We used the formula percentage of iron magnetite=(Mass of Fe/Mass of Fe3O4)100%. We then calculated the percentages of iron magnetite (68%) and oxygen magnetite (32%).
Magnetite is a mineral and one of the most important iron ores, with the chemical formula Fe2+Fe3+2O4. It is a ferrimagnetic iron oxide that is attracted to a magnet and can be magnetized to become a permanent magnet. With the exception of extremely rare native iron deposits, it is the most magnetic of all naturally occurring minerals on Earth. Naturally magnetized pieces of magnetite, known as lodestone, will attract small pieces of iron, which is how ancient peoples discovered magnetism.
Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5-6, and leaves a black streak. Magnetite grains are very common in igneous and metamorphic rocks.
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will give brainly NEED CHEM HELP
Answer:
X- HCl
Y- NaOH
Z- NaCl
Explanation:
An acid turns blue litmus paper red, exhibits low pH(due to high concentration of hydrogen ions) and also react with magnesium as follows;
2HCl(aq) + Mg(s)-------> MgCl2(aq) + H2(g)
A base turns red litmus paper blue, exhibits a high pH (due to low concentration of hydrogen ions) and does not react with magnesium.
A salt does not react with litmus paper, exhibits a neutral pH of 7 and does not react with magnesium.
What is the variable in an experiment?
A the glass tubes you use
B the questions you ask
C the thing you want to test
D the part that stays the same
One mole of methane (CH4) and one mole of oxygen (O 2) would have the same number of atoms. Question 9 options: True False
This statement is false.
One mole of methane (CH4) contains one atom of carbon and four atoms of hydrogen, for a total of five atoms. On the other hand, one mole of oxygen (O2) contains two atoms of oxygen, for a total of two atoms. Therefore, one mole of methane and one mole of oxygen do not have the same number of atoms.
It's important to note that a mole is a unit of measurement that corresponds to the Avogadro's number of atoms, ions or molecules of a substance, which is 6.022 x 10^23 atoms, ions or molecules. That means that one mole of a substance has the same number of atoms, ions or molecules but not always the same number of elements.
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What are 3 elements that are highly reactive?
The three elements that are highly reactive belongs to alkali metals i.e., s-block elements that are lithium, sodium and potassium.
The elements that belongs to s block elements are hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The nature of alkali metals is soft and shiny in appearance. They have low melting point and are highly reactive in nature and usually tarnish when exposed to air. Sodium (Na) is the most reactive element since it's valence electrons are not tightly held together in the atom. The three elements that are highly reactive are Lithium (Li), Sodium (Na), and potassium (K). The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive
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What do the total charges need to add to in order to write an ionic formula?
Answer:
Explanation:
When metal and nonmetal ions form ionic bonds, their total electrical charges must balance each other exactly (as in, add up to zero). In order to write a correct formula, you must know the ion charges of all the atoms involved.
2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g)
If 39.3g of As reacts with excess NaOH at STP, what volume of H2 will be produced in liters?
According to stoichiometry and STP conditions ,1785.90 liters of hydrogen is produced.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given reaction as per stoichiometry, 149.84 g of As produces 6 g hydrogen , thus, 39.3 g of As will produce 39.3×6/149.84=1.573 g.
As per STP conditions, V=1.573/2×8.314×273/1=1785.90 liters.
Thus, 1785.90 liters of hydrogen is produced.
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In the star's center, the gas is so energized that it has become a sort of super gas, called plasma. The hot plasma is in constant motion. It expands like hot air inside a balloon and pushes outward from the center. Meanwhile, the crushing weight of the star material continues to press inward. In goes the outer material and out goes the inner. The plasma rolls and churns like a hyper hurricane of heat, light, sound, and motion. —A Black Hole Is NOT a Hole, Carolyn Cinami DeCristofano Which question would be a relevant to ask about this text? Why does the plasma in a star expand? Where can I take a hot-air balloon ride? Will there be a hurricane next week?
Answer:
A
Explanation:
Trust me I take the Quiz
A(n) ____________________ has more hydrogen ions than hydroxide ions and has a pH ____________________ 7.
An acidic solution has a pH over 7 and contains more hydrogen ions than hydroxide ions. Any aqueous solution with a pH lower than 7.0 ([H+] more than 1.0 x 10-7M) is said to be acidic.
A acidic solution that uses water as its solvent is said to be aqueous. Acidic solutions are sour in contrast to alkaline solutions, yet it's never a good idea to taste an unidentified solution. Any solution that contains more hydrogen ions per volume of solution than water is an acidic solution; contrasted with acidic solutions are basic or alkaline solutions. Atomic number 1 and the letter H stand for the chemical element hydrogen. The element hydrogen is the lightest.
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How many molecules are in 10.0 g of aspartame?
There are 0.034 x 1019 = 10¹⁹ moles of molecules in 10 g of aspartame.
Avogadro's constant, 6.022 1023, and the molar mass of the material are used to calculate the number of molecules in a given mass of the substance. Aspartame's molecular formula is C14H18N2O5.
Aspartame has a molecular mass of 294 (12 * 14 + 1 * 18 + 14 * 2) + 16 * 5)
Let's convert the 10 mg mass supplied to aspartame moles as follows:
Amount of moles =
= 0.034 × 10 ⁻⁵ mole
We may convert this number to molecules using Avogadro's constant as follows:
= 0.034 × 10 ⁻⁵ (6.022 × 10²³)
= 0.034 × 10¹⁹
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If 2.65 mol of O2 gas has a volume of 49.0 L at 180 C, what is the pressure of the gas?
Answer:
2.01atm
Explanation:
calculate the solubility of AgCN in a solution containing 1.0M H Ksp of AgCN is 2.2e-12 Ka of HCN is 6.2e-10
The solubility of AgCN in a solution containing 1.0M H Ksp of AgCN is 2.2e-12 Ka of HCN is 6.2e-10 is 5.9 x 10^-2M.
Given concentration of H+ (M) = 1.0M
Ksp of AgCN = 2.2e-12
Ka of HCN = 6.2e-10
AgCN ⇋ Ag+ +CN− ................Ksp
CN − + H+ ⇋ HCN................... 1/Ka
AgCN + H+ ⇋ HCN + Ag+ ...................Ksp/Ka = K0
K0 = 2.2e-12/6.2e-10 = 0.0035 = 35 x 10-4
At Equilibrium: AgCN + H+ ⇋ HCN + Ag+
Let the moles of [Ag+] = x
So the number of moles of [HCN] = x
K0 = [Ag+] [HCN] / [H+]
35 x 10-4 = x^2/1
x = 5.9 x 10^-2M
Hence the molar solubility of AgCN in buffer solution is 5.9 x 10^-2M.
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A baketball ha a momentum of 6. 0 kg m/ outh and a ma of 0. 15 kg what i the baketball velocity
The basketball velocity is 40 m/s.
What is velocity?A vector quantity with both size and direction is velocity. In respect to time, it is the rate with which a displacement changes. Using the formula velocity = displacement/time, velocity may be computed. It is a way to gauge how quickly something is moving in a certain direction. Acceleration, or the rate at which an object's velocity changes, is closely related with velocity. Being a vector quantity, velocity has both a direction and a magnitude. An object must move at the a constant speed and in the same direction in order to maintain a constant velocity.
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When stomach acid helps to break down food into smaller particles this is
an example of a change.*
O Physical
Chemical
O
Elemental
о
Atomic
Answer:
chemical, is the answer your looking for
7.92g of FeSO4 • 6H2O is equal to how many molecules?
7.92g of FeSO4 • 6H2O is equal to 1.55 x 10^23 molecules.
What is molecules?Molecules are the smallest units of matter that can exist by themselves. They are composed of two or more atoms that are held together by chemical bonds. Molecules can be found in the air we breathe, the water we drink, and the food we eat. They can also be found in living organisms, like plants and animals. Molecules can be made of a variety of different atoms, such as oxygen, carbon, nitrogen, and hydrogen. They also come in different shapes and sizes, depending on the types of atoms they are composed of.
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convert formic acid into methane
Which of the following properties of covalent compounds are influenced by ionic character?
a. melting point
b. boiling point
c. viscosity
d. all of the above
The property of the covalent compound that is influenced by ionic character is boiling point. Option B
What is the ionic character?We know that for compounds, the kind of bonds that they have are usually neither here nor there. The bonds would have an ionic character and also a given amount of the covalent character.
We must note that the ionic character of a bond is very important when we discuss intermolecular interactions and they do affect the boiling points of the substances very much.
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You move a 12-newton box 6 meters across the floor. How much work have you done?
The amount of work that has been done would be 72 Joules.
What is work done?The work done by a body can be defined as the amount of energy transferred from one body to another body. In other words, work is the product of force and the distance moved by the force.
This can be expressed mathematically as:
Work = force x distance moved by the force.
In this case:
Force = 12 newton
Distance = 6 meters
Work done = 12 x 6
= 72 NM or 72 Joules
In other words, if I move a 12 Newton box by 6 meters across the floor, the amount of work done would be 72 Joules.
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The potential danger involved with ingesting certain compounds is associated with their solubility in the body's aqueous environment. Which of the following would be most soluble in water ?
A.CH3CH2OH
B. CH3CH2CH2OH
C. CH3OCH2CH3
The solubility of a compound in water is determined by the type of chemical bonds present in the compound and the polarity of the molecule. Thus option B is the correct answer.
Compounds that are polar and have hydrogen bonding capability are more likely to be soluble in water.
In this case, Propanol (CH3CH2CH2OH) has a polar -OH group, which makes it able to form hydrogen bonds with water molecules, and therefore it would be more soluble in water than the other two compounds.
The other two compounds, CH3CH2OH (Ethanol) and CH3OCH2CH3 (Dimethyl ether), also have polar groups, but propanol has the most polar -OH group which is why it would be the most soluble in water.
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What happens to the reactivity as you move from left to right?
The reactivity of the element in the periodic table as me move from the left to right in the period it will decreases first and then it will increases.
In the periodic table , for the metals the reactivity of the decreases as we move across the period from left to the right. in the group it will increases as we move from the top to bottom.
In the periodic table for the non metals, the reactivity will increases as we move from left to the right in a period. in the group it will decreases as we move from top to the bottom.
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S3o5 chemical compound
Answer:
Stainless SteelExplanation:
Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless SteelAnswer:
Sulfure 3
Oxygen 5
Explanation:
The S stands for Sulfure. And the stands for Oxygen. If you meant the name then its Trisulfur Pentoxide
hopefully that's what you meant.
The movement of tectonic plates is so slow and gradual that you cannot see or feel them moving. As a result, scientist depend on the global positioning system (GPS) to verify tectonic plate motion. Satellites can measure the small distances that GPS ground stations move over time. In what units is the movement of tectonic plates measured? Group of answer choices.
Answer:
centimeters per year
Explanation:
Diatomic elements are important. what makes them different from other elemental substances?
Diatomic elements are elements that exist as two atoms bound together, usually in the form of a molecule.
What is Diatomic?Diatomic molecules are molecules composed of two atoms, held together by chemical bonds. They are the simplest type of molecule, and are very common in nature. Examples of diatomic molecules include oxygen (O2), nitrogen (N2), hydrogen (H2), chlorine (Cl2), and iodine (I2). Diatomic molecules have a wide range of applications in various industries, such as medicine, chemistry, engineering, and energy.
This differs from other elemental substances because those substances contain only one atom. Diatomic elements are very common in nature and make up a large percentage of the atmosphere. They also have unique properties because of the two atoms being bound together. Diatomic elements are an important part of many everyday processes, from respiration to combustion to corrosion.
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how to balance
_k+_H2O ➡️ KOH + _H2
Answer:
2K + 2H2O ---> 2KOH + H2
Explanation:
Answer:
2k+2H2O ➡️2KOH + H2.....
HELP ASAP QUESTION 13
Answer:
1. 208
2. 82
3. Pb
Explanation:
²¹²₈₄Po —> ⁴₂He + ᴬZX
1. Determination of mass number A of the new atom.
212 = 4 + A
Collect like terms
212 – 4 = A
208 = A
A = 208
Thus, the mass number is 208
2. Determination of the atomic number Z of the new atom.
84 = 2 + Z
Collect like terms
84 – 2 = Z
82 = Z
Z = 82
Thus, the atomic number is 82.
3. Determination of the symbol of the new atom.
ᴬZX => ²⁰⁸₈₂X
The atomic number of the new atom is 82. Comparing the atomic number of the new atom to those in the periodic table, the new atom is lead with symbol Pb.
Thus,
²⁰⁸₈₂X => ²⁰⁸₈₂Pb
Therefore, the symbol of the new atom is Pb.
3. Which type of bonding forms due to electrical attractions between oppositely charged
elements?
a. Covalent
b. lonic
c. Metallic
d. Subshell
Answer:
Hello There!!
Explanation:
The answer is b. lonic.
hope this helps,have a great day!!
~Pinky~
What are the correct formal charges for nitrogen atoms I, II, and III, respectively, in the azide below
Formal charge for nitrogen atoms I, II, and III, respectively in the azide provided is 0, +1, and -1
A formal charge, in the covalent chemical bonding, refers to the hypothetical charge assigned to an atom in a molecule, based on the assumption that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity. In other words, formal charge is defined as the difference between the number of valence electrons of an atom in a neutral free state and the number assigned to that atom in a Lewis structure. It is given as
Formal charges = Group variance – nonbonding electrons – ½ bonding electron
For the nitrogen atom I,
Formal charges =5 – 2 – ½ (6) = 0
For the nitrogen atom II,
Formal charges =5 – 0 – ½ (8) = 1
For the nitrogen atom III,
Formal charges =5 – 4 – ½ (4) = -1
Note: The question is incomplete as it is missing the figure which is attached.
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How many total ATP are produced during glycolysis ?
During glycolysis, each G3P produces two ATP, for a total of four ATP per glucose molecule.
What is glycolysis?The metabolic mechanism that transforms glucose to pyruvate is known as glycolysis. This free energy is utilized to create the high-energy molecules adenosine triphosphate and reduced nicotinamide adenine dinucleotide. Glycolysis is a series of 10 enzyme-catalyzed processes. The initial stage in the breakdown of glucose to extract energy for cellular metabolism is glycolysis. Glycolysis is divided into two phases: energy-requiring and energy-releasing. Glycolysis is the process of breaking down glucose to create energy. It generates two pyruvate molecules, ATP, NADH, and water. The process occurs in a cell's cytoplasm and does not require oxygen. It can be found in aerobic and anaerobic organisms.
Here,
Each G3P produces two ATP during glycolysis, for a total of four ATP per glucose molecule.
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what is the chemical formula for copper in chemistry?
Answer:
Cu
Copper is a chemical element with the symbol Cu and atomic number 29.
...
7.1Element Forms.
Explanation:
Answer:
Hey mate.....
Explanation:
This is ur answer.....
CuHope it helps!
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which of the following molecules has the most polar bond between the bonded atoms in terms of greatest and hf hcl hbr hl
HCl is the most polar due to the high electronegativity of Cl.
Hydrogen chloride is a diatomic molecule, composed of a hydrogen atom, H, and a chlorine atom, Cl, joined by a polar covalent bond. The bond is a polar covalent bond because the chlorine atom is much more electronegative than the hydrogen atom.
Positively charged protons in the nucleus attract negatively charged electrons. As the number of protons in the nucleus increases, the electronegativity, or attractive force, increases. Therefore, electronegativity increases in a row from left to right on the periodic table.
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The poles of an electromagnet can even be reversed by reversing the flow of electricity true or false
By reversing the flow of electricity, the poles of an electromagnet may be reversed. As a result, the following statement is true.
An electromagnet is a magnet that uses electricity to operate. In contrast to a permanent magnet, the strength of an electromagnet may be readily altered by varying the amount of electric current flowing through it. By reversing the flow of electricity, the poles of an electromagnet can even be reversed.
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