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Cloud [144]
3 years ago
7

A blank observation is when you describe something

Chemistry
1 answer:
lana [24]3 years ago
8 0
The correct answer would be... Scientific
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What is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l? what is th
Dafna1 [17]
We know that, M1V1     =     M2V2
                        (Initial)          (Final)
where, M1 and M2 are initial and final concentration of soution respectively. 
V1 and V2 = initial and final volume of solution respectively

Given: M1 = 12 m, V1 = 35 ml and V2 = 1.2 l = 1200 ml

∴ M2 = M1V1/V2 = (12 × 35)/ 1200 = 0.35 m
Final concentration of solution is 0.35 m
8 0
3 years ago
Hi!! please help :( lots of points !
andreev551 [17]

Answer:

<u><em>Structure:</em></u>

<em>Differences-  </em>A polymer is a collection of a large number of molecules whereas a monomer is a single molecule.

A monomer is a single molecule, which has the ability to chemically bond with other monomers in a long chain. A polymer is a chain that is made when monomers bind with other monomers.

<em>Similarities-</em>  They are both molecules

<u><em>Properties:</em></u>

<em> Differences- </em>Monomers have polyfunctionality, which is the capacity to form chemical bonds to at least two other monomer molecules. Polymers are chemically unreactive, solids at room temperature, malleable, tough, and are electrical insulators.

<em>Similarities- </em>They both makeup larger forms of matter.

<u><em>Intermolecular Forces</em></u>

<em>Differences: </em>Polymers are held together by covalent bonds, hydrogen bonds, and dispersion bonds. Monomers are <u><em>only</em></u> held together by hydrogen bonds.

<em>Similarities: </em>They can both be bonded together by hydrogen bonds.

3 0
1 year ago
One of the substance acted upon by a catalytic converter in an automobile is carbon dioxide. State true or false
elena-14-01-66 [18.8K]
This is false because catalytic converters in an automobile don't act upon carbon dioxide. They burn carbon monoxide and other carbon gasses to create carbon monoxide and water.
3 0
3 years ago
A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s
soldier1979 [14.2K]

Answer:

       \large\boxed{\large\boxed{0.291M}}

Explanation:

By definition one <em>half-life</em> is the time to reduce the initial concentration to half.

For a <em>second order reaction </em>the rate law equations are:

              \dfrac{d[B]}{dt}=-k[B]^2

             \dfrac{1}{[B]}=\dfrac{1}{[B]_0}+kt

The <em>half-life</em> equation is:

            t_{1/2}=\dfrac{1}{k[A]_0}

Thus, substitute the<em> rate constant</em>  1.30\times 10^{-3}M^{-1}\cdot s^{-1} and the <em>half-life </em>time <em>224s</em> to find [A]₀:

           224s=\dfrac{1}{1.30\times10^{-3}M^{-1}\cdot s^{-1}[A]_0}

           [A]_o=0.291M

7 0
3 years ago
Relacione el punto de ebullición del agua y la acetona (propanona), con la facilidad de a evaporación de estas sustancias (volat
Elden [556K]

Answer:

Here's what I get  

Explanation:

1. Water

The O-H bond in water is highly polar.

It has about one-third ionic character.

The partially-positive H atoms and partially negative O atoms strongly attract each other  by hydrogen bonds.

It takes a large amount of energy to separate the water molecules from each other.

Thus, the boiling point of water is relatively high (100 °C).

2. Acetone

The C=O bond in acetone is much less polar.

It is less than 20 % ionic.

The dipole-dipole attractions in acetone are much weaker than the hydrogen bonds in water.

It takes much less energy to separate the acetone molecules from each other.

Thus, even though the molar mass of acetone is more than three times that of water, the boiling point of acetone is only 56 °C.

4 0
3 years ago
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