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3 years ago

What are the units of k in a first order reaction?

Chemistry

1 answer:

sleet_krkn [62]3 years ago

6 0

Answer:

The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s).

Explanation:

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How many moles of O2 are produced when 0.500mol of KO2 reacts in this fashion?

Shtirlitz [24]

I think you means the KO2 reacts with H2O. The equation of this reaction is 4KO2+2H2O->4KOH +3O2. The ratio of mole number of O2 and KO2 is 3:4. So the mole number of O2 produced is 0.500/4*3=0.375 mol.

6 0

3 years ago

If an enclosure of 0.432 L has a partial pressure of O2 of 3.4×10−6 torr at 28 ∘C, what mass of magnesium will react according t

Mama L [17]

Answer:

184620169 g.

We can say that this mass corresponds to 184.6 ton

Explanation:

This is the reaction: 2Mg (s) + O₂(g) → 2MgO (s)

We have the data of O₂, so let's find out the moles with the Ideal Gases Law.

First of all, we convert pressure to atm

760 Torr / 3.4×10⁻⁶ Torr = 223529.4 atm

P .V = n . R . T

223529.4 atm . 0.432L = n . 0.082 L.atm/mol.K . 301K

(223529.4 atm . 0.432L) / (0.082 L.atm/mol.K . 301K) = 3798769 moles

Gosh!, These are a lot of moles.

Ratio is 1:2. So with 3798769 moles we would need the double of moles of Mg. → 3798769 mol .2 = 7597538 moles

Let's convert this moles into mass ( mol . molar mass)

7597538 mol . 24.3 g/mol = 184620169 g

We can convert this mass to ton

1 ton = 1×10⁶ g

184620169 g / 1×10⁶ g = 184.6 ton

5 0

4 years ago

A mixture of 0.220 moles rn, 0.350 moles o2 and 0.640 moles ar has a total pressure of 2.95 atm. what is the pressure of o2? a m

EastWind [94]

Answer:

0.85 atm

Explanation:

We start by getting the total number of moles of all gases.

Total moles = 0.220 + 0.350 + 0.640 = 1.21 mol

Then we get the fraction of Oxygen moles and multiply by the total pressure;

The pressure of O2 = 0.350 mol / 1.21 mol x 2.95 atm

= 0.85 atm

8 0

4 years ago

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Aspirin synthesis involves the addition of an acetyl group to salicylic acid in a condensation reaction with an alcohol. The ace

BARSIC [14]

Answer:

The correct appropriate will be Option 1 (Acid anhydrides are less stable than esters so the equilibrium favors the ester product.)

Explanation:

Acid anhydride, instead of just a carboxyl group, is typically favored for esterification. The predominant theory would be that Anhydride acid is somewhat more volatile than acid. This is favored equilibrium changes more toward the right of the whole ester structure.
Extremely responsive than carboxylic acid become acid anhydride as well as acyl chloride. Thus, for esterification, individuals were most favored.

The other options offered are not relevant to something like the scenario presented. So, the solution here is just the right one.

3 0

3 years ago

What value is closest to the mass of the atom?

slavikrds [6]

C. 10 amu i am 100 sure that it is 10 amu

8 0

3 years ago

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