A buffer solution is prepared by adding 275 mL of .676 M of HCl to 500 mL of .525M sodium acetate. What is the pH of this buffer?

These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

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Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

Ernie's behavior is unsafe because,

Lydia's behavior is appropriate because

This behavior is important because

In that picture, we see Lydia well clad in her laboratory suit, and gloves. She also maintains a serious work ethic as she views the solution in the flat bottom flask.

This is the recommended attitude in the laboratory because it allows for safety and accuracy.

Ernie, on the other hand, runs around the laboratory while playing with the microscope. He could slip and have a chemical fall on him thus causing an injury.

His behavior causes distractions and might also cause mistakes for scientists observing and recording data.

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Due to the latent heat of fusion, when a modest amount of heat is added, ice will transform into water without changing the temperature. Therefore, a portion of the ice may melt (but not all of it). The right answer is A.

The sun and stars are both powered by fusion. Fusion is the process by which two hydrogen atoms join, or fuse, to create a helium atom. Throughout the process, a portion of both the hydrogen's energy is converted into energy.

When multiple light nuclei combine by fusion, a heavy nucleus is produced. The process results in the production of energy because as the size of the single nucleus that forms is less than the sum of the masses of the two original nuclei. Every leftover mass is transformed into energy.

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Answer:

Mg donates two electrons to O

Explanation:

Lewis dot notation uses dots and crosses to represent valence electrons on atoms.

Magnesium is a metal and would donate or lose electrons during bonding.

Oxygen is a non metal and would gain electrons during bonding.

The correct option is;

Mg donates two electrons to O

Answer:

arms

Explanation:

because arms can be metric system of our body

Answer:

nose and the tip of an outstretched middle finger.

The functional group shown in the given figure in the question is ether. The correct option to this question is A.

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Answer:

MgCl2 +2K= 2KCl+ Mg

Explanation:

I think MgCl2 you meant

Answer:

Explanation:

These are daily things u use

Answer

-1430 kJ

Explanation

Given information:

From 1; ΔH for the formation of 1 mol CO₂(g) = -394 kJ. For 2 mol CO₂(g), ΔH will be (2 x -394 kJ) = -788 kJ

From 2; ΔH for 1 mol H₂O(l) = -242 kJ. For 3 mol H₂O(l), ΔH will be (3 x -242 kJ) = -726 kJ

From 3, ΔH for 1 mol C₂H₆ = -84 kJ.

ΔHc for the given reaction can be calculated using the formula below:

For the reactants,

Therefore, ΔHc for the given reaction is:

ΔHc = -1514 kJ - (-84 kJ)

ΔHc = -1514kJ + 84 kJ

ΔHc = -1430 kJ

Answer: you have to talk to someone who wont mind wanting to wanting to like you a lot like that.

Explanation:  I wish I could be able to talk to someone who would want to get to like me like that, so its a very relatable situation.

Answer:

C.) That all matter was composed of earth, fire, water and air

Explanation:

Just took the test

Shear thickening fluid Fluid B, shear thinning fluid Fluid A, and Newtonian fluid Fluid C.

Because there are more inter - particle gaps, fluids flow more fluidly and don't have a set structure. Fluids include both liquids and gases. Any fluid's molecules are always moving randomly and interacting with one another as well as any module's walls.

Idea fluids, Real flow, Kinematic fluid, Non-Newtonian coolant, Viscoelastic secretions, and Number of initiatives Fluid are the various types of fluid. The thermodynamic characteristics of fluids are their temperatures, viscosity, pressure, as well as specific enthalpy. Physical characteristics: These characteristics, including as color and odor, aid in recognizing the fluid's physical state.

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Complete question is:

You are given experimental data below measured by a Cole Parmer rotary viscometer. Although the fluid is unknown, you can classify the fluids as Newtonian, shear thickening, and/or shear thinning. Please classify each fluid. (LAB 1)

Fluid A = exponential decay

Fluid B = exponential growth

Fluid C = Linear horizontal line

Answer:

73,326 Pa

Explanation:

73,326 Pa

Answer:

3.7mL is the volume of the object

Explanation:

To convert the mass of any object to volume we must use density that is defined as the ratio between mass of the object and the space that is occupying. For an object that weighs 7.9g and the density is 2.28g/mL, the volume is:

7.9g * (1mL / 2.28mL) =

The maximum mass of ammonia that can be produced from a mixture of 330.0 g of N2 and 420.0 g of H2 is 400.7g. Hydrogen is left unreacted. The mass of the Hydrogen would remain unreacted is 349.3g.

A chemical reaction's limiting reagent is the one that will totally consume all of the reactants. The reaction cannot continue if that reactant is no longer present. It prevents the reaction from intensifying as a result.

The reactant with surplus reagent is the one that would have continued to react if the other had not been used up.

The limiting reactant is the one that is consumed first and establishes a maximum limit on the quantity of product(s) that can be produced.

Calculate the amount of each reactant present and compare it to the amount of each reactant in the balanced chemical equation to determine the limiting reactant.

1) Moles of N2=330/28=11.79

moles of H2=420/2=210

moles of NH3 formed=2*11.79=23.57moles = 400.7g

2) Hydrogen is left unreacted.

3) hydrogen left=210-11.79*3=174.64moles = 349.3g

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The concentration of the methylamine chloride is 0.0000013 M.

We know that the concentration has to do with the amount of the substance that is present. Hence, the question is essentially trying to ask us to be able to find the  the concentration of methylamine chloride in the solution.

[H^+] = Antilog(-0.20) = 0.63 M

Ka = 1 * 10^-14/4.6*10^-4 = 2.22 * 10^-11

Let us first set up the ICE table as shown below;

            CH3NH2(aq)    +  H^+  ⇄  CH3NH3^+(aq)   + OH^-(aq)

I               0.15                   0.63         0                         0                      

C              -x                      -x              +x                        +x

E         0.15 - x                0.63 -x        x                          x

Ka = [CH3NH3^+] [OH^-]/[CH3NH2] [H^+]

2.22 * 10^-11= x^2/[0.15 - x] [0.63 -x ]

2.22 * 10^-11(0.09 -0.15x - 0.63x + x^2) = x^2

2.22 * 10^-11(0.09 - 0.48x +x^2) = x^2

1.9 * 10^-12 - 1.1 * 10^-11x + 2.22 * 10^-11x^2 = x^2

x^2 - 2.22 * 10^-11x^2 +  1.1 * 10^-11x  - 1.9 * 10^-12  = 0

x^2 +  1.1 * 10^-11x  - 1.9 * 10^-12  = 0

x =0.0000013 M

Concentration of the methylamine chloride = 0.0000013 M

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Answer:

D. Matter

Explanation:

The definition of matter is any substance that has mass and takes up space by having volume

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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The specie that is being reduced according to the equation is Cl2.

Now let us look at the reaction equation again;

Mg + Cl2 ----->  Mg2+ + 2Cl–

Reduction occurs when there is a decrease in oxidation number and oxidation occurs when there is an increase in oxidation number.

From left to right, the oxidation number of magnesium increased from zero to +2 while the oxidation number of chlorine decreased from zero to -1.

Hence Magnesium was oxidized while chlorine was reduced.

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Answer:

b

Explanation:

Answer:

i dont know what you are saying

Explanation:

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Answer:

d

Explanation:

d

The formulas which could represent the empirical formula and the molecular formula of a given compound are  CH₂, C₃H₆ as the smallest possible is 2 which on multiplying the subscripts of empirical formula give molecular formula.

Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.

Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.

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If 9.8 g of sulfuric acid is dissolved in excess quantity moles of hydrogen ion is 0.1, 0.2. The correct option is A.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

Molar mass H₂SO₄ = 98 g/mol

9.8 g H₂SO₄ = 0.1 mol

H₂SO₄ produces 2 H+ ions

Therefore, [H+] = 0.2 M

Number of H+ ions = 0.2 x 6.022 x 10²³ = 1.20 x 10²³ H+ ions

H₂SO₄ dissociates in 2 steps

The first dissociation is complete because H₂SO₄ acts as a strong acid here

H₂SO₄ → H+ + HSO₄-

Thus, the 0.1 mol H₂SO₄ will produce 0.1 mol H+ and the moles of sulfate ion is 0.2. The correct option is A.

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Material from meteorites are not the elements used to make models of interstellar medium. The correct option is A.

The matter and radiation that prevail in the space between star systems in a galaxy are referred to as the interstellar medium in astronomy. This matter consists of gas including ionic, atomic, and molecular, dust, and cosmic rays.

Meteorite material is not used to create models of the interstellar medium.

Thus, the correct option is A.

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The statements which is true is the atomic mass will be between 35 and 37.

Isotopes can be defined as the tittles of identical rudiments that are composed of the same number of electrons and protons but differ in case of the number of neutrons. Since the number of neutrons is different in colorful isotopes of an element so, their infinitesimal millions also vary. still, the infinitesimal number remains the same as no change occurs in protons number.

Chlorine is an element in the periodic table with infinitesimal number 17 and is represented with the symbol Cl. The element nickel has colorful isotopes. One of the isotopes of chlorine is chlorine- 35 and another bone is chlorine-37 which is present in a rate of 75.8% and24.3%.

The average atomic mass of chlorine;

Average atomic mass

=(Fractional abundance of 35Cl) × (Molar Mass of 35Cl) +(Fractional abundance of 37Cl) × (Molar Mass of 37Cl)

=75.8100 × 35u + 24.3100 × 37u

=26.53u + 8.991u

=35.521 u

The average atomic mass of chlorine is 35.521 u.

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pls mark as brainlist

Explanation:

Crude is classified, based on density, as light, medium, heavy, or extra heavy. It can also be classified, based on sulfur content, into a sour and sweet category.

Answer:

P6S9

Explanation:

Firstly, let's write the numbers in Latin

1 = mono

2 = di

3 = tri

4 = tetra

5 = penta

6 = hexa

7 = hepta

8 = octa

9 = nona

Secondly, write the symboles of the given elements:

Phosphorus is P

Sulfide is S

Finally, connect the numbers and symbols.

Rule of pronunciation: Number of first element + symbol of first element + number of second element + symbol of second element

P6S9

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An ion is formed electrons are gained or lost.

What is electron ?

An electron might be attached to an atom or be free. The subatomic particle known as an electron is negatively charged (not bound). In an atom, protons, neutrons, and an electron that is bound to an atom make up the three primary particle kinds. A proton, a neutron, and an electron make up an atom's nucleus.

What is ion ?

Ions are electrically charged particles that can be produced by either removing electrons from neutral atoms to produce positive ions or adding electrons to neutral atoms to produce negative ions.

Therefore, An ion is formed electrons are gained or lost.

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Given :

Number of heart beat in 1  minute , n = 70 .

The individual lives for 85 years .

To Find :

The number of heartbeats in their lifespan .

Solution :

Now , number of minutes in one hour is 60 .

One day contains 24 hours .

Therefore , minutes in one whole day :

\(24\times 60 = 1440\ sec\)

Now , 1 year contains 365 days .

( Note : We are not considering any leap years )

Minutes in one year are :

\(365\times 1440=525600=5.25\times 10^5\ sec\)

So ,total minutes in 85 years is :

\(=5.25\times 10^5\times 85\\\\=4.46\times 10^7\ sec\)

Hence , this is the required solution .