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Monica [59]
4 years ago
14

In a first-order reaction, how does the rate change if the concentration of the reactant decreases to one-third its original val

ue?
Chemistry
2 answers:
garik1379 [7]4 years ago
3 0
The rate decreases by a factor of one third 
podryga [215]4 years ago
3 0
Changes at the rate of 3 or the third rate
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#3 of thermo terms
Evgesh-ka [11]

Answer:

C

Explanation:

If the enthalpy change (i.e. Δ<em>H</em>) of a reaction is negative, then the reaction releases heat and is hence exothermic.

Hence, our answer is C.

Conversely, if Δ<em>H</em> is positive, the reaction absorbs heat and is endothermic.

Δ<em>H</em> tells us nothing about the speed of the reaction.

While Δ<em>H</em> influences free-energy change (Δ<em>G</em> = Δ<em>H</em> - <em>T</em>Δ<em>S</em>), we cannot predict the sign of Δ<em>G</em> given only Δ<em>H </em>(recall that a reaction is spontaneous if Δ<em>G</em> < 0).

4 0
3 years ago
What sort of nucleophile does NADH supply?
Elden [556K]

Answer:

Hydride ion

Explanation:

You often see the reduction with NADH written as

NADH ⟶ NAD⁺ + H⁺ + 2e⁻

If you think about it, H⁺ + 2e⁻ is equivalent to H:⁻, so we could write the reaction as

NADH ⟶ NAD⁺ + H:⁻

In terms of a mechanism, the dihydropyridine ring of NADH transfers a hydrogen atom with its pair of electrons (a hydride ion) to the substrate and becomes the more stable, aromatic pyridinium ion in NAD⁺.

7 0
4 years ago
What is the concentration of NaCI in an aqueous solution that contains 0.032 grams of NaCI in 600. Grams of the solution
jolli1 [7]

Answer:

0.00032 Grams of NaCl per 1 gram of the solution

Explanation:

8 0
3 years ago
What is the name of the compound with the formula NH HCO3 ?
svet-max [94.6K]

Answer:

Acid ammonium carbonate // Ammonium bicarbonate.

Explanation:

Hello, a 4 is missing in the fist H, thus:

NH_4HCO_3

The presence of the hydrogen between the ammonium and the carbonates characterizes the salt as an acid salt, so you could name it as acid ammonium carbonate or ammonium bicarbonate (similar to the sodium bicarbonate which is NaHCO_3).

Best regards.

6 0
3 years ago
What is the molecular formula of a molecule that has an empirical formula of CH and a molecular mass of 78.11 g
sveticcg [70]

Answer: C6H6

Explanation: Molecular Formula is the molecular mass divided by the empirical formula mass of CH which is C 12and H is 1 so 12 + 1= 13 g CH

Solution:

78.11 g CH / 13 g CH = 6

5 0
3 years ago
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