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3 years ago

How many molecules are in 4.545 moles of carbon dioxide (CO2)

Chemistry

1 answer:

Firdavs [7]3 years ago

7 0

Answer:

27.3699 x 10^23

Explanation:

Just do 4.545 x 6.022 x 10^23

1 mole of any substance = 6.022 x 10^23 molecules.

$4.545 \times 6.022 \times 10 {}^{23}$

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A weak base is added to water. Which information is required to find the strength of its conjugate acid?

lozanna [386]

Answer: C) the values of Kb and Kw

Explanation: i just took the test

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3 years ago

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An alpha particle has the same composition as a A) hydrogen nucleus B) deuterium nucleus C) beryllium nucleus D) helium nucleus

Elza [17]

Answer:

Helium Nucleus

Explanation:

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2 years ago

Which list best represents the flow of stimuli information in the body?

Vlad1618 [11]

The flow of stimuli information in the body is from the receptors to sensory neuron (afferent neurons) to the interneurons then to the central nervous system (brain and spinal cord) then is carried of by the motor neurons (efferent neurons) to the mucles involve.

Sensation to transduction to perception. Sensation is the ambiguous information which is received by the receptors or sensory organ henceforth, transduction occurs in the nerve cell protruding to the brain and is now called perception as the vague stimuli is interpreted and processed to be understood then is responded with the proper and apt response or reaction.

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3 years ago

The iodide ion reacts with hypochlorite ion (the active ingredient in chlorine bleaches) in the following way:

LiRa [457]

Explanation:

(a) As the given chemical reaction equation is as follows.

$OCl^{-} + I^{-} \rightarrow OI^{-1} + Cl^{-1}$

So, when we double the amount of hypochlorite or iodine then the rate of the reaction will also get double. And, this reaction is "first order" with respect to hypochlorite and iodine.

Hence, equation for rate law of reaction will be as follows.

Rate = $K \times [OCl^{-}] \times [l^{-}]$

(b) Since, the rate equation is as follows.

Rate = $K [OCl^{-}][l^{-}]$

Let us assume that ( $[OCl^{-}] = [l^{-}]$ )

Putting the given values into the above equation as follows.

$1.36 \times 10^{-4} = K \times (1.5 \times 10^{-3})^2$

$1.36 \times 10^{-4} = K \times (2.25 \times 10^{-6})$

K = $\frac{1.36 \times 10^{-4}}{2.25 \times 10^{-6}}$

= $60.4 M^{-1}sec^{-1}$

Hence, the value of rate constant for the given reaction is $60.4 M^{-1}sec^{-1}$ .

(c) Now, we will calculate the rate as follows.

Rate = $K [OCl^{-}][l^{-}]$

= $60.4 \times (1.8 \times 10^{3}) \times (6.0 \times 10^{4})$

= $6.52 \times 10^{5}$

Therefore, rate when $[OCl^{-}] = 1.8 \times 10^{3}$ M and $[I^{-}]= 6.0 \times 10^{4}$ M is $6.52 \times 10^{5}$ .

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3 years ago

true or false, Valence bond theory states that a bond between two atoms is the strongest when the nuclei of the atoms are touchi

pentagon [3]

Valence bond theory stating that a bond between two atoms is the strongest when the nuclei of the atoms are touching each other is true.

<h3>What is Valence bond theory?</h3>

This theory states that when two valence orbitals of two different atoms overlap on each other, the bond is usually strong.

The bond formed in this scenario is usually covalent which involves sharing of the valence electrons.

Read more about Valence bond theory here brainly.com/question/11625586

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2 years ago