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3 years ago

Given the reaction: S + O2 ---> SO2

Chemistry

1 answer:

Zarrin [17]3 years ago

7 0

Answer:

The answer to your question is 0.567 moles of S

Explanation:

Data

moles of S = ?

moles of SO₂ = 0.567

Balanced chemical reaction

S + O₂ ⇒ SO₂

Reactants Elements Products

1 S 1

2 O 2

Process

1.- Use proportions and cross multiplication to find the moles of Sulfur.

Consider the coefficients of the balanced chemical reaction.

1 mol of Sulfur ------------------- 1 mol of SO₂

x --------------------0.567 moles of SO₂

x = (0.567 x 1) / 1

x = 0.567 moles of S

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An aqueous solution of ________ will produce a neutral solution. An aqueous solution of ________ will produce a neutral solution

IRINA_888 [86]

Answer:

An aqueous solution of NaF will produce a neutral solution.

Explanation:

In order to classify the solutions, we need to dissociate all the salts and determine the conjugate pairs of base and acids.

NaNO₂ → Na⁺ + NO₂⁻

Na⁺ comes from the NaOH, a strong base, so the Na⁺ is the conjugate weak acid from the strong base. It will not react. This is a basic salt.

The NO₂⁻ is a conjugate strong base, that comes from the weak acid, nitrous acid. This ion can make hydrolisis.

NO₂⁻ + H₂O ⇄ HNO₂ + OH⁻ Kb

We give OH⁻ to medium, so solution is basic.

Li₂CO₃ → 2Li⁺ + CO₃⁻²

Li⁺ comes from the LiOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react

The CO₃⁻² is a conjugate strong base, that comes from the weak acid, carbonic acid. This ion can make hydrolisis.

CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb

NaClO₄ → Na⁺ + ClO₄⁻

Na⁺ comes from the NaOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react

The ClO₄⁻ is a conjugate strong base, that comes from the weak acid, perchloric acid. This ion can make hydrolisis. This is a basic salt.

ClO₄⁻ + H₂O ⇄ HClO₄⁻ + OH⁻ Kb

NH₄ClO₄ → NH₄⁺ + ClO₄⁻

Both ions can make hydrolisis. Ammonium comes from a weak base, so it is the strong conjugate base, and ClO₄⁻ is a conjugate strong base, that comes from the weak acid, perchloric acid

NH₄⁺ + H₂O ⇄ NH₃ + H₃O⁺ Ka

ClO₄⁻ + H₂O ⇄ HClO₄⁻ + OH⁻ Kb

This sort of salt are generally acid.

NaF → Na⁺ + F⁻

As we have seen, Na⁺ comes from the NaOH (a strong base) so it will not react.

This equilibrium can not occur: Na⁺ + H₂O ← NaOH + H⁺

F⁻ comes from a strong acid, HF so it will not also react. This reaction can not occur too: F⁻ + H₂O ← HF + OH⁻

We do not have reaction in this neutral salt, so the pH is neutral.

8 0

3 years ago

Convert 4.500000000 to scientific notation

aniked [119]

I think it’s 4.5 x 10^9

7 0

4 years ago

Gold has an atomic weight of 196.97 g/mol, and a density of 19.3 g/cm3. Approximately how many atoms are in a spherical gold nan

ale4655 [162]

<u>Answer:</u> The number of atoms in spherical gold nano particle are $26.918\times 10^4$

<u>Explanation:</u>

To calculate the volume of sphere, we use the equation:

$V=\frac{4}{3}\pi r^3$

where,

r = radius of the sphere = $10nm=10^{-6}cm$ (Conversion factor: $1nm=10^{-7}cm$ )

Putting values in above equation, we get:

$V=\frac{4}{3}\times 3.14\times (10^{-6})^3\\\\V=4.19\times 10^{-18}cm^3$

To calculate mass of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Volume of gold = $4.19\times 10^{-18}cm^3$

Density of gold = $19.3g/cm^3$

Putting values in above equation, we get:

$19.3g/cm^3=\frac{\text{Mass of gold}}{4.19\times 10^{-18}}\\\\\text{Mass of gold}=8.0867\times 10^{-17}g$

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Mass of gold = $8.8067\times 10^{-17}g$

Molar mass of gold = 196.97 g/mol

Putting values in above equation, we get:

$\text{Moles of gold}=\frac{8.8067\times 10^{-17}g}{196.97g/mol}=4.47\times 10^{-9}moles$

According to mole concept:

1 mole of an element contains $6.022\time 10^{23}$ number of atom

So, $4.47\times 10^{-19}$ moles of gold will contain = $4.47\times 10^{-19}\times 6.022\times 10^{23}=26.918\times 10^4$ number of atoms.

Hence, the number of atoms in spherical gold nano particle are $26.918\times 10^4$

8 0

3 years ago

Benzene is often produced as a side product during grignard reactions using phenylmagnesium bromide. how can its formation be ex

Alex_Xolod [135]

Benzene is produced as a side product when water react with phenyl magnesium bromide during Grignard reactions.

<h3>What is Grignard Reaction ? </h3>

The Grignard reaction involves an R-Mg-X, a carbon chain bound to a magnesium halide, used to form alcohols by attacking carbonyls such as in aldehydes or ketones.

Here R act as a nucleophile and Mg-X act as a electrophile. Instead of attacking carbonyl, which is present in the reaction, the benzene ring will attack water molecules present around, grabbing a H⁺ and pushing away MgBr .

The required reaction is :

PhMgBr + H₂O → Ph-H + MgBrOH

Thus from the above conclusion we can say that it is always advised to use dry Grignard to avoid this reaction.

Learn more about the GRIGNARD REACTION here :

brainly.com/question/23971610

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