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3 years ago

Question 9

Chemistry

1 answer:

Nadusha1986 [10]3 years ago

8 0

Answer:

Mass of carbon tetrachloride 135.15 g.

Explanation:

Given data:

Volume of carbon tetrachloride = 85.0 mL or 85.0 cm³

Density of carbon tetrachloride = 1.59 g/cm³

Mass of carbon tetrachloride = ?

Solution:

Formula:

D=m/v

D= density

m=mass

V=volume

Now we will put the values in formula:

1.59 g/cm³ = m / 85.0 cm³

m = 1.59 g/cm³ ×85.0 cm³

m = 135.15 g

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If two products, call them A and B react together to form product C, a general equation for the formation of C has the form:

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Where the symbol [ ] is the concentration of each compound.

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Normally you run controled trials in lab which permit to calculate k, m and n .

Here the data obtained in the lab are:

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Given that for trials 1 and 2 [A] is the same you can use those values to find n, in this way

rate 1 = 3.0 * 10^ -3 = k [A1]^m * [B1]^n

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[B1] = 0.010 and [B2] = 0.020 =>

6.0 / 3.0 =( 0.020 / 0.010)^n =>

2 = 2^n => n = 1

Given that for data 1 and 3 [B] is the same, you use those data to find m

rate 3 / rate 1 = 12 / 3.0 = (1.0)^m / (0.5)^m =>

4 = 2^m => m = 2

Now use any of the data to find k

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k = 3.0*10^-3 m/s / 0.025 m^3 = 0.12 m^-2 s^-1

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Answer: 4.5 * 10^-3 m/s

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