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Rus_ich [418]
2 years ago
12

At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.086 s^-1:

Chemistry
1 answer:
tankabanditka [31]2 years ago
8 0

It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.

<h3>What is first-order kinetics?</h3>

First-order kinetics occur when a constant proportion of a reactant disappears per unit time.

Let's consider the following first-order kinetics reaction with a rate constant k = 0.086 s⁻¹.

2 H₃PO₄(aq) = P₂O₅(aq) + 3 H₂O(aq)

Given the initial concentation is [H₃PO₄]₀ = 1.27 M, the concentration representing 7.0% of this value is:

[H₃PO₄] = 7.0% × 1.27 M = 0.089 M

We can calculate the time elapsed (t) using the following expression.

ln ([H₃PO₄]/[H₃PO₄]₀) = - k × t

ln (0.089 M/1.27 M) = - 0.086 s⁻¹ × t

t = 31 s

It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.

Learn more about first-order kinetics here: brainly.com/question/18916637

#SPJ1

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If this compounds (N2O) molecular mass is 88g are the empirical and molecular formulas the same as one another or different
Softa [21]

Answer:

No

Explanation:

Let us examine this problem carefully:

Given compound is N₂O

Molecular mass = 88g

Now,

The empirical formula is the simplest formula of a compound.

The molecular formula is the true formula of the compound that shows that actual ratios of the atoms in a compound.

To find if they both have the same molecular and empirical formula, they must have the same molecular mass.

 For N₂O;

     Molecular mass = 2(14) + 16 = 44g/mole

But the true and given molecular formula of the compound is 88g/mole

This shows that the compound given is the empirical formula of the compound.

  Molecular formula:

              molecular mass of empirical formula x n = molecular mass of molecular formula

         n  = \frac{88}{44}  = 2

Molecular formula of compound = 2(N₂O) = N₄O₂

Therefore the empirical and molecular formulas are not the same

8 0
4 years ago
A function of a cell membranes in humans is the
r-ruslan [8.4K]
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4 0
3 years ago
4 C3H6 + 6 NO --&gt; 4 C3H3N + 6 H2O + N2
emmasim [6.3K]

4 moles

Explanation:

Given parameters:

number of moles of reacting NO = 24moles

Equation of the reaction:

    4C₃H₆     +     6NO    ⇒     4C₃H₃N   +  H₂O    +     N₂

Solution:

The moles is synonymous the quantity of matter that contains the avogadro's number of particles.

To solve this problem, we must ensure that the given equation is balanced by simply inspecting.

 The equation is balanced by inspection.

From the balanced equation;

          6 moles of NO reacted to produce 1 mole of nitrogen gas

        24 moles of NO will therefore produce    \frac{24}{6} = 4 moles

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

5 0
4 years ago
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