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Pani-rosa [81]
3 years ago
14

≡↔∛ππΔ≅×π⊄∴khvjh j hjgvvvvvvvvvvvvvh jh

Chemistry
1 answer:
cupoosta [38]3 years ago
7 0

its 40

I just took the test right now to get this answer

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under certain water​ conditions, the free chlorine​ (hypochlorous acid,​ hocl) in a swimming pool decomposes according to the la
ivolga24 [154]

Answer:

1.7 ppm

Explanation:

Original amount N' = 2.6 ppm

time to testing t = 24 hr

final amount N = 2.1 ppm

Using exponential inhibited decay, we have

N = N'e^(-kt)

Where

N is the new reading

N' is the original reading

t is the decay time

k is the decay constant

Substituting, we have

2.1 = 2.6 x e^(-k x 24)

2.1 = 2.6 x e^(-24k)

0.808 = e^(-24k)

We take the natural log of both sides of the equation

Ln 0.808 = Ln (e^(-24k))

-0.213 = - 24k

K = 0.213/24 = 0.00886

After 48 hrs, the reading of free chlorine will be

N = 2.6 x e^(-0.00886 x 48)

N = 2.6 x e^(-0.425)

N = 2.6 x 0.654

N = 1.7 ppm

5 0
3 years ago
What is the name for Cl₇Br₄ *
Margarita [4]

Answer: no se wey jaja que le pusiste tu ?

Explanation:

4 0
2 years ago
What is the volume (in liters) of a 5.98 gram sample of O2 at STP?
borishaifa [10]

Answer:

4.186 L

Explanation:

Using the pv=nrt equation and converting the grams of O2 into mols. After finding the number of mols by dividing 5.98 by 32 (2*the atomic weight of O) you plug that into the equation. So then you have 1*V=.186875*.08206*273 then you rearrange the equation to solve for v and get 4.186 L

4 0
3 years ago
What drives an electrolytic cell?
hodyreva [135]

Answer:

C. An external voltage source

Explanation:

An electrolytic cell converts electrical energy from an external voltage source into chemical energy that drives a reaction.

The external voltage source is usually a battery. This energy form generated from the battery helps to drive chemical reactions.

The process involves the decomposition of an ionic compound by means of current passed into the aqueous or molten form of the compound through conductors known as electrodes.

3 0
3 years ago
Read 2 more answers
6.25 g of HCl(g), a strong acid, is dissolved in water to make a 280-ml solution.
elena-14-01-66 [18.8K]

pH= -log[0,611]= 0,21

7 0
3 years ago
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