One of your classmates tells you, “Since atoms are the basic building blocks of matter, all atoms have to be the same. Do you agree or disagree with this statement? Explain your reasoning.

The concentration of the KOH solution = 0.2064 M

Titration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range  

Acid-base titration formula  

Ma Va. na = Mb. Vb. nb  

Ma, Mb = acid base concentration  

Va, Vb = acid base volume  

na, nb = acid base valence  (number of ions H+/OH-)

a=H₂SO4(valence = 2, H₂SO4⇒2H⁺+SO₄²⁻, 2 ions H⁺)

b=KOH(valence = 1, KOH⇒K⁺+OH⁻, 1 ion OH⁻)

Ma = 0.15 M

Va = 17.2 cm³

Vb=25 cm³

The concentration of the KOH(Mb) :

[tex]\tt 0.15\times 17.2\times 2=Mb\times 25\times 1\\\\Mb=0.2064[/tex]

The mass of olive oil : 690 g

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density  

m = mass  

v = volume  

Given

volume of olive oil = V=750 ml

density of olive oil = ρ = 0.92 g/ml

Required

the mass of olive oil

Analysis

the formula :

[tex]\tt m=\rho\times V[/tex]

Solution

[tex]\tt m=0.92\times 750\\\\m=690~g[/tex]

Paraphrase

the mass of olive oil : 690 g

Answer:

The H+ concentration would decrease by 10 fold. From .01 to .001

Explanation:

This is due to how a pH of 2 is expressed in scientific notation as 10^-2 power when referring to H+ concentration so a pH of 3 would be 10^-3. Hence it would be 10 times smaller in concentration as the power increases to the negative power the smaller the concentration becomes.

Moles of chromium (lll) oxide produced : 4 moles

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

4Cr+3O₂⇒2Cr₂O₃

moles of Cr=8 moles

From the equation, mol ratio Cr : Cr₂O₃ = 4 : 2, so mol Cr₂O₃ :

[tex]\tt \dfrac{2}{4}\times 8=4~moles[/tex]

ANSWER:

oil lol

EXPLANATION:

Answer:

Mineral oil, fragrance, aloe barbadensis leaf extract, tocopheryl acetate (vitamin E), water.

Explanation:

Answer:

Protons and neutrons

Explanation:

In the nucleus of an atom only the protons and neutrons are present. The extra-nuclear space is filled with electrons which are negatively charged.

Only two of the subatomic particles are found in the nucleus of an atom. The particles are protons and neutrons.

Answer:

Protons and Neutrons

Explanation:

At normal temperature and pressure, hydrogen chloride (HCl), a gas composed of the element's hydrogen and chlorine, is a gas.

An aqueous solution of hydrogen chloride is what is known as hydrochloric acid, commonly referred to as muriatic acid. It has an unmistakably strong odor and is colorless. It is categorized as a powerful acid. In the digestive tracts of the majority of animal species, including humans, it is a part of the stomach acid. In the food, textile, metal, and rubber sectors, hydrogen chloride (HCl) is frequently employed as a bleaching agent to neutralize alkaline substances. When discharged into the soil, it is neutralized, and when it comes into contact with water, it hydrolyzes quickly.

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Answer:

Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).

Explanation:

I hope this helps! :D Have a nice night!

Answer:

sodium nitrate, because it is the solute

Explanation:

To find the molarity of the solution, Josh should determine the number of moles of the sodium nitrate.

 Molarity is defined as the number of moles of solutes in a given volume of solution.

  Molarity  = [tex]\frac{n}{v}[/tex]  

n is the number of moles of solute

v is the volume of solution

Answer:

C: sodium nitrate, because it is the solute

Explanation:

Answer:

Protons are the atomic number and for each element they never change.

Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)

Mass number is Protons+Nuetrons

Explanation:

Answer:

Actually it is father who actually determine the sex of child

Explanation:

Because father has X & Y chromosome but mother has only XX chromosome. So it depends on which chromosome of father. If father's gamete has only x chromosome then the child will be female. And if the father's gamete has Y chromosome then the child will be male.

please mark me brainliest and 5 star

Answer:

61.39%

Explanation:

The percent yield of a substance can be calculated using the formula:

Percent yield = actual yield/theoretical yield × 100%

Based on the information provided on the reaction in this question, the theoretical yield is given as 99.2g while the actual yield is given as 60.9g.

Hence, the percent yield is calculated thus:

% yield = 60.9/99.2 × 100

% yield = 0.6139 × 100

% yield = 61.39%

The percent yield is 61.39%

Answer:

Copper siliconquadoxide

Explanation:

Answer:

bacteria release acids and other agents that break down rock

Explanation:

One of the ways in which biological weathering results in chemical erosions is through bacteria releasing acids and other agents to break down a rock.

Weathering is defined as the physical disintegration and chemical decomposition of rocks to form sediments and soils.

The process of erosion removes the weathered materials from the earth surface.

Chemical weathering involves the decay of rocks by chemical means.

Answer:

1.7M

Explanation:

Given parameters:

Volume of solution = 0.3L

Number of moles  = 0.5moles

Unknown:

Molarity  = ?

Solution:

The molarity of a substance is the number of moles of solute that can be found in the volume of a solution.

  Molarity  = [tex]\frac{number of moles }{volume}[/tex]  

      Insert the parameters and solve;

 Molarity  = [tex]\frac{0.5}{0.3}[/tex]  = 1.7M

Answer:

1.5 × 10²⁴ atoms Mn

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

2.5 mol Mn

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]2.5 \ mol \ Mn(\frac{6.022 \cdot 10^{23} \ atoms \ Mn}{1 \ mol \ Mn} )[/tex] = 1.5055 × 10²⁴ atoms Mn

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

1.5055 × 10²⁴ atoms Mn ≈ 1.5 × 10²⁴ atoms Mn

Answer:

Say Sofa and king ten times in a row fast

Explanation:

The relative atomic mass of an element is the mass of its atoms with Carbon element.

The atomic mass of an element is defined as the average mass of the element.

Atomic mass is also defined as the mass of nucleus or it is the sum of atomic number and number of neutrons present in the atom of an element.

Relative atomic mass is defined as the atomic mass compared to One-twelvth the mass of the one atom of carbon. Since, it is seen that it is comparison of atomic mass with 1/12 the mass of an atom of carbon therefore it is indicated as relative atomic mass.

Thus, we concluded that the relative atomic mass of an element is the 1/12 the mass of its atoms with Carbon element.

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Answer:

b

Explanation:

and if that wrong let me know cause jm my science class its b

Answer:

Cell expansion and an increase in turgor pressure is due to inward diffusion of water into the cell, and turgor pressure increases due to the increasing volume of vacuolar sap. A growing root cell's turgor pressure can be up to 0.6 MPa, which is over three times that of a car tire.

Explanation...read that and you will have a sucess

Answer: No

Explanation:

The components of a compound do not retain their individual properties.

Answer:

Explanation:

The increase of the arable land has been affected partly by the reclamation of the marshes, but mostly by the transformation of large tracts of the puszta

An example of a reclamation is how landfill employees sift through garbage to find usable items. An example of a reclamation is trees growing on land that was heavily logged.

Answer:

1.51 x 10²⁴molecules

Explanation:

Given parameters:

Number of moles of NaCl  = 2.5moles

Unknown:

Number of molecules  = ?

Solution:

The number of molecules that can be found in a given mole is given as the Avogadro's constant;

       1 mole of substance  = 6.02 x 10²³ molecules

       2.5 mole of NaCl  = 2.5 x 6.02 x 10²³ molecules

                                       = 1.51 x 10²⁴molecules

Answer:

choose a. 30 parts alcohol