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3 years ago

Most atoms form compounds by forming octets in their outer shell. what does octet really mean?

1 answer:

7 0

The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.

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Answer:

Explanation:

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3 years ago

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If the reactants contain one chlorine molecule, do you know how many chlorine atoms will be in the product? Include conversion o

max2010maxim [7]

Answer:

The number of Chlorine atoms in the product is 2.

Explanation:

The law of conservation of mass states that matter can neither be created nor destroyed in a chemical reaction.

The reactants contain one chlorine molecule( $Cl_{2}$ ) which has two chlorine atoms.

Then, according to law of conservation of matter, the product must contain two chlorine atoms.

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3 years ago

Draw the structure of 5 bromo 1,1,1-trichloro-5 ethyl 2,3 di methyl heptane

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5 bromo 1.1.1 -trichloro -5 ethyl 2.3 dimethyl heptane

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3 years ago

A 0.0884 M solution of a weak base has a pH of 11.79. What is the identity of the weak base?Weak Base KbEthylamine (CH3CH2NH2) 4

iVinArrow [24]

Answer:

The base must be ethylamine.

Explanation:

The pH of solution of a weak base gives us an idea about the Kb of the base.

$pOH=14-pH$

$pOH=14-11.79=2.21$

$pOH=-log[OH^{-}]$

$[OH^{-}]=0.0062M$

The relation between Kb and hydroxide ion concentration is:

$Kb=\frac{[OH^{-}]^{2}}{[base]}$

$Kb=\frac{0.0062X0.0062}{0.0884}=4.34X10^{-4}$

Thus the weak base must be ethylamine.

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3 years ago

Consider the following system at equilibrium where H° = 16.1 kJ, and Kc = 6.50×10-3, at 298 K. 2NOBr(g) 2NO(g) + Br2(g)If the VO

Norma-Jean [14]

Answer:

1) The value of Kc : (C.) remains the same

2) The value of Qc : (A.) is greater than Kc

3) The reaction must : (B.) run in the reverse direction to reestablish equilibrium.

4) The number of moles of Br2 will : (B.) decrease

Explanation:

Value of concentration equilibrium constant Kc depends only on temperature. Since temperature remains constant, therefore, Kc remains constant. Decrease in volume means increase in pressure. Increase in pressure favors the side with less gaseous species. Hence, increase in pressure will favor the reverse reaction towards reactants.

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3 years ago