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Dmitry [639]
3 years ago
5

1 Define Soft water and Hard water.​

Chemistry
1 answer:
madreJ [45]3 years ago
3 0

Answer

software is a set of instruction given to a computer to perform specific function. MS office etc.

the tangible parts of a computer are known as hardware.

Explanation:

software pprforms the function while hardwares are the structural parts of a computer.

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Tritium has a half-life of 12.3 years. When the activity of a tritium sample has decreased to 6.25% of its original value, how m
irakobra [83]

Answer:

t = 49.20 years

Explanation:

Half life expression for first order kinetic is:

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k=\frac{\ln2}{12.3}\ years^{-1}

The rate constant, k = 0.05635 years⁻¹

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

Given:

[A_t] is 6.25 % of [A_0]. So,

\frac {[A_t]}{[A_0]} = 0.0625

t = ?

\frac {[A_t]}{[A_0]}=e^{-k\times t}

0.0625=e^{-0.05635\times t}

<u>t = 49.20 years</u>

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