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valkas [14]
3 years ago
7

Which prediction about a methane molecule would most likely be made by using both the quantum model of the atom and John Dalton'

s model?
Chemistry
1 answer:
jeyben [28]3 years ago
4 0

Answer. Methane molecule is made up of five atoms; four of hydrogen and one of carbon. Carbon atom is sharing its 4 valence electrons with 4 hydrogen atoms each having 1 electron.

Explanation:

Dalton model of atom said that the matter is made up of smallest indivisible particle that is an atom. From which he predicted that methane molecule will be made up one carbon atom and 4 hydrogen atoms.

Quantum model of atom described the structure of atom with the help of four quantum numbers. These number explained the position, magnetic character and spin of electrons  inside the atom. and further explained the sharing of electron between one one carbon and 4 hydrogen atoms.

Hence from these two models we can predict that methane molecule is made up atoms with sharing of electrons.


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Define the kinetic molecular theory
Andru [333]

The definition of the word Kinetic molecular theory is the collection of several rules that describe the behavior of gases.

4 0
2 years ago
Perspex and polythene are two examples of what?​
erma4kov [3.2K]
Perspex and polythene are good examples of insulators.
3 0
2 years ago
A sample of 5.30 mLmL of diethylether (C2H5OC2H5;density=0.7134g/mL)(C2H5OC2H5;density=0.7134g/mL) is introduced into a 6.50 L L
lilavasa [31]

Answer:

1.16atm

Explanation:

We are going to derive the mass of ether from density

mass=density *volume

Also moles=mass/molecular mass

molar mass C2H5OC2H5 =74.12 g/mole

the density of ether is 0.7134 g/ml

mass C2H5OC2H5 = 5.30 ml x 0.7134 g/ml = 3.78 g

moles C2H5OC2H5 =3.78 g x 1 mole/74.12 g = 0.0509 moles

PV = nRT where P=?; n=0.0509 moles; V=6.50L; R=0.0821 Latm/Kmol; T=35ºC +273 = 308K

P = nRT/V = 0.0509)(0.0821)(308)/6.50

P = 0.198 atm (to 3 significant figures (this is the partial pressure of diethyl ether).  

TOTAL PRESSURE

P1+p2+p3

= 0.198 atm + 0.750 atm + 0.207 atm =1.1550atm

1.16atm(3 significant figures)

5 0
3 years ago
A. Use the following steps to balance the redox reaction below. Al(s) Ni2 (aq) Ni(s) Al3 (aq)
Alja [10]

Answer:

2Al(s) +3Ni²⁺(aq) ⟶ 2Al³⁺(aq) + 3Ni(s)  

Explanation:

The unbalanced equation is

Al(s) + Ni²⁺(aq) ⟶ Ni(s) + Al³⁺(aq)

(i) Half-reactions

Al(s) ⟶ Al³⁺(aq) + 3e⁻

Ni²⁺(aq) + 2e⁻ ⟶ Ni(s)

(ii) Balance charges

2 × [Al(s) ⟶ Al³⁺(aq) + 3e⁻]

3 × [Ni²⁺(aq) + 2e⁻ ⟶ Ni(s)]

gives

2Al(s) ⟶ 2Al³⁺(aq) + 6e⁻

3Ni²⁺(aq) + 6e⁻ ⟶ 3Ni(s)

(iii) Add equations

2Al(s) ⟶ 2Al³⁺(aq) + 6e⁻

<u>3Ni²⁺(aq) + 6e⁻ ⟶ 3Ni(s)                                       </u>  

2Al(s) +3Ni²⁺(aq) + <em>6e</em>⁻ ⟶ 2Al³⁺(aq) + 3Ni(s) + <em>6e⁻ </em>

Simplify (cancel electrons)

2Al(s) +3Ni²⁺(aq) ⟶ 2Al³⁺(aq) + 3Ni(s)

8 0
2 years ago
A mixture of gaseous CO and H2, called synthesis gas, is used commercially to prepare methanol (CH3OH), a compound considered an
Anit [1.1K]

<u>Answer:</u> The value of K_c for the reaction at 550.3 K is 247.83

<u>Explanation:</u>

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_{c}

For a general chemical reaction:

aA+bB\rightarrow cC+dD

The expression for K_{c} is written as:

K_{c}=\frac{[C]^c[D]^d}{[A]^a[B]^b}

The chemical equation for the production of methanol follows:

CO+2H_2\rightleftharpoons CH_3OH

The expression of K_c for above equation follows:

K_c=\frac{[CH_3OH]}{[CO][H_2]^2}

We are given:

[CH_3OH]=0.0401mol/L

[CO]=0.02722mol/L

[H_2]=0.07710mol/L

Putting values in above equation, we get:

K_c=\frac{0.0401}{0.02722\times (0.07710)^2}\\\\K_c=247.83

Hence, the value of K_c for the reaction at 550.3 K is 247.83

3 0
3 years ago
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