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3 years ago

76.0 mol of P4O10 contains how many moles of P?

Chemistry

2 answers:

NikAS [45]3 years ago

8 0

For a mole of P4O10, there are 4 moles of P. Hence for 76 moles of P4O10, the number of P moles is a total of 304.

MAVERICK [17]3 years ago

6 0

Answer : The number of moles of phosphorous are 304 moles.

Explanation :

The formula of given compound is, $P_4O_{10}$

In $P_4O_{10}$ compound, there 4 moles of phosphorus and 10 moles of oxygen.

As we are given that the moles of $P_4O_{10}$ is 76.0 mole. Now we have to determine the number of moles of phosphorous (P).

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

So, 76.0 mole of $P_4O_{10}$ has $4\times 76.0=304moles$ of phosphorous

Therefore, the number of moles of phosphorous are 304 moles.

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The fact that HBO2, a reactive compound, was produced rather than the relatively inert B2O3 was a factor in the discontinuation

Reil [10]

Answer:

1027.62 g

Explanation:

For $B_2H_6$ :-

Mass of $B_2H_6$ = 296.1 g

Molar mass of $B_2H_6$ = 27.66 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{296.1\ g}{27.66\ g/mol}$

$Moles\ of\ B_2H_6= 10.705\ mol$

From the balanced reaction:-

$B_2H_6(g) + 3 O2_{(l)}\rightarrow 2 HBO_2_{(g)}+ 2 H_2O_{(l)}$

1 mole of $B_2H_6$ react with 3 moles of oxygen

Thus,

10.705 mole of $B_2H_6$ react with 3*10.705 moles of oxygen

Moles of oxygen = 32.115 moles

Molar mass of oxygen gas = 31.998 g/mol

Mass = Moles * Molar mass = 32.115 * 31.998 g = 1027.62 g

8 0

3 years ago

Will NaBr, CO2, Ca3(PO4), or KZS raise a liquid's boiling point the most when

Vladimir79 [104]

Answer:

$K_2S$

Explanation:

According to the boiling point elevation law described by the equation $\Delta T_b = iK_bb$ , the increase in boiling point is directly proportional to the van 't Hoff factor.

The van 't Hoff factor for nonelectrolytes is 1, while for ionic substances, it is equal to the number of moles of ions produced when 1 mole of salt dissolves.

$NaBr$ would produce 2 moles of ions per 1 mole of dissolved substance, sodium and bromide ions.

$Ca_3(PO_4)_2$ is insoluble in water, so it would barely dissociate and wouldn't practically change the boiling point.

$K_2S$ would dissociate into 3 moles of ions per 1 mole of substance, two potassium cations and one sulfide anion.

$CO_2$ is a gas, it would form some amount of carbonic acid when dissolved, however, carbonic acid is molecular and would yield i value of i = 1.

Therefore, potassium sulfide would raise a liquid's boiling point the most if all concentrations are equal.

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3 years ago

Coal is used in the making of _____. Select all that apply.

vodka [1.7K]

The answer is Plastics, Medicine, Clothing, Paper. Coal is used in the making of Plastics, Medicine, Clothing, Paper. Some important users of coal include alumina refineries, paper manufacturers, and the chemical and pharmaceutical industries. Thousands of different products have coal or coal by-products as components: soap, aspirins, solvents, dyes, plastics and fibres, such as rayon and nylon.

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3 years ago

Bradley was working in the lab. He accidentally poured a container of concentrated hydrochloric acid into his container of disti

nexus9112 [7]

Answer is: The solution has now become a good conductor of electricity.

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HCl(aq) → H⁺(aq) + Cl⁻(aq).

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4 0

3 years ago

Read 2 more answers

State what would be observed when the following pairs of reagents are mixed in a test tube.

Mandarinka [93]

Answer:

(i). C6H2COOH and Na2CO3(aq)

observation: Bubbles of a colourless gas (carbon dioxide gas)

(ii) CH3CH2CH2OH and KMnO4 /H

observation: The orange solution turns green.

[This is because oxidation of propanol to propanoic acid occurs]

(iii) CH3CH2OH and CH3COOH + conc. H2SO4

observation: A sweet fruity smell is formed.

[This is because an ester, diethylether is formed]

(iv) CH3CH = CHCH3 and Br2 /H2O

observation: a brown solution is formed.

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3 years ago