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3 years ago

The idea that atoms are indivisible explains all of the following except which of the following

Chemistry

1 answer:

Crazy boy [7]3 years ago

5 0

Answer:

ll matter is composed of extremely small particles called atoms.

Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size, mass, and other properties.

Atoms cannot be subdivided, created, or destroyed.

Atoms of different elements can combine in simple whole number ratios to form chemical compounds.

In chemical reactions, atoms are combined, separated, or rearranged.

Each atom is uniform, homogeneous, colorless, tasteless, and indivisible.ll atoms of a given element are identical in mass and properties. Compounds are formed by a combination of two or more different kinds of atoms. A chemical reaction is a rearrangement of atom.

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The Arrhenius equation shows the relationship between the rate constant k and the temperature T in kelvins and is typically writ

Alex17521 [72]

Answer:

T = 42.08 °C

Explanation:

Using the expression,

$\ln \dfrac{k_{1}}{k_{2}} =-\dfrac{E_{a}}{R} \left (\dfrac{1}{T_1}-\dfrac{1}{T_2} \right )$

Wherem

$k_1\ is\ the\ rate\ constant\ at\ T_1$

$k_2\ is\ the\ rate\ constant\ at\ T_2$

$E_a$ is the activation energy

R is Gas constant having value = 8.314 J / K mol

Thus, given that, $E_a$ = 45.6 kJ/mol = 45600 J/mol (As 1 kJ = 1000 J)

$k_2=2\times k_1$

$k_1=0.0160s^{-1}$

$T_1=30\ ^0C$

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (30 + 273.15) K = 303.15 K

$T_1=303.15\ K$

So,

$\ln \dfrac{k_{1}}{2\times k_{1}} =-\dfrac{45600}{8.314} \left (\dfrac{1}{303.15}-\dfrac{1}{T_2} \right )$

$\ln \dfrac{1}{2} =-\dfrac{45600}{8.314} \left (\dfrac{1}{303.15}-\dfrac{1}{T_2} \right )$

$8.314\ln \left(2\right)=-45600\left(\frac{1}{303.15}-\frac{1}{T_2}\right)$

$8.314\ln \left(2\right)=-150.42058+\frac{45600}{T_2}$

$144.65775 =\frac{45600}{T_2}$

$T_2=\frac{45600}{144.65775}$

$T_2=315.23\ K$

Conversion to °C as:

T(K) = T( °C) + 273.15

So,

315.23 = T( °C) + 273.15

3 0

3 years ago

A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example

11Alexandr11 [23.1K]

Answer:

Homologous structure

Explanation:

Homologous structures come from same ancestors but have different functions.

4 0

3 years ago

Read 2 more answers

A sodium ion, Na+, with a charge of 1.6×10−19C and a chloride ion, Cl− , with charge of −1.6×10−19C, are separated by a distance

sasho [114]

Answer:

$W\geq 2.1x10^{-19}J$

Explanation:

Due to Coulomb´s law electric force can be described by the formula $F=K\frac{q_{1}.q_{2}}{r^{2}}$ , where K is the Coulomb´s constant ( $9x10^{9} N\frac{m^{2} }{C^{2} }$ ), $q_{1}$ = Charge 1 (Na+ in this case), $q_{2}$ is the charge 2 (Cl-) and r is the distance between both charges.

Work made by a force is W=F.d and total work produced is the change in energy between final and initial state. this is $W=W_{f} -W_{i}$ .

so we have $W=W_{f} -W_{i} =(K\frac{q_{(Na+)}q_{(Cl-)}rf}{r_{f} ^{2}})-(K\frac{q_{(Na+)}q_{(Cl-)}ri}{r_{i} ^{2}})=Kq_{(Na+)}q_{(Cl-)[\frac{1}{{r_{f}}} -\frac{1}{{r_{i}}}]$

Given that ri= 1.1nm= $1.1x10^{-9}m$ and rf= infinite distance

$W=(9x10^{9})(1.6x10^{-19})(-1.6x10^{-19})[\frac{1}{\alpha }-\frac{1}{(1.1x10^{-9})}]=2.1x10^{-19}J$

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3 years ago

HELP !!!!!! An object moving forward at 10 m/s suddenly begins moving backward at 5 m/s. What is the most accurate explanation f

Nana76 [90]

It moves backwards 5m/s slower that forward

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3 years ago

Three reasons for air is mixture and water is compound

zhannawk [14.2K]

1. air components change from place to place, while water will just stay the same

2. Water doesn't have nor show individual properties, but air does show that it has it's own property

3. You can separate different gases from air physically, but with water you must pass electricity through it.

Don't take my word for it, this is just what I learned back in middle school.

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3 years ago

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The idea that atoms are indivisible explains all of the following except which of the following​

The idea that atoms are indivisible explains all of the following except which of the following