3 years ago

Which word is described by this description?

Chemistry

1 answer:

topjm [15]3 years ago

8 0

D.Richer scale
Definition: Richter scale is a quantitative measure of an earthquake's magnitude (size)

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How is burning wood a good illustration of the law of conservation of mass?

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The wood turns into ash and smoke so mass is nor destroyed or created.

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3 years ago

How many significant figures are in 4.8cm?

kramer

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Explanation: I took the exam. I hope I helped :)

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Oliga [24]

Geosphere >> Which is Earth's entire solid body..

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4 years ago

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andreev551 [17]

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3 years ago

at a particulat temperature, a smaple of pure water has a Kw of 7.7x10-14. what is the hydroxide concentration of this sample

ycow [4]

Answer: The hydroxide concentration of this sample is $3.85\times 10^{-7}$

Explanation:

When an expression is formed by taking the product of concentration of ions raised to the power of their stoichiometric coefficients in the solution of a salt is known as ionic product.

The ionic product for water is written as:

$K_w=[H^+]\times [OH^-]$

$7.7\times 10^{-14}=[H^+]\times [OH^-]$

As $[H^+]=[OH^-]$

$2[OH^-]=7.7\times 10^{-14}$

$[OH^-]=3.85\times 10^{-7}$

Thus hydroxide concentration of this sample is $3.85\times 10^{-7}$

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3 years ago