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3 years ago

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Air with less than 19.5% oxygen cannot support human life. How many moles of oxygen would the caisson if the percent of oxygen i

n the air dropped to 19.4%.

1 answer:

irinina [24]3 years ago

8 0

Are we adding the percent?

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describe how the current modern atomic theory and model differs from the model jj Thompson proposed ?

myrzilka [38]

J.J Thompson’s model shows a sphere with electrons that are moving around freely. However, Thompson’s model does not show protons or neutrons. The model that we have today gives a clearer structure showing protons, neutrons, and electrons inside an atom.

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3 years ago

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LenKa [72]

D. Electron cloud allowed the particles to pass through

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3 years ago

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What would the product look like if ROOR weren't used?

S_A_V [24]

Answer:

The least substituted product (anti-Markovnikov)

Explanation:

The ROOR is used in the addition reaction of HBr to an organic substance (an alkene for example).

In normal conditions (with no ROOR) the adition of the halogen will be performed in the most substituted C (following the rule of Markovnikov that says that the stability increases with the more substituted is the C).

But in presence of ROOR, the reaction takes other mechanism (free radicals), and the product in this case is the one with the Br added in the least substituted C.

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2 years ago

What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?

Liula [17]

There are 0.5 moles of NaCl present in a 29.22g sample.

to find moles of a compound you would look at the periodic table to find the mass. in this case, the mass of NaCl is 58.44 g/mol. now, you divide the sample mass of 29.22g by 58.44 g/mol. the grams will cancel each other out and you’re left with 0.5 mol in that sample

hope this helps!

3 0

3 years ago

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For the reaction H2O(g) + Cl2O(g) → 2HCIO(9), you know S rxn and Sosys and S° of HCIO(g) and of H2O(g). Write an expression that

Liono4ka [1.6K]

The expression that can be used to determine Cl2O(g) is ;

$S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}$

<h3>Determine an expression that can be used to determine Cl2O(g)</h3>

The general expression for ΔS°rxn of a chemical reaction

ΔS°rxn = ∑mS°products - ∑nS°reactants

where ; m and n = stoichiometry coefficients

Considering the given reaction : H₂O(g) + Cl₂O(g) → 2HCIO (g)

$\beta$ S°rxn = $2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) } ^{o} - S_{Cl_{2}O } ^{o}$ ------- ( 2 )

Rearranging the equation above

$S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}$

Hence we can conclude that The expression that can be used to determine Cl2O(g) is ;

$S_{cl_{2}o(g) } ^{o} = 2S_{HCIO(g)} ^{o} - S_{H_{2}O(g) }^{o} - \beta S_{rxn} ^{o}$

Learn more about stoichiometry : brainly.com/question/16060223

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2 years ago