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Grace [21]
3 years ago
6

-(x+23)=34 find x-(2-3)+(2+3)​

Chemistry
1 answer:
Elina [12.6K]3 years ago
3 0

this is the answers and working out to both questions

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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
Suppose you wanted to monitor a pH change between 5.3 and 6.3. Which indicator would be most appropriate?
umka2103 [35]
It would be acidic based indicator.
0-6 is acidic
7 is neutral 
8-14 is alkaline
7 0
4 years ago
Read 2 more answers
Calculate the acceleration of a car that slows from 50 m/s to 30 m/s in 10 seconds
olasank [31]
The answer is 2 m/s^2
5 0
3 years ago
Calculate the density of a material that has a mass of 50.5g and a volume of 14.5cm3.
White raven [17]
Density = mass / volume = 50.5/14.5 = 3.48 g/cm ^{3}.
4 0
3 years ago
¿Qué elemento rompe la regla del carácter metálico?​
notka56 [123]

Answer:

the machete

Explanation:

:)

3 0
3 years ago
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