?
Answers
Answer: The ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.
Explanation:
Law of constant proportion states that In a chemical substance the elements are always present in definite proportions by mass. This law is also known as 'Law of definite proportions '.
Mass of 1 atom of sulphur = 32 g
Mass of 1 atom of oxygen = 16 g
Mass of 2 atoms of oxygen =\(16g\times 2=32g\)
In formation of \(SO_2\) , 1 atom of sulfur combines with 2 atoms of oxygen and thus the mass ratio will be 32: 32= 1:1 .
Thus the ratio of mass of sulfur atom to mass of oxygen atom in sulfur dioxide is 1: 1.
The atmospheric pressure in Mexico City (elevation 2240 m) is 0.770 atm. Calculate the atmospheric pressure in mmHg and torr. Round each of your answers. to 3 significant digits. mm 0. X ? torr
Answers
The atmospheric pressure in mmHg and torr in Mexico was calculated to be 585 mmHg and 1 torr respectively.
The atmospheric pressure (also known as air pressure) at a point is the force acting on a unit area surrounding that point due to the height of the atmospheric column above that point.
Given,
The atmospheric pressure = 0.770 atm
We know,
1 atm = 760 mm Hg
So, 0.770 atm = 0.770 x 760 mm Hg
= 585 mm Hg
And, 1 mm Hg = 1 torr
So, 585 mm Hg = 585 torr.
Changes in air pressure are measured using a barometer which is a highly sensitive instrument. The reason why meteorologists pay so much attention to air pressure is that changes in air pressure cause changes in weather.
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claudia performed a flame test in her lab. the result of her flame test is shown here. what scientific questions could claudia ask about the flame? check all that apply. what element causes this flame color? is this the prettiest flame color? will the flame color change if another element is added? will changing the temperature affect the flame color? which flame test does the class like the best?
Answers
The scientific questions Claudia can ask about the flame test are (A), (C), and, (D).
The flame test is used to find sure factors, which on heating deliver a particular colour to the flame.
clinical questions are extraordinary from regular questions as they've a prior goal and need to be testable.
a very good scientific question is absolutely reality-primarily based and may be answered through experiment or using previous evidence.
three principal kinds of clinical questions are Verification questions, size, or statement-based totally facts series, which include specific capabilities of an organism or phenomenon.
The clinical questions Claudia ask is-
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What is the half-life of a radioisotope if 25. 0 grams of an original 200. -gram sample of the isotope remains unchanged after 11. 46 days?.
Answers
The half-life of a radioisotope if 25.0 grams of an original 200. -gram sample of the isotope remains unchanged after 11.46 days is 3.82 days.
What is radioisotope?The radioactive isotopes of an element are known as radioisotopes. They can also be described as atoms with an excessive amount of energy in their nucleus or unstable neutron-proton combinations.
A radioisotope's unstable nucleus can form either naturally or as a result of atomic manipulation. Radioisotope production can take place using a cyclotron or a nuclear reactor, depending on the situation. Molybdenum-99, which has a high neutron content, can be produced most efficiently in nuclear reactors, whereas fluorine-18, which has a high proton content, can be produced most efficiently in cyclotrons.
Uranium is the most well-known illustration of a naturally-occurring radioisotope. Uranium-238 makes up 99.9% of naturally occurring uranium; the remaining 0.7% is the less stable and more radioactive uranium-235, which has three fewer neutrons in its nucleus.
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The provided statement states that a radioisotope's half-life is 3.82 days if 25.0 milligrams of a 200.0-gram initial sample of something like the isotope remain intact after 11.46 days.
Who or what are radioisotopes?An unstable chemical element that releases radiation as it breaks down and becomes more stable. Both natural habitat and then a laboratory can manufacture radioisotopes. They are used in medical treatments and imaging examinations. also called a radionuclide.
Briefing:Since we now know that first phase kinetics governs radioactive decay,
Therefore, the following is the equation for the rate rule for first order kinetics:
\(k=\frac{2.303}{t} \log \frac{a}{a-x}\)
where,
k = rate constant
t = time taken for decay process = 11.46 days
a = initial amount of the reactant = 200 g
After the decay process, the quantity remaining is equal to 25 g.
By plugging data into the equation above, we can get the rate constant.
\(k=\frac{2.303}{11.46} \log \frac{200}{25}=0.1814\)
We now need to determine a radioisotope's half life.
Formula used : \(t_{1 / 2}=\frac{0.693}{k}\)
We obtain the half life by entering the value of "k" into this calculation.
\(t_{1 / 2}=\frac{0.693}{0.1814}=3.820\)
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The complete question is-
What is the half-life of a radioisotope if 25.0 grams of an original 200.-gram sample of the isotope remains unchanged after 11.46 days?
(1) 2.87 d
(2) 11.46 d
(3) 3.82 d
(4) 34.38 d
create a list of at least 5 reasons to avoid alcohol during adolescence.
Answers
People who are younger are usually at greater risk of alcohol related harm at a younger age. the younger you are when you drink alcohol, it can lead to you developing damage in your brain as well as problems later in life. drinking at a young age can lead to things like an inability to learn, problems with verbal skills, being dependent on alcohol, and depression.
In the periodic table, which elements typically have similar properties?
A. Those in the same rows.
B. Those related diagonally.
C. Those in the same columns.
D. Those on opposite sides.
Answers
Elements in the same group, or column, in the periodic table typically have similar properties. This is because they have the same number of valence electrons, which determine the chemical behavior of an element.
In the periodic table, elements are arranged in rows called periods and columns called groups. Elements in the same group, or column, typically have similar properties. This is because elements in the same group have the same number of valence electrons, which are the electrons in the outermost energy level of an atom. Valence electrons determine the chemical behavior of an element. Elements in the same group have similar chemical reactivity and tend to form similar types of compounds.
For example, all the elements in Group 1 (the alkali metals) have one valence electron and are highly reactive. They react vigorously with water and oxygen. Similarly, all the elements in Group 17 (the halogens) have seven valence electrons and are also highly reactive. They readily form compounds with metals.
On the other hand, elements in the same period, or row, do not necessarily have similar properties. The properties of elements change as you move across a period from left to right. This is because the number of energy levels and the number of valence electrons change as you move across a period.
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Elements in the same group, or column, in the periodic table typically have similar properties. This is because they have the same number of valence electrons, which determine the chemical behavior of an element.
In the periodic table, elements are arranged in rows called periods and columns called groups. Elements in the same group, or column, typically have similar properties. This is because elements in the same group have the same number of valence electrons, which are the electrons in the outermost energy level of an atom. Valence electrons determine the chemical behavior of an element. Elements in the same group have similar chemical reactivity and tend to form similar types of compounds.
For example, all the elements in Group 1 (the alkali metals) have one valence electron and are highly reactive. They react vigorously with water and oxygen. Similarly, all the elements in Group 17 (the halogens) have seven valence electrons and are also highly reactive. They readily form compounds with metals.
On the other hand, elements in the same period, or row, do not necessarily have similar properties. The properties of elements change as you move across a period from left to right. This is because the number of energy levels and the number of valence electrons change as you move across a period.
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How high would a column of mercury rise in a mercury barometer if the atmospheric pressure is at 0.25 atm
Answers
The column of mercury will rise in a barometer upto 190 mm Hg.
What is the concept of pressure conversion?It is possible to change the unit of pressure. Additionally, pressure can be described as the height of a mercury column. It equates to a height of 760 mm Hg at 1 atmosphere of pressure.
What is Barometer?An instrument known as a barometer is used to measure the air pressure in a specific environment. Weather changes in the short term can be predicted by pressure tendency. Surface weather analysis uses a variety of air pressure data to assist identify surface troughs, pressure systems, and frontal borders.Calculation of height of mercury in Barometer:We are aware that 760 mm Hg equals 1 atmospheric pressure. This conversion factor will be used to calculate the height of mercury at 0.25 atm.
h = 0.25 atm (760 mm Hg/1 atm)
h = 190 mm Hg
Hence , the column of mercury rise in a mercury barometer will rise upto 190 mm Hg.
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What phrase describes a good scientific question?
has a wide focus
addresses a gap in knowledge
does not lead to a testable hypothesis
O has a simple yes or no answer
vious Activity
Answers
Would love some help pleaseee. and please at least read the question instead of skipping it please.
Measuring tools can have errors. Errors lead to ___________________ results and _______________ conclusions. To calculate the difference of the accepted value and the experimental value, scientists use this formula:
percent error = (experimental value − ) × 100. accepted value
Minimizing Bias
People show bias when they want everyone to accept their results. Bias can arise for many reasons:
• Companies show bias when they depict only the research details that are in the best interest of their ____________.
• Scientists may be biased toward their _____________ and modify results suit their needs.
• Scientists may also show to bias get their research published in ______________ ______________.
Such biases often lead to _______________ facts. An important part of scientific thinking is identifying biases and taking the necessary steps to minimize them.
For results to be considered scientifically accurate, any scientist, regardless of his or her own bias, should be able to replicate the experiment and get the same results.
Summary
Think of some studies you’ve heard about. How can you tell whether the studies were well-designed and scientifically accurate or had biases?
Answers
Answer: this looks like your homework
Explanation:if you want help you are going to have to ask a specific question instead of giving people your homework.
Answer:
Honestly I would search this up maybe there might be a pdf with the answers. Sorry chemistry isn't my thing:(
Explanation:
what is loamy soil ?
Answers
Answer:
Loam is soil composed mostly of sand, silt, and a smaller amount of clay. By weight, its mineral composition is about 40–40–20% concentration of sand–silt–clay, respectively.
Explanation:
Match the process to the energy transformation
Answers
These are just a few examples of energy transformations associated with different processes. Energy transformations occur in various forms throughout nature and technology, and understanding them is crucial for studying energy systems and their impacts on the environment and society.
Here are some common energy transformations and their associated processes:
Combustion:
Process: Burning of fossil fuels such as coal, oil, or natural gas.
Energy Transformation: Chemical energy in the fuel is converted into thermal energy (heat) and light energy.
Photosynthesis:
Process: Occurs in plants, where they convert sunlight, carbon dioxide, and water into glucose (chemical energy) and oxygen.
Energy Transformation: chemical energy is transformed into chemical energy stored in glucose.
Cellular Respiration:
Process: Takes place in cells, breaking down glucose and other organic molecules to release energy.
Energy Transformation: Chemical energy stored in glucose is converted into ATP (adenosine triphosphate), which is a form of usable energy for cells.
Electric Power Generation:
Process: Power plants use various methods (such as coal, nuclear reactions, or renewable sources like wind or hydro) to generate electricity.
Energy Transformation: The energy source (e.g., fossil fuels, nuclear reactions, or renewable sources) is converted into electrical energy.
Solar Panels:
Process: Solar panels capture sunlight using photovoltaic cells and convert it into electricity.
Energy Transformation: Solar energy is transformed into electrical energy.
Nuclear Fission:
Process: In nuclear power plants, the process of splitting atoms (fission) is used to release a tremendous amount of energy.
Energy Transformation: Nuclear potential energy is converted into thermal energy, which is then used to generate electricity.
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PLEASE HELP ME PLEASE I NEED THE ANSWER QUICK
Answers
Answer:
d
Explanation:
What is the relationship between a solution and a mixture.
Answers
Answer: In a mixture, substances are generally just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be filtered out.
Explanation:
¿Cómo se llama el proceso en donde se transforma el oxígeno en dióxido de carbono
Answers
Answer:
respiración
Explanation:
Write the chemical formula for disilicon hexabromide.
Answers
Answer:
Br6Si2
Explanation:
The chemical formula for disilicon hexabromide is Si₂Br₆.
The chemical formula of a compound is a symbolic representation of its chemical composition.
Chemical formulae gives information about the elements that constitute the molecules of a compound and also about the ratio in which the atoms of these elements combine to form such molecules.
Every constituent component in a chemical formula is identified with its chemical symbol, along with the relative number of atoms that make up each element.
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What happens when an object reaches a state of thermal equilibrium
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write equation of 1. methanol and ethanoic acid 2.ethanol and butanoic acid
Answers
Answer:
(1) methanol is also known as methyl alcohol.
CH3-OH
term "meth" means one that's why only one carbon atom are there.
(2) Ethanoic acid has the functional group of carboxylic acid which is (-COOH).
The term "eth" means two that's why two carbon atoms are there.
CH3-CH2-COOH
(3) Ethanol is an alcohol that has a functional group of alcohol that is (-OH)
The term "eth" means two that's why two carbon atoms are there.
CH3-CH2-OH
(4) Butanoic acid is a carboxylic acid that has a functional group of (-COOH)
The term "But" means four that's why four atoms of carbon are there.
CH3-CH2-CH2-COOH
The question must be Write the formula of
1. Methanol
2. ethanoic acid
3 ethanol
4. butanoic acid
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Determine the amount of energy absorbed by 2.00 L of gasoline as it is converted to the vapor phase at its boiling point.
Answers
The amount of energy absorbed by 2.00 L of gasoline as it is converted to the vapor phase at its boiling point is 22606 J.
What is enthalpy of vaporization?We know that;
1 mole of gasoline occupies 22.4 L
x moles of gasoline occupies 2 L
x = 0.089 moles
Then we have that the mass of the gasoline = 0.089 moles * 100 g/mol
= 8.9 g
Then;
H = mL
L = 2540 J/g for gasoline
Thus the energy that is absorbed is;
H = 8.9 g * 2540 J/g
H = 22606 J
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7. C2H4O2 is what? vinegar
Answers
Answer:
Yes its vinegar
Explanation:
Actually \( \bold{\red {C_2H_4O_2}} \) is the formula for acetic acid which is found in vinegar.
What is the compound N₂O3 called?
Answers
Answer:
Explanation:
Dinitrogen trioxide is a nitrogen oxide. Nitrogen trioxide appears as a blue liquid with a sharp, unpleasant chemical odor.
Description: Dinitrogen trioxide is a nitrogen oxide.ChEBINitrogen trioxide appears as ...
Synonyms: Dinitrogen trioxideNITROGEN TRIOXIDENitrogen oxide (N2O3)10544-7...
Molecular Formula: N2O3
Molecular Weight: 76.012 g/mol
Answer:
It is called Dinitrogen trioxide. Hope this helps!
When Mg bonds with S, which of the following is true?a. Mg and S are in a "sea of electrons."b.Mg and S share two electrons.c. Mg gains two electrons, while S loses two electrons.d. Mg loses two electrons, while S gains two electrons.
Answers
Answer: Magnesium loses two electrons whilst sulfur gains tw
Contrast ionization energy from electron affinity.
Answers
Answer:
Ionization energy : energy required to take out an electron from the valance orbital of an atom.
Electron affinity: electron affinity of an atom measures the amount of energy released when an electron is forcibly entered or pushed into the valence orbital of an atom.
Ionization energy is the energy required to make an atom into a positive ion. Electron affinity is the energy released when an atom becomes a negative ion.
ionization energy is what is required to remove one electron from a normal gaseous atom to produce a +1 anion of that atom.
electron affinity is the energy required to remove one electron from a gaseous -1 anion of an atom to produce a normal gaseous atom.
Suppose you put a teaspoon of sugar into a glass of water and stir. The sugar seems to disappear, but you can still taste it when you drink the water. What did you create?
A. a suspension
B. a compound
C. a solution
D. an element
Answers
Answer:
C
Explanation:
the element gallium has two naturally occurring isotopes, 69ga and 71ga. the atomic mass of 69ga is 68.9256 amu and the atomic mass of 71ga is 70.9247 amu. 69ga comprises 60.11% of naturally occurring gallium. what is the average atomic mass of gallium in amu?
Answers
The average atomic mass of gallium is 69.6224 amu. To calculate the average atomic mass of gallium, we need to take into account the percentage abundance of each isotope.
Given that 69Ga makes up 60.11% of naturally occurring gallium, we can assume that 71Ga makes up the remaining 39.89%. We can then calculate the weighted average of the two isotopes using their respective atomic masses and percentages.
Average atomic mass of gallium = (0.6011 x 68.9256 amu) + (0.3989 x 70.9247 amu)
= 41.3655 + 28.2569
= 69.6224 amu
Therefore, the average atomic mass of gallium is 69.6224 amu.
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