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uranmaximum [27]
3 years ago
14

Give one chemical and physical property of wood.

Physics
1 answer:
Pavlova-9 [17]3 years ago
6 0
Chemical 1. Wood is burnable , it can be burned , its most of the time brown

Physical 1.  Wood is most of the time hard , sometimes soft
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Answer:

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2 years ago
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Explain why a battery causes charge to flow spontaneously when the battery is inserted in a circuit
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3 years ago
A certain first-order reaction is 58% complete in 95 s. What are the values of the rate constant and the half-life for this proc
guajiro [1.7K]

Answer:

0.005734 s^{-1} and 20.86 seconds are the values of the rate constant and the half-life for this process respectively..

Explanation:

Expression for rate law for first order kinetics is given by:

a_o=a\times e^{-kt}

where,

k = rate constant  

t = age of sample

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a = amount left after decay process  

We have :

a_o=x

a=58\%\times x=0.58x

t = 95 s

0.58x=x\times e^{-k\times 95 s}

\k= 0.005734 s^{-1}

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t_{1/2}=\frac{0.693}{k}

=\frac{0.693}{0.005734 s^{-1}}=120.86 s

0.005734 s^{-1} and 20.86 seconds are the values of the rate constant and the half-life for this process respectively..

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Explanation:

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3 years ago
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