2KClO3-->2KCl+3O2
How many grams of potassium chloride (KCl) are produced from 45.0 g KClO3?

Answer:

Hydrogen is the first element in the periodic table. Oxygen is the eighth element in the periodic table.

Both elements are gases.

Hydrogen is used for the Haber process and rocket fuel.

Oxygen is used for breathing and production purposes.

Air composes 21% oxygen and 0.0001% hydrogen.

Water is an example that contains both hydrogen H2 and oxygen O2 molecules.

Answer:

Hydrogen is the chemical element with the Symbol H and atomic number 1.

Hydrogen is the lightest element in the periodic table and it is the most abundant in the universe.

                                                 WHILE:

Oxygen is the chemical element with the symbol O and the atomic number 8.

It is a member of the chalcogen group in the periodic table.

This is what we humans take in to breathe that gives us life.

Answer:

C) Lipids and Carbohydrates

Explanation:

Lipids, or fats, are stored long-term for energy when an organism cannot find carbohydrates (specifically glucose), which are used as short-term energy.

The statement you provided refers to the determination of the van't Hoff factor (i) for strong electrolytes. The van't Hoff factor represents the number of ions produced per mole of solute dissolved in a solution.

For example, when calcium chloride (CaCl2) dissolves, it dissociates into three ions: one Ca2+ ion and two Cl- ions. Therefore, the van't Hoff factor (i) for CaCl2 is 3 because it produces three ions per mole of solute dissolved.

Similarly, when ammonium phosphate (NH4)3PO4 dissolves, it dissociates into four ions: three NH4+ ions and one PO43- ion. Thus, the van't Hoff factor (i) for (NH4)3PO4 is 4 because it yields four ions per mole of solute dissolved.

The van't Hoff factor is essential in various calculations related to colligative properties, such as boiling point elevation and freezing point depression, where it is used to account for the number of particles in solution.

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Answer:

person and earth since they are closer to the core ? maybe

Answer:

D. Ionic compound

Explanation:

Just based on my opinion

Correct me if I'm wrong tnx:<

Dihydrogen monoxide is a covalent compound. Option A is correct.

Covalent compounds are compounds that are held together by covalent bonds. Covalent bonds are formed when two atoms share electrons. In dihydrogen monoxide, the two hydrogen atoms share a pair of electrons with the oxygen atom. This forms a molecule of water, which is a covalent compound.

Ionic compounds are compounds that are held together by ionic bonds. Ionic bonds are formed when one atom donates electrons to another atom. In an ionic compound, the electrons are not shared, but are transferred from one atom to another. The molecular formula for dihydrogen monoxide is H₂O.

The difference between a molecular formula and an empirical formula is that the molecular formula shows the actual number of atoms of each element in a molecule, while the empirical formula shows the simplest ratio of the atoms of each element in a molecule. Option A is correct.

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Answer:

Nickel has a total of 28 electrons.

Explanation:

Answer:

Anything related to science needs to be detailed and understood by a range of people. Or, what they published may not create any impact if you can't read it and understand what you just read.  

Explanation:

Answer:

Option B. Only one of the compounds is an alkane

Explanation:

To know which option is wrong us, we simply determine the class to which each diagram belongs.

Diagram 1:

CH4 is called methane and it is a member of the alkane series which are saturated hydrocarbon.

Diagram 2:

CH3CH3 is called ethane and it is a member of the alkane series which are saturated hydrocarbon.

Diameter 3:

CH2=CH2 is called ethene and it is a member alkene series which are unsaturated hydrocarbon.

Diagram 4:

CH3CH2OH is called ethanol which is a member of the alcohol family. CH3CH2OH is also a saturated alcohol as it only contains single bonds.

From the above, we can see that:

1. Only one compound is alcohol i.e CH3CH2OH.

2. There are two members of the alkane series i.e CH4 and CH3CH3.

3. Only one compound is unsaturated i.e CH2=CH2. Unsaturated compound has one or more double bond.

4. Only three compounds are hydrocarbon i.e CH4, CH3CH3 and CH2=CH2. Hydrocarbons are compounds containg only carbon and hydrogen.

Therefore, option B is wrong as there are two members of the alkane present.

Answer:

Helium atom

Explanation:

For the RTGs flown by the United States, the radioisotope has been some chemical form of plutonium-238 (238Pu or Pu-238). Plutonium-238 decays primarily by the emission of an alpha particle (a helium atom without its electrons).

Answer:

Electrons, Protons, and Neutrons. ... Protons are another type of subatomic particle found in atoms. They have a positive charge so they are attracted to negative objects and repelled from positive objects. Again, this means that protons repel each other

We are unable to replace salt with sugar. Many soluble carbohydrates with a sweet flavour and that are used in food are collectively referred to as sugar.

In addition to fructose, simple sugars also go by the name monosaccharides. also galactose. Disaccharides or double sugars are other names for compound of carbohydrates. Rock salt, also known as carbohydrates, is a naturally occurring crystalline mineral that is made up mostly of sodium chloride (NaCl), a chemical molecule that is a member of the larger class of salts. In seawater, salt is found in enormous amounts.

Seawater, where it makes up the majority of the minerals, contains a significant amount of it. Animal life cannot exist without salt, and humans' basic tastes include saltiness.

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The given statement "pyrophoric substances can burn spontaneously in air." is true as pyrophoric materials are those that spontaneously ignite when ignited and exposed to air.

A chemical that spontaneously ignites in air at a temperature of 130 °F (54.4 °C) or lower is referred to as a pyrophoric gas. Chemicals classified as pyrophoric will spontaneously ignite in air at 130°F (54.4°C) or lower. Pyrophores frequently burn up in the presence of air due to a strong reaction with oxygen or water vapor.

Pyrophoric materials are those that spontaneously ignite when ignited and exposed to air. A brief overview of pyrophoric materials and flame safety is provided here. Materials classified as pyrophoric ignite instantly when exposed to oxygen. They may also react with water, producing heat and hydrogen (a flammable gas).

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Impurity atoms in ceramic materials may form substitutional and interstitial solid solutions is True.

Ceramic materials are an inorganic compound of metals and nonmetals. Impurities in ceramic materials can be intentionally added to improve the properties of the materials. The impurities in the ceramic materials may form substitutional and interstitial solid solutions.

Substitutional solid solution refers to a type of solid solution in which the impurity atoms substitute the host atoms of the crystal lattice while retaining the crystal structure. Interstitial solid solution refers to a type of solid solution in which impurity atoms occupy the interstitial sites in the crystal lattice of the ceramic material, but the crystal structure changes slightly due to the presence of impurity atoms.

The concentration of impurities can vary up to 150 ppm (parts per million).

Therefore, the statement "Impurity atoms in ceramic materials may form substitutional and interstitial solid solutions" is True.

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The mass of 0.5 mole of the element is approximately 6.025 grams.

To calculate the mass of 0.5 mole of the element, we need to know the molar mass of the element.

Given that the mass of 2 x 10^21 atoms of the element is 0.4 grams, we can use this information to find the molar mass.

The number of atoms in 1 mole of any substance is given by Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

First, we calculate the molar mass of the element using the given information:

Molar mass = Mass of 2 x 10^21 atoms / Number of moles of 2 x 10^21 atoms

Molar mass = 0.4 g / (2 x 10^21 atoms / (6.022 x 10^23 atoms/mol))

Molar mass ≈ 0.4 g / (3.32 x 10^-2 mol)

Molar mass ≈ 12.05 g/mol

Now that we know the molar mass of the element is approximately 12.05 g/mol, we can calculate the mass of 0.5 mole of the element:

Mass = Molar mass x Number of moles

Mass = 12.05 g/mol x 0.5 mol

Mass = 6.025 grams

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Answer:

2C2H6(g)+7O2(g)→4CO2(g)+6H2O(l)

Explanation:

When ethane is burned in presence of oxygen, it produces carbon dioxide (CO_2)(CO2) and water (H_2O)(H2O) .

According to law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of reactants must be equal to the mass of products.

In order to get the same mass on both sides, the number of atoms of each element on product side must be same as the number of atoms of each element on reactant side.Thus the equations are balanced.

2C_2H_6(g)+7O2(g)\rightarrow 4CO_2(g)+6H_2O(l)2C2H6(g)+7O2(g)→4CO2(g)+6H2O(l)

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Comparison of techniques for GABA-edited MR spectroscopy data spectral alignment and signal modeling.

There are many ways to align and quantify magnetic resonance spectroscopy (MRS) data in order to assess -aminobutyric acid in vivo (GABA). Because there are few ground-truth measurements available, there is little research comparing the performance of different approaches. In comparison to white matter, the concentration of GABA is almost twice as high in grey matter.

Here, we assess the performance of four spectral alignment approaches (i.e., retrospective frequency and phase drift correction) and six GABA signal modeling methods using the percentage of grey matter present in the MRS voxel as a proxy for ground-truth GABA concentration.

The alignment to the creatine (Cr) signal generates GABA+ estimates that account for around twice as much of the diversity in grey matter as the next highest performing alignment approach, according to our analysis of a broad dataset of 432 MEGA-PRESS scans targeting several brain areas.

Additionally, Cr alignment produced the fewest outliers and was the strongest. As opposed to this, all signal modeling techniques—aside from the single-Lorentzian model—performed equally well.

Our findings indicate that rather than frequency originating from first-order phase offsets within subspectra, performance variability is predominantly caused by variances in the zero-order phase calculated by each alignment method.

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Temperature constant, Boyle's law

P₁V₁=P₂V₂

3.15 = P₂.7

P₂=6.43 atm

The formula of a compound is written based on the valency of each bonded atoms. The formulas  Mg₂(SO₄)₃, Rb₃As are incorrect. Such compounds does not exist.

The formula of a chemical compound is written based on the number of atoms participated in bonding.   Magnesium is second group element having two valence electrons.

Magnesium thus donates its two electrons into the bonding atom or group. The sulphate group SO₄ have a valency of 2 it gains two electrons from Mg when bonded.

Thus the formula of magnesium sulphate being MgSO₄ and not Mg₂(SO₄)₃. Similarly Rb is a second group metal having two valence electrons. Its valency being two. As is a halogen with valency one. Thus they cannot form a compound like Rb₃As.

Hence, option a and b are incorrect formulas.

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B is the answer ,ammonium accepts a proton and becomes ammonium ion

Answer:

The empirical formula for propane is C3H8.

Answer:

Because propane is made up of only hydrogen and carbon _ the chemical formula is C3H8..

Answer:

The same number of each element present before the reaction takes place must also be present on the product side of the equation. Coefficients are placed in front of a chemical formula to show the number of moles of that substances that are necessary for the reaction to occur.

Explanation:

Sand and water can be separated by any of the following methods:

1. Sedimentation and decantation: This method involves the mixture being kept undisturbed for some time. After some time, sand being heavier and insoluble in water, settles down at the bottom of container. Now, water is poured into another container to separate it from sand.

2. Filtration: This method involves the mixture being passed through a filter paper (a filter with very fine pores). Sand particles being larger in size are retained by the filter paper and get separated from water.

I hope this helps! :D

Answer:B

Explanation: A chemical change is something that is irreversible

Answer:

The answer is D

Explanation:

The answer is D because the apple went from being cold to the temperature of the room. No chemicals or anything were done to the apples. They were just set on the counter so this is a physical change. The apples turning room temperature was the cause of the apples turning brown, so the best answer is D.

Answer:

Carbon-13

Explanation:

Carbon have three isotopes. Isotopes are the atoms of the same element which has a different number of neutrons. Carbon has 3 isotopes.

Carbon-12 : 6 electrons I 6 protons I 6 neutrons

Carbon-13 : 6 electrons I 6 protons I 7 neutrons

Carbon-14 : 6 electrons I 6 protons I 8 neutrons

The amount of 6M H₂SO₄ to produce 25 grams of H₂ is 2.08 L.

The reaction of aluminum and sulfuric acid is,

2Al + 3H₂SO₄ = Al₂(SO₄)₃ + 3H₂

So, as we can see, from the reaction,

3 moles of H₂SO₄ produces 3 moles of H₂.

So, we can write,

Moles of H₂SO₄ = moles of H₂

Moles = molarity × volume

Moles = Given mass/molar mass

(Molarity × volume) of H₂SO₄ = Given mass of H₂/Molar mass of H₂

Molarity of H₂SO₄ is given to be 6M and and given mass lf H₂ is 25 g. So, putting values,

6×volume = 25/2

Volume = 2.08 L.

So, the amount of required H₂SO₄ is 2.08 L.

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Complete Question - What is the minimum amount of 6.0 M H2SO4 necessary to produce 25.0 g of H2(g) according to the reaction between aluminum and sulfuric acid? 2 Al(s) + 3 H2SO4(aq)-Al2(SO4)3(aq) + 3 H2(g)

Answer:

a pure substance has different chemical and physical properties depending on its source