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4 years ago

How long would it take for an 88.0 gram sample to decay to only 5.50 grams if it has a half-life of 16.4 seconds?

Chemistry

2 answers:

bezimeni [28]4 years ago

7 0

Answer:

The answer is 65.6 secs.

a_sh-v [17]4 years ago

3 0

Answer: 65.23

Explanation:

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3 years ago

What is the name of the compound PbS2 • 4H2O?

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Lead Sulfate Tetrahydrate

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3 years ago

Suppose that 70g of a substance is dissolved in 100cm^3 of water at 80°C. How much of the substance, in grams, will precipitate

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3 years ago

What is the minimum (non-zero) thickness of a benzene (n = 1.501) thin film that will result in constructive interference when v

ad-work [718]

Explanation:

At each reflecting surface (benzene and glass) there will be 180 degree phase change.

Now, for constructive interference the optical path in benzene is $\lambda$ .

Formula to calculate thickness of a benzene thin film is as follows.

Optical path length through benzene ( $\lambda$ ) = $2 \times n \times d$

Hence, substituting the given values into the above formula as follows.

Optical path length through benzene = $2 \times n \times d$

d = $\frac{\text{Optical path length through benzene}}{2 \times n}$

= $\frac{\lambda}{2 \times n}$

= $\frac{615 \times 10^{-9}}{2 \times 1.501}$ (as 1 nm = $10^{-9}m$

= 204.9 m

Thus, we can conclude that minimum thickness of benzene is 204.9 m.

4 0

3 years ago

The initial concentration of reactant in a first-order reaction is 0.27 m. the rate constant for the reaction is 0.75 s-1. what

hjlf

The concentration in mol/l of reactant after 1.5 s is calculated as follows

from first order integrated equation

In (A)t = - Kt + In (A)o where
At = final concentration =?
A)o =initial concentration =0.27 M
K = constant=0.75
T=temperature = 1.5 s

in( A)t = -0.75(1.5) + in(0.27)

In (A)t =-1.125 +-1.31 =-2.435
In(A)t =-2.435

In (A)t = e
find the e value

( A)t is therefore =0.0876 mol/l

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4 years ago

Read 2 more answers