Question 1: The mixture that can be separated by filtration is:
a-iron and water.
b- salt and water.
c- vinegar and water.
Question 2: The solid remains on the filter paper is called:
a- filtrate.
b- distillate.
c- residue.
Question 3: The liquid that pass through the filter paper is called:
a-filtrate.
b-distillate.
c-residue.​

Answer:

Weight = Mass * Gravity = 50 kg * 10.5m/s² = 525 N

Explanation:

The step in Michaelis-Menten kinetics that determines the overall rate is the formation and breakdown of the enzyme substrate complex (ES complex).

This step is characterized by a rapid equilibrium between the ES complex and the free enzyme and substrate. The rate of formation of the ES complex is proportional to the concentration of both the enzyme and the substrate, whereas the rate of breakdown of the ES complex is proportional to the concentration of the ES complex. The overall rate is determined by the rate of formation of the ES complex, as this is the rate-limiting step in the reaction. Enzyme are biological catalysts that speed up chemical reactions in living organisms. They are proteins made up of chains of amino acids, and their unique three-dimensional shape allows them to bind to specific molecules, called substrates, and facilitate chemical reactions. Enzymes play crucial roles in metabolism, digestion, and other cellular processes, and their activity can be regulated by factors such as pH, temperature, and inhibitors. Deficiencies or abnormalities in enzyme function can lead to various diseases and disorders.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

In the titration of a 25.6 ml sample of a 0.397 m aqueous hydrofluoric acid solution with a 0.406 m aqueous potassium hydroxide solution, the pH at the equivalence point is 8.21.

Given volume of sample (V) = 25.6ml = 0.0256L

Concentration of  aqueous hydrofluoric acid solution (M1) = 0.397M

Concentration of  aqueous potassium hydroxide solution (M2) = 0.406M

The concentration of fluoride ions will determine the pH at the equivalency point. During the titration, the reaction is

HF + KOH --> H2O + KF.

Since it is the conjugate base of a weak acid, the F- will have an impact on the pH of the solution rather than the K+ in solution.

F- + H2O <--> HF + OH- is the reaction at the equivalence point, and the fluoride ion's molarity is 0.0256 x 0.397 = 0.010 moles of HF = moles of KOH at the equivalence point = 0.010/0.406 = 0.0246L of KOH

At the equivalence point, the F-'s molarity will be equal to =  0.010/(0.0256+0.0246) = 0.199M

Additionally, the Kb for F- is required, and its values are as follows:

Kw/Ka = 1.0 x 10-14 / (6.6 x 10-4) = 1.5 x 10-11

pOH = -log (1.8 x 10-6) = 5.79

pH = 14-5.79 = 8.21

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Answer:

They form ions.

Explanation:

Electrons are transferred from the metal atoms to the non-metal atoms.

HOPE THIS HELPED!! <3

Answer:2.00

Explanation:

The term used to denote the concentration of electrolytes in a given volume is "molarity".

Molarity-

Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.

A solution's molarity can be calculated using the following formula:

Molarity = moles of solute / liters of solution

Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.

Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.

Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.

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We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:

Compute Mg(OH)2's molar mass:

mol Mg = 24.31 g

O = 15.99 g/mol

H = 1.01 g/mol

Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.

Determine how many moles of Mg(OH)2 there are:

Mass / molar mass = number of moles

1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.

Determine the solution's molarity:

Molarity is equal to the moles of solute per litre of solution.

Molarity = 1.925 moles/1.2 litres = 1.60 M

As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.

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Similar to group 17, hydrogen is a diatomic element with a valence electron shell that only requires one atom to complete (pp153-154).

Scientists disagree that drinking hydrogen water has any hazards. However, they are unsure if its effects outweigh those of drinking regular water or being hydrated in general. Hyponatremia, which can be fatal, can result from excessive consumption of water.

Inside the earth's subsurface, there is just gaseous hydrogen. The majority of hydrogen is found in supernovae & gas giant planets. Hydrogen dominates the composition of the Sun. Its temperature is so intense in the inside of stars that hydrogens are changed into helium atoms.

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*sorry I can't give a full explanation.*

g = 9.8 m/s²

w = m*g

Weight of cat: 55 N = m*9.8

m = 5.61 kg

Weight of dog: 110 N = m*9.8

m = 11.22 kg

There is gravitational potential energy (GPE) acting on the cat since it's at the very top.

GPE of cat = m*g*h = 5.61*9.8*2 = 109.96 J

GPE of dog = m*g*h = 11.22*9.8*0 = 0 J (it's 0 m height because it's on the floor instead of in the tree)

But, if the dog was also 2 m up in the tree, its GPE would be 219.91 J.

As you can see, it's GRAVITATIONAL potential energy is bigger than the cat because it weighs more. Generally, if you were just trying to find the force which is w = m*g (since weight is a force), you would see that the bigger the mass, the bigger the force, and gravity stays the same.

Hope this helped

A chemical reaction might have occurred because of the smell produced. Option B.

The production of a sharp odor is a good indicator that a chemical reaction has occurred. A chemical reaction often involves the formation of new compounds with different properties from the original compounds. These new compounds may have different odor characteristics.

The lack of a change of state or color change does not necessarily rule out the possibility of a chemical reaction, as not all chemical reactions result in observable changes in these properties.

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Answer:C12: 0.487 m

Explanation:

The pH of a 0.00323 M AlCl3 solution is approximately 3.09.

To calculate the pH, we first need to find the concentration of H+ ions in the solution. AlCl3 is a strong electrolyte that dissociates completely in water to form Al3+ and Cl- ions. Since Al3+ is a weak acid, it undergoes hydrolysis with water to form Al(H2O)5OH2 and H+ ions. The concentration of Al3+ ions is the same as the initial concentration of AlCl3, which is 0.00323 M.

Using the equilibrium constant expression for the hydrolysis reaction of Al3+, we can determine the concentration of H+ ions.

By applying the formula for pH (-log[H+]), we find that the pH is approximately 3.09.

To determine the fraction of aluminum in the form Al(H2O)5OH2, we need to consider the hydrolysis equilibrium. The hydrolysis of Al3+ results in the formation of both Al(H2O)5OH2 and H+ ions. The fraction of aluminum in the desired form can be calculated by dividing the concentration of Al(H2O)5OH2 by the total concentration of Al3+ (0.00323 M in this case).

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The given electron configuration belongs to the element fluorine (F).

If an atom of fluorine approaches an atom with one valence electron (such as an alkali metal atom), a bond can form. Fluorine has seven valence electrons, and it requires one more electron to complete its octet (i.e., eight valence electrons) and achieve a stable electron configuration.

Therefore, fluorine will tend to gain one electron from the atom with one valence electron, forming a stable ionic compound. Alternatively, fluorine could share one electron with the atom with one valence electron, forming a covalent bond, but this is less likely due to the large difference in electronegativity between fluorine and alkali metals.

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Explanation:

evaporation is a process in which water starts boiling at 100 degree Celsius and from liquid state it changes to gaseous state. and it's a physical change of water

hope this helps you

have a great day :)

All the statements about the Lewis structures are correct. An ionic bond is formed by sharing of electrons and covalent bonds are formed by the transfer of electrons. A duet is stable EC of He and an octet has a valence electrons of 8.

An atom can establish bonds with other atoms in two main ways: covalent and ionic. The sharing of electrons between two or more atoms forms a covalent connection. When two or more ions join contact, they can create ionic bonds that are held together by charge differences.

Eight electrons make up the outermost shell of an octet. Two electrons make up the duplet's outermost shell. The final electron configuration of the octet is ns2 np6. The end of the duplet has an ns2 configuration.

So all the statements are correct about Lewis structure and none of them are false.

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Answer: bot sure

Explanation:

Answer: all I know it’s not -31.5 for ppl taking the k12 test

Explanation: I took the test

Answer:

its 69.9

Explanation:

yw

The products of the double replacement reaction given is

BaSO₄ (s) + MgCl₂ (aq) ; option D

A double replacement or double displacement reaction is a reaction in which an exchange of radicals occurs between two ionic compounds reacting resulting in the formation of a precipitate.

In a double replacement reaction, the two reacting compounds are aqueous solutions. When the solutions are mixed, one of the products formed is insoluble and is obtained as a precipitate.

Considering the double replacement reaction given:

BaCl₂ (aq) + MgSO₄ (aq) → BaSO₄ (s) + MgCl₂ (aq)

After an exchange of radicals, BaSO₄ (s) is obtained as a precipitate.

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Answer:

D) BaSO4 (s) + MgCl2

Explanation:

edge 2023

The minimum energy needed by the photons to react with silver bromide in the film is approximately 57.9 kJ/mol. Then, the wavelength is 206 nm.

Wavelength of a wave is the distance between two consecutive crests or troughs of the wave.

To find the wavelength of the energy in nm, we can use the equation:

E = hc/λ

where E is the energy in joules, h is Planck's constant (6.626 x 10⁻³⁴ J s), c is the speed of light (2.998 x 10⁸ m/s), and λ is the wavelength in meters.

First, we need to convert the energy from kJ/mol to J/photon:

57.9 kJ/mol = 57.9 x 1000 J/mol / 6.02 x 10²³ mol^-1

= 9.626 x 10²⁰ J/photon

Now we can use the equation above to find the wavelength:

9.626 x 10²⁰ J/photon = (6.626 x 10⁻³⁴ J s)(2.998 x 10⁸ m/s) / λ

Solving for λ, we get:

λ = hc/E = (6.626 x 10⁻³⁴ J s)(2.998 x 10^8 m/s) / 9.626 x 10⁻²⁰J/photon

  = 2.06 x 10⁻⁷ m

Finally, we convert the wavelength from meters to nanometers:

λ = 2.06 x 10⁻⁷ m x (10⁻⁹ nm/m)

  = 206 nm

Therefore, the wavelength of the energy needed to react with silver bromide in 35 mm photographic film is approximately 206 nm.

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In light of this, the elements influencing solubility depend on the solute's state water is considered as a pure substance because, with a few exceptions, it can dissolve essentially all soluble compounds. The mobility of a chemical can be influenced by a number of circumstances. The creation of a new bond between the molecules of the solute and the solvent is termed as solubility.

A substance's chemical and physical properties determine how soluble it is. A few other factors and situations can also impact it. A few of them are: temperature, pressure, type of binding, and forces here between components.

On the other hand, if this thermal decomposition turns out to be exothermic, solubility drops. If a solution must be used to breakdown hydrocarbons as little more than a solute.

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Answer: C. A child shivering in the cold

Explanation:

Did the test. :)

An electron configuration determines the kinds and numbers of bonds an atom will form with each other  atom . Carbon can form four covalent bonds with a variety of atoms due to its four valence electrons .

Other molecules can bond to carbon. An atom's features are largely determined by its electron configuration . Four covalent bonds can form with carbon. Chemical bonds known as covalent bonds can occur between nonmetals. Two atoms with covalent bonds have equal or identical electronegativity. Two atoms so share four pairs of electrons.

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Oxidizing acids, such as nitric acid, can explode when mixed with what type of incompatible chemicals like alcohol, or charcoal.

An oxidizing acid is a Brønsted acid that is a strong oxidizing agent. most Brønsted acids can act as oxidizing agents because the acidic proton can be reduced to hydrogen gas. a few acids include other structures that act as stronger oxidizing agents than hydrogen ions.

Oxidizing acids include concentrated perchloric acid, nitric acid, iodic acid, chromic acid, and the glass cleansing mixture of chromium trioxide and sulfuric acid.

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Answer: 2miles

Explanation:if he’s going 12 miles in one hour, in half an hour he would’ve made it 6 miles. 8-6=2

Answer: b. 2 miles

Explanation:

d) 22.1 moles of sulfur

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

707 g S (Sulfur)

Step 2: Identify Conversions

Molar Mass of S - 32.07 g/mol

Step 3: Convert

Step 4: Round

Our closest answer is d) 22.1 moles of sulfur

This is due to dividing different rounded values.

Answer:

\(\boxed {\boxed {\sf D. \ 22.1 \ moles \ of \ sulfur}}\)

Explanation:

To convert from moles to grams, we must use the molar mass. This can be found on the Periodic Table.

We are given a sample of sulfur. Look for the symbol S on the table.

This tells us the mass of 1 mole of sulfur. Use this molar mass as a ratio.

\(\frac{32.07 \ g \ S}{1 \ mol \ S }\)

Multiply by the given number of grams (707).

\(707 \ g \ S *\frac{32.07 \ g \ S}{1 \ mol \ S }\)

Flip the fraction so the grams of sulfur will cancel out.

\(707 \ g \ S *\frac{ 1 \ mol \ S }{32.07 \ g \ S}\)

\(707 *\frac{ 1 \ mol \ S }{32.07 }\)

\(\frac{ 707 \ mol \ S }{32.07 }\)

\(22.0455254 \ mol \ S\)

The number we caluclated is the closest to answer choice D: 22.1 moles of sulfur

Answer:

B. Cations are always the same size as the atoms from which they form.

Explanation:

That's i read in the book

"Anions are larger in size than the atoms from which they form" is a true statement. Therefore, option (C) is correct.

A cation contains more protons than electrons in it, which give it a net positive charge. A cation can be formed by losing one or more electrons must be lost by atoms.

The charge on the ion will be equal to the number of electrons lost as indicated after the chemical symbol. For example, silver (Ag) has lost one electron to become Ag⁺. The size of the cation is always smaller than the atom from which it formed.

An anion contains more electrons than protons which gives it a net negative charge. An anion can be formed by gaining one or more electrons or typically pulled away from other atoms.

The charge of the anion will be equal to the number of electrons gained, which is indicated after the chemical symbol.  For example, chlorine (Cl) accepts one electron to become Cl⁻.

The size of an anion is greater than the atoms from which it formed as the number of electrons in the ion increases and effective nuclear charge decreases.

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Answer:

Nuclear scientists continue to expand the periodic table as they detect new elements. ... Scientists create heavy elements by bombarding two lighter elements that together add up to the mass of the desired new element. One of the elements is stationary and thus called the target.