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ANEK [815]
3 years ago
7

At 700 k, the rate constant for this reaction is 6.2 × 10–4 min–1. how many minutes are required for 10.0% of a sample of cyclop

ropane to isomerize to propene?
Mathematics
1 answer:
Anna35 [415]3 years ago
8 0

Answer:

170 min

Step-by-step explanation:

We know that there is a kinetics of the first order, which has the following equation:

ln ([A] t / [A] o) = -k * t

Solving for t:

t = - ln ([A] t / [A] o) / k

How we want to know is the time required with 10%, so [A] t / [A] o = 100% - 10%, that is, 90% = 0.9. We also know that k = 6.2 * (10 ^ -4)

Knowing this, we replace:

t = - ln (0.90) /6.2 * (10 ^ -4)

t = 170 min

Which means it will take 170 minutes.

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Once a week you babysit your neighbor’s toddler after school, usually going to a local playground. You notice that each swing on
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Answer:

3.9 units

Step-by-step explanation:

We are given that,

Time taken by each swing = 2.2 seconds

The pendulum formula is given by, T = 2\pi \sqrt{\frac{L}{32}}, where T is the time taken and L is the length of the swing.

So, we have,

2.2= 2\pi \sqrt{\frac{L}{32}}

i.e. \frac{2.2}{2\pi}=\sqrt{\frac{L}{32}}

i.e. (\frac{2.2}{2\pi})^{2}=\frac{L}{32}

i.e. L=32\times (\frac{2.2}{2\pi})^{2}

i.e. L=32\times \frac{4.84}{4 \pi^2}

i.e. L=32\times \frac{1.21}{\pi^2}

i.e. L=\frac{38.72}{9.87}

i.e. L = 3.923 units

So, rounded to tenths, the length of the swing is 3.9 units.

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3 years ago
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muminat

Answer:

y= -2x+15

Step-by-step explanation:

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3 years ago
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