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Vlada [557]
3 years ago
7

What is occurring with the velocity between points D and E?

Chemistry
1 answer:
vichka [17]3 years ago
8 0

Answer:

a

Explanation:

the line is going down

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Cuantos miles de sulfato de calcio están en 60 gramos de sustancia
seropon [69]
No hay suficiente informacion.
8 0
4 years ago
What is another name for producer why are they called this​
just olya [345]

Answer:

Autotrophs

Explanation:

They are responsible for the production of food. Root words "auto" for self and "troph" for food.

3 0
3 years ago
3) A certain reaction has the following general form: A + B à AB At a particular temperature the concentration versus time were
seropon [69]

Answer:

a. First order.

b. k=3.7x10^{-3}s ^{-1}

c. t_{1/2}=187.3s

d. [A]=0.111M

Explanation:

Hello.

a. In this case since the slope is in s⁻¹ we can infer that the lineal form of the rate law is:

ln[A]=-kt+ln[A]_0

Which is also:

y=mx+b

It means that the reaction is first-order as slope equals the negative of the rate constant which also has units of first-oder reaction.

b. Since the slope is −3.7 x 10−3 s−1 the rate constant is:

k=-m\\\\k=-(-3.7x10^{-3}s ^{-1})\\\\k=3.7x10^{-3}s ^{-1}

c. For first-order reactions, the half-life is:

t_{1/2}=\frac{ln(2)}{k}\\ \\t_{1/2}=\frac{ln(2)}{3.7x10^{-3}s^{-1}}\\\\t_{1/2}=187.3s

d. In this case, since the integrated first-order rate law is:

[A]=[A]_0exp(-kt)

The concentration once 220 seconds have passed is:

[A]=0.250Mexp(-3.7x10^{-3}s^{-1}*220s)\\\\

[A]=0.111M

Regards.

7 0
4 years ago
Using alcohols as solvents offers the advantage of using ro- ions which are somewhat stronger ______ than the hydroxide ion.
podryga [215]
The answer is "Ro-ions which are somewhat stronger bases than the hydroxide ion.
These ro-ions are also known as alkoxide ions, and these are stronger bases. the reason behind this is that the alcohols are weaker acids than the water. Alcohols are also used as solvent in some organic reactions and this offers and advantage to use ro-ions.
5 0
3 years ago
What 3 pieces of evidence did wegener use to support his theory
GenaCL600 [577]
1. Fossils, rocks and mountain range

2. The location of ancient climatic zones.

3. The continents have moves from the continental drift several lines of evidence
6 0
3 years ago
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