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3 years ago

Can you please help me !!

Chemistry

1 answer:

ioda3 years ago

7 0

Answer:

Explanation:

A) O2 (non polar covalent)

B) HF (polar covalent)

C) NaCl (because its ionic)

im not 100% sure hope it helps

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For the reaction C6H14(g) ------> C6H6(g) + 4H2(g), the rate of formation of hydrogen gas, H2 was found to be 2.5 x 10-2 atm/

riadik2000 [5.3K]

Answer : The rate of consumption of hexane is, $6.25\times 10^{-3}atm/s$

Explanation :

The general rate of reaction is,

$aA+bB\rightarrow cC+dD$

Rate of reaction : It is defined as the change in the concentration of any one of the reactants or products per unit time.

The expression for rate of reaction will be :

$\text{Rate of disappearance of A}=-\frac{1}{a}\frac{d[A]}{dt}$

$\text{Rate of disappearance of B}=-\frac{1}{b}\frac{d[B]}{dt}$

$\text{Rate of formation of C}=+\frac{1}{c}\frac{d[C]}{dt}$

$\text{Rate of formation of D}=+\frac{1}{d}\frac{d[D]}{dt}$

$Rate=-\frac{1}{a}\frac{d[A]}{dt}=-\frac{1}{b}\frac{d[B]}{dt}=+\frac{1}{c}\frac{d[C]}{dt}=+\frac{1}{d}\frac{d[D]}{dt}$

From this we conclude that,

In the rate of reaction, A and B are the reactants and C and D are the products.

a, b, c and d are the stoichiometric coefficient of A, B, C and D respectively.

The negative sign along with the reactant terms is used simply to show that the concentration of the reactant is decreasing and positive sign along with the product terms is used simply to show that the concentration of the product is increasing.

The given rate of reaction is,

$C_6H_{14}(g)\rightarrow C_6H_6(g)+4H_2(g)$

The expression for rate of reaction :

$\text{Rate of disappearance of }C_6H_{14}=-\frac{d[C_6H_{14}]}{dt}$

$\text{Rate of formation of }C_6H_6=+\frac{d[C_6H_6]}{dt}$

$\text{Rate of formation of }H_2=+\frac{1}{4}\frac{d[H_2]}{dt}$

As we know that, the partial pressure is directly proportional to the concentration. So,

$\text{Rate of reaction}=-\frac{dP_{C_6H_{14}}}{dt}=+\frac{dP_{C_6H_6}}{dt}=+\frac{1}{4}\frac{dP_{H_2}}{dt}$

Given:

$+\frac{dP_{H_2}}{dt}=2.5\times 10^{-2}atm/s$

As,

$-\frac{dP_{C_6H_{14}}}{dt}=+\frac{1}{4}\frac{dP_{H_2}}{dt}=2.5\times 10^{-2}atm/s$

and,

$\frac{dP_{C_6H_{14}}}{dt}=\frac{1}{4}\times 2.5\times 10^{-2}atm/s$

$\frac{dP_{C_6H_{14}}}{dt}=6.25\times 10^{-3}atm/s$

Thus, the rate of consumption of hexane is, $6.25\times 10^{-3}atm/s$

4 0

4 years ago

Periodic table the first row of elements fits in the period blank after the element blank the second row of elements fits in per

Bezzdna [24]

Answer:

The first row fits in period 2

The second row fits in period 3

Explanation:

Elements arranged vertically in the periodic table in groups that share similar chemical properties.

Elements are also organized horizontally in rows or periods

The length of each period is determined by the number of electrons that can occupy the sublevels being filled in that period.

7 0

3 years ago

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients NH3(g) + O2(g) + CH4(g)

alexira [117]

Answer:

$2NH_{3 (g)} + 3O_{2 (g)} +2CH_{4 (g)} --> 2HCN_{(aq)} + 6H_{2}O_{(l)}$

Explanation:

5 0

3 years ago

What kind of bond occurs between two<br> elements sharing three pairs of electrons?

Zigmanuir [339]

Covalent bond i believe

6 0

3 years ago

Why did bohrs observations of gaseous elements not reveal a complete spectrum when the light was shone through a prism? explain

Vika [28.1K]

The Bohr model proposed that electrons could just have characterized vitality levels thus when rotting back to a lower vitality level discharge a specific measure of vitality. Since the measure of vitality could be changed over to a specific recurrence then particular emanation lines were found in the electromagnetic range. Alternate speculations couldn't clarify the discharge lines.

4 0

3 years ago