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2 years ago

48.5 moles of P4O10 contains how many moles of P

Chemistry

2 answers:

larisa [96]2 years ago

7 0

Answer : The number of moles of phosphorous are 194 moles.

Explanation : Given,

Moles of $P_4O_{10}$ = 48.5 moles

By the stoichiometry in $P_4O_{10}$ , there are 4 moles of phosphorus and 10 moles of oxygen.

As, 1 mole of $P_4O_{10}$ contains 4 moles of phosphorous

So, 48.5 moles of $P_4O_{10}$ contains $48.5\times 4=194$ moles of phosphorous

Therefore, the number of moles of phosphorous are 194 moles.

EastWind [94]2 years ago

3 0

So moles P = 4 x moles P4O10
= 4 x 68.5 mol
= 274 mol

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Sedbober [7]

The second answer, 80 J

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2 years ago

What alkene(s) would be produced from the dehydration of cyclopentanol?

Ronch [10]

The dehydration of cyclopentanol is shown in the balanced equation below:

Cyclopentanol => cyclopentene + H2O

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3 years ago

Using the average initial pH of your acetic acid solutions (2.96), and the average molarity of those solutions(.0602), calculate

Orlov [11]

Answer : The value of Ka for acetic acid is, $2.03\times 10^{-5}$

Explanation :

The chemical formula of acetic acid is, $CH_3COOH$ .

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Given:

pH = 2.96

First we have to calculate the concentration of hydrogen ion.

$pH=-\log [H^+]$

$2.96=-\log [H^+]$

$[H^+]=1.096\times 10^{-3}M$

That means,

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$[CH_3COOH]=0.0602-(1.096\times 10^{-3})=0.0591M$

The expression for reaction is:

$K_a=\frac{[CH_3COO^-][H^+]}{[CH_3COOH]}$

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3 years ago

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Answer:

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isotopes are various forms of same elements with different atomic number but different mass number.

Radioactivity is the emission of rays or particles from an atom to produce a new nuclei. There are various forms of radioactive emissions which are

Alpha particle emission \left \{ {{y=4} \atop {x=2}}He \right.
Beta particle emission \left \{ {{y=0} \atop {x=-1}}e \right.
gamma radiation \left \{ {{y=0} \atop {x=0}}γ \right.

in the problem the product formed after radiation was Pb-206. isotopes of lead include Pb-204, Pb-206, Pb-207, Pb-208. they all have atomic number 82. which means the radiation cannot be ∝ or β since both radiations will alter the atomic number of the parent nucleus.

Only gamma radiation with \left \{ {{y=0} \atop {x=0}}γ \right. will produce a Pb-206 of atomic number 82 and mass number 206 , since gamma ray have 0 mass and has 0 atomic number.equation is shown below

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